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cobalt / cobalt / 3da06c67874e20fcbbefe517442f256057ad9e27 / . / src / third_party / v8 / src / compiler / wasm-compiler.cc
blob: fa085780c00a542052eef644bcf15c17db4e99b3 [file] [log] [blame]
// Copyright 2015 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "src/compiler/wasm-compiler.h"
#include <memory>
#include "src/base/optional.h"
#include "src/base/platform/elapsed-timer.h"
#include "src/base/platform/platform.h"
#include "src/base/small-vector.h"
#include "src/base/v8-fallthrough.h"
#include "src/codegen/assembler-inl.h"
#include "src/codegen/assembler.h"
#include "src/codegen/code-factory.h"
#include "src/codegen/compiler.h"
#include "src/codegen/interface-descriptors.h"
#include "src/codegen/machine-type.h"
#include "src/codegen/optimized-compilation-info.h"
#include "src/compiler/backend/code-generator.h"
#include "src/compiler/backend/instruction-selector.h"
#include "src/compiler/common-operator.h"
#include "src/compiler/compiler-source-position-table.h"
#include "src/compiler/diamond.h"
#include "src/compiler/graph-assembler.h"
#include "src/compiler/graph-visualizer.h"
#include "src/compiler/graph.h"
#include "src/compiler/int64-lowering.h"
#include "src/compiler/linkage.h"
#include "src/compiler/machine-operator.h"
#include "src/compiler/node-matchers.h"
#include "src/compiler/node-origin-table.h"
#include "src/compiler/node-properties.h"
#include "src/compiler/pipeline.h"
#include "src/compiler/simd-scalar-lowering.h"
#include "src/compiler/zone-stats.h"
#include "src/execution/isolate-inl.h"
#include "src/heap/factory.h"
#include "src/logging/counters.h"
#include "src/logging/log.h"
#include "src/objects/heap-number.h"
#include "src/roots/roots.h"
#include "src/tracing/trace-event.h"
#include "src/trap-handler/trap-handler.h"
#include "src/utils/vector.h"
#include "src/wasm/function-body-decoder-impl.h"
#include "src/wasm/function-compiler.h"
#include "src/wasm/graph-builder-interface.h"
#include "src/wasm/jump-table-assembler.h"
#include "src/wasm/memory-tracing.h"
#include "src/wasm/object-access.h"
#include "src/wasm/wasm-code-manager.h"
#include "src/wasm/wasm-constants.h"
#include "src/wasm/wasm-limits.h"
#include "src/wasm/wasm-linkage.h"
#include "src/wasm/wasm-module.h"
#include "src/wasm/wasm-objects-inl.h"
#include "src/wasm/wasm-opcodes-inl.h"
namespace v8 {
namespace internal {
namespace compiler {
namespace {
#define FATAL_UNSUPPORTED_OPCODE(opcode) \
FATAL("Unsupported opcode 0x%x:%s", (opcode), \
wasm::WasmOpcodes::OpcodeName(opcode));
MachineType assert_size(int expected_size, MachineType type) {
DCHECK_EQ(expected_size, ElementSizeInBytes(type.representation()));
return type;
}
#define WASM_INSTANCE_OBJECT_SIZE(name) \
(WasmInstanceObject::k##name##OffsetEnd - \
WasmInstanceObject::k##name##Offset + 1) // NOLINT(whitespace/indent)
#define WASM_INSTANCE_OBJECT_OFFSET(name) \
wasm::ObjectAccess::ToTagged(WasmInstanceObject::k##name##Offset)
// We would like to use gasm_->Call() to implement this macro,
// but this doesn't work currently when we try to call it from functions
// which set IfSuccess/IfFailure control paths (e.g. within Throw()).
// TODO(manoskouk): Maybe clean this up at some point?
#define CALL_BUILTIN(name, ...) \
SetEffect(graph()->NewNode( \
mcgraph()->common()->Call(GetBuiltinCallDescriptor<name##Descriptor>( \
this, StubCallMode::kCallBuiltinPointer)), \
GetBuiltinPointerTarget(Builtins::k##name), ##__VA_ARGS__, effect(), \
control()))
#define LOAD_INSTANCE_FIELD(name, type) \
gasm_->Load(assert_size(WASM_INSTANCE_OBJECT_SIZE(name), type), \
instance_node_.get(), WASM_INSTANCE_OBJECT_OFFSET(name))
#define LOAD_FULL_POINTER(base_pointer, byte_offset) \
gasm_->Load(MachineType::Pointer(), base_pointer, byte_offset)
#define LOAD_TAGGED_POINTER(base_pointer, byte_offset) \
gasm_->Load(MachineType::TaggedPointer(), base_pointer, byte_offset)
#define LOAD_TAGGED_ANY(base_pointer, byte_offset) \
gasm_->Load(MachineType::AnyTagged(), base_pointer, byte_offset)
#define LOAD_FIXED_ARRAY_SLOT(array_node, index, type) \
gasm_->Load(type, array_node, \
wasm::ObjectAccess::ElementOffsetInTaggedFixedArray(index))
#define LOAD_FIXED_ARRAY_SLOT_SMI(array_node, index) \
LOAD_FIXED_ARRAY_SLOT(array_node, index, MachineType::TaggedSigned())
#define LOAD_FIXED_ARRAY_SLOT_PTR(array_node, index) \
LOAD_FIXED_ARRAY_SLOT(array_node, index, MachineType::TaggedPointer())
#define LOAD_FIXED_ARRAY_SLOT_ANY(array_node, index) \
LOAD_FIXED_ARRAY_SLOT(array_node, index, MachineType::AnyTagged())
#define STORE_RAW(base, offset, val, rep, barrier) \
STORE_RAW_NODE_OFFSET(base, gasm_->Int32Constant(offset), val, rep, barrier)
#define STORE_RAW_NODE_OFFSET(base, node_offset, val, rep, barrier) \
gasm_->Store(StoreRepresentation(rep, barrier), base, node_offset, val)
// This can be used to store tagged Smi values only.
#define STORE_FIXED_ARRAY_SLOT_SMI(array_node, index, value) \
STORE_RAW(array_node, \
wasm::ObjectAccess::ElementOffsetInTaggedFixedArray(index), value, \
MachineRepresentation::kTaggedSigned, kNoWriteBarrier)
// This can be used to store any tagged (Smi and HeapObject) value.
#define STORE_FIXED_ARRAY_SLOT_ANY(array_node, index, value) \
STORE_RAW(array_node, \
wasm::ObjectAccess::ElementOffsetInTaggedFixedArray(index), value, \
MachineRepresentation::kTagged, kFullWriteBarrier)
void EnsureEnd(MachineGraph* mcgraph) {
Graph* g = mcgraph->graph();
if (g->end() == nullptr) {
g->SetEnd(g->NewNode(mcgraph->common()->End(0)));
}
}
void MergeControlToEnd(MachineGraph* mcgraph, Node* node) {
EnsureEnd(mcgraph);
NodeProperties::MergeControlToEnd(mcgraph->graph(), mcgraph->common(), node);
}
bool ContainsSimd(const wasm::FunctionSig* sig) {
for (auto type : sig->all()) {
if (type == wasm::kWasmS128) return true;
}
return false;
}
bool ContainsInt64(const wasm::FunctionSig* sig) {
for (auto type : sig->all()) {
if (type == wasm::kWasmI64) return true;
}
return false;
}
template <typename BuiltinDescriptor>
CallDescriptor* GetBuiltinCallDescriptor(WasmGraphBuilder* builder,
StubCallMode stub_mode) {
BuiltinDescriptor interface_descriptor;
return Linkage::GetStubCallDescriptor(
builder->mcgraph()->zone(), // zone
interface_descriptor, // descriptor
interface_descriptor.GetStackParameterCount(), // stack parameter count
CallDescriptor::kNoFlags, // flags
Operator::kNoProperties, // properties
stub_mode); // stub call mode
}
} // namespace
class WasmGraphAssembler : public GraphAssembler {
public:
WasmGraphAssembler(MachineGraph* mcgraph, Zone* zone)
: GraphAssembler(mcgraph, zone) {}
};
WasmGraphBuilder::WasmGraphBuilder(
wasm::CompilationEnv* env, Zone* zone, MachineGraph* mcgraph,
const wasm::FunctionSig* sig,
compiler::SourcePositionTable* source_position_table)
: gasm_(std::make_unique<WasmGraphAssembler>(mcgraph, zone)),
zone_(zone),
mcgraph_(mcgraph),
env_(env),
has_simd_(ContainsSimd(sig)),
untrusted_code_mitigations_(FLAG_untrusted_code_mitigations),
sig_(sig),
source_position_table_(source_position_table) {
DCHECK_IMPLIES(use_trap_handler(), trap_handler::IsTrapHandlerEnabled());
DCHECK_NOT_NULL(mcgraph_);
}
// Destructor define here where the definition of {WasmGraphAssembler} is
// available.
WasmGraphBuilder::~WasmGraphBuilder() = default;
Node* WasmGraphBuilder::Error() { return mcgraph()->Dead(); }
Node* WasmGraphBuilder::Start(unsigned params) {
Node* start = graph()->NewNode(mcgraph()->common()->Start(params));
graph()->SetStart(start);
return start;
}
Node* WasmGraphBuilder::Param(unsigned index) {
return graph()->NewNode(mcgraph()->common()->Parameter(index),
graph()->start());
}
Node* WasmGraphBuilder::Loop(Node* entry) {
return graph()->NewNode(mcgraph()->common()->Loop(1), entry);
}
Node* WasmGraphBuilder::TerminateLoop(Node* effect, Node* control) {
Node* terminate =
graph()->NewNode(mcgraph()->common()->Terminate(), effect, control);
MergeControlToEnd(mcgraph(), terminate);
return terminate;
}
Node* WasmGraphBuilder::TerminateThrow(Node* effect, Node* control) {
Node* terminate =
graph()->NewNode(mcgraph()->common()->Throw(), effect, control);
MergeControlToEnd(mcgraph(), terminate);
return terminate;
}
bool WasmGraphBuilder::IsPhiWithMerge(Node* phi, Node* merge) {
return phi && IrOpcode::IsPhiOpcode(phi->opcode()) &&
NodeProperties::GetControlInput(phi) == merge;
}
bool WasmGraphBuilder::ThrowsException(Node* node, Node** if_success,
Node** if_exception) {
if (node->op()->HasProperty(compiler::Operator::kNoThrow)) {
return false;
}
*if_success = graph()->NewNode(mcgraph()->common()->IfSuccess(), node);
*if_exception =
graph()->NewNode(mcgraph()->common()->IfException(), node, node);
return true;
}
void WasmGraphBuilder::AppendToMerge(Node* merge, Node* from) {
DCHECK(IrOpcode::IsMergeOpcode(merge->opcode()));
merge->AppendInput(mcgraph()->zone(), from);
int new_size = merge->InputCount();
NodeProperties::ChangeOp(
merge, mcgraph()->common()->ResizeMergeOrPhi(merge->op(), new_size));
}
void WasmGraphBuilder::AppendToPhi(Node* phi, Node* from) {
DCHECK(IrOpcode::IsPhiOpcode(phi->opcode()));
int new_size = phi->InputCount();
phi->InsertInput(mcgraph()->zone(), phi->InputCount() - 1, from);
NodeProperties::ChangeOp(
phi, mcgraph()->common()->ResizeMergeOrPhi(phi->op(), new_size));
}
Node* WasmGraphBuilder::Merge(unsigned count, Node** controls) {
return graph()->NewNode(mcgraph()->common()->Merge(count), count, controls);
}
Node* WasmGraphBuilder::Phi(wasm::ValueType type, unsigned count,
Node** vals_and_control) {
DCHECK(IrOpcode::IsMergeOpcode(vals_and_control[count]->opcode()));
return graph()->NewNode(
mcgraph()->common()->Phi(type.machine_representation(), count), count + 1,
vals_and_control);
}
Node* WasmGraphBuilder::EffectPhi(unsigned count, Node** effects_and_control) {
DCHECK(IrOpcode::IsMergeOpcode(effects_and_control[count]->opcode()));
return graph()->NewNode(mcgraph()->common()->EffectPhi(count), count + 1,
effects_and_control);
}
Node* WasmGraphBuilder::RefNull() {
return LOAD_FULL_POINTER(
BuildLoadIsolateRoot(),
IsolateData::root_slot_offset(RootIndex::kNullValue));
}
Node* WasmGraphBuilder::RefFunc(uint32_t function_index) {
auto call_descriptor = GetBuiltinCallDescriptor<WasmRefFuncDescriptor>(
this, StubCallMode::kCallWasmRuntimeStub);
// A direct call to a wasm runtime stub defined in this module.
// Just encode the stub index. This will be patched at relocation.
Node* call_target = mcgraph()->RelocatableIntPtrConstant(
wasm::WasmCode::kWasmRefFunc, RelocInfo::WASM_STUB_CALL);
return SetEffectControl(graph()->NewNode(
mcgraph()->common()->Call(call_descriptor), call_target,
mcgraph()->Uint32Constant(function_index), effect(), control()));
}
Node* WasmGraphBuilder::RefAsNonNull(Node* arg,
wasm::WasmCodePosition position) {
TrapIfTrue(wasm::kTrapIllegalCast, gasm_->WordEqual(arg, RefNull()),
position);
return arg;
}
Node* WasmGraphBuilder::NoContextConstant() {
return mcgraph()->IntPtrConstant(0);
}
Node* WasmGraphBuilder::BuildLoadIsolateRoot() {
// The IsolateRoot is loaded from the instance node so that the generated
// code is Isolate independent. This can be overridden by setting a specific
// node in {isolate_root_node_} beforehand.
if (isolate_root_node_.is_set()) return isolate_root_node_.get();
return LOAD_INSTANCE_FIELD(IsolateRoot, MachineType::Pointer());
}
Node* WasmGraphBuilder::Int32Constant(int32_t value) {
return mcgraph()->Int32Constant(value);
}
Node* WasmGraphBuilder::Int64Constant(int64_t value) {
return mcgraph()->Int64Constant(value);
}
void WasmGraphBuilder::StackCheck(wasm::WasmCodePosition position) {
DCHECK_NOT_NULL(env_); // Wrappers don't get stack checks.
if (!FLAG_wasm_stack_checks || !env_->runtime_exception_support) {
return;
}
Node* limit_address = graph()->NewNode(
mcgraph()->machine()->Load(MachineType::Pointer()), instance_node_.get(),
mcgraph()->Int32Constant(WASM_INSTANCE_OBJECT_OFFSET(StackLimitAddress)),
effect(), control());
Node* limit = SetEffect(graph()->NewNode(
mcgraph()->machine()->Load(MachineType::Pointer()), limit_address,
mcgraph()->IntPtrConstant(0), limit_address, control()));
Node* check = SetEffect(graph()->NewNode(
mcgraph()->machine()->StackPointerGreaterThan(StackCheckKind::kWasm),
limit, effect()));
Diamond stack_check(graph(), mcgraph()->common(), check, BranchHint::kTrue);
stack_check.Chain(control());
if (stack_check_call_operator_ == nullptr) {
// Build and cache the stack check call operator and the constant
// representing the stack check code.
auto call_descriptor = Linkage::GetStubCallDescriptor(
mcgraph()->zone(), // zone
NoContextDescriptor{}, // descriptor
0, // stack parameter count
CallDescriptor::kNoFlags, // flags
Operator::kNoProperties, // properties
StubCallMode::kCallWasmRuntimeStub); // stub call mode
// A direct call to a wasm runtime stub defined in this module.
// Just encode the stub index. This will be patched at relocation.
stack_check_code_node_.set(mcgraph()->RelocatableIntPtrConstant(
wasm::WasmCode::kWasmStackGuard, RelocInfo::WASM_STUB_CALL));
stack_check_call_operator_ = mcgraph()->common()->Call(call_descriptor);
}
Node* call = graph()->NewNode(stack_check_call_operator_.get(),
stack_check_code_node_.get(), effect(),
stack_check.if_false);
SetSourcePosition(call, position);
Node* ephi = stack_check.EffectPhi(effect(), call);
SetEffectControl(ephi, stack_check.merge);
}
void WasmGraphBuilder::PatchInStackCheckIfNeeded() {
if (!needs_stack_check_) return;
Node* start = graph()->start();
// Place a stack check which uses a dummy node as control and effect.
Node* dummy = graph()->NewNode(mcgraph()->common()->Dead());
SetEffectControl(dummy);
// The function-prologue stack check is associated with position 0, which
// is never a position of any instruction in the function.
StackCheck(0);
// In testing, no steck checks were emitted. Nothing to rewire then.
if (effect() == dummy) return;
// Now patch all control uses of {start} to use {control} and all effect uses
// to use {effect} instead. Then rewire the dummy node to use start instead.
NodeProperties::ReplaceUses(start, start, effect(), control());
NodeProperties::ReplaceUses(dummy, nullptr, start, start);
}
Node* WasmGraphBuilder::Binop(wasm::WasmOpcode opcode, Node* left, Node* right,
wasm::WasmCodePosition position) {
const Operator* op;
MachineOperatorBuilder* m = mcgraph()->machine();
switch (opcode) {
case wasm::kExprI32Add:
op = m->Int32Add();
break;
case wasm::kExprI32Sub:
op = m->Int32Sub();
break;
case wasm::kExprI32Mul:
op = m->Int32Mul();
break;
case wasm::kExprI32DivS:
return BuildI32DivS(left, right, position);
case wasm::kExprI32DivU:
return BuildI32DivU(left, right, position);
case wasm::kExprI32RemS:
return BuildI32RemS(left, right, position);
case wasm::kExprI32RemU:
return BuildI32RemU(left, right, position);
case wasm::kExprI32And:
op = m->Word32And();
break;
case wasm::kExprI32Ior:
op = m->Word32Or();
break;
case wasm::kExprI32Xor:
op = m->Word32Xor();
break;
case wasm::kExprI32Shl:
op = m->Word32Shl();
right = MaskShiftCount32(right);
break;
case wasm::kExprI32ShrU:
op = m->Word32Shr();
right = MaskShiftCount32(right);
break;
case wasm::kExprI32ShrS:
op = m->Word32Sar();
right = MaskShiftCount32(right);
break;
case wasm::kExprI32Ror:
op = m->Word32Ror();
right = MaskShiftCount32(right);
break;
case wasm::kExprI32Rol:
if (m->Word32Rol().IsSupported()) {
op = m->Word32Rol().op();
right = MaskShiftCount32(right);
break;
}
return BuildI32Rol(left, right);
case wasm::kExprI32Eq:
op = m->Word32Equal();
break;
case wasm::kExprI32Ne:
return Invert(Binop(wasm::kExprI32Eq, left, right));
case wasm::kExprI32LtS:
op = m->Int32LessThan();
break;
case wasm::kExprI32LeS:
op = m->Int32LessThanOrEqual();
break;
case wasm::kExprI32LtU:
op = m->Uint32LessThan();
break;
case wasm::kExprI32LeU:
op = m->Uint32LessThanOrEqual();
break;
case wasm::kExprI32GtS:
op = m->Int32LessThan();
std::swap(left, right);
break;
case wasm::kExprI32GeS:
op = m->Int32LessThanOrEqual();
std::swap(left, right);
break;
case wasm::kExprI32GtU:
op = m->Uint32LessThan();
std::swap(left, right);
break;
case wasm::kExprI32GeU:
op = m->Uint32LessThanOrEqual();
std::swap(left, right);
break;
case wasm::kExprI64And:
op = m->Word64And();
break;
case wasm::kExprI64Add:
op = m->Int64Add();
break;
case wasm::kExprI64Sub:
op = m->Int64Sub();
break;
case wasm::kExprI64Mul:
op = m->Int64Mul();
break;
case wasm::kExprI64DivS:
return BuildI64DivS(left, right, position);
case wasm::kExprI64DivU:
return BuildI64DivU(left, right, position);
case wasm::kExprI64RemS:
return BuildI64RemS(left, right, position);
case wasm::kExprI64RemU:
return BuildI64RemU(left, right, position);
case wasm::kExprI64Ior:
op = m->Word64Or();
break;
case wasm::kExprI64Xor:
op = m->Word64Xor();
break;
case wasm::kExprI64Shl:
op = m->Word64Shl();
right = MaskShiftCount64(right);
break;
case wasm::kExprI64ShrU:
op = m->Word64Shr();
right = MaskShiftCount64(right);
break;
case wasm::kExprI64ShrS:
op = m->Word64Sar();
right = MaskShiftCount64(right);
break;
case wasm::kExprI64Eq:
op = m->Word64Equal();
break;
case wasm::kExprI64Ne:
return Invert(Binop(wasm::kExprI64Eq, left, right));
case wasm::kExprI64LtS:
op = m->Int64LessThan();
break;
case wasm::kExprI64LeS:
op = m->Int64LessThanOrEqual();
break;
case wasm::kExprI64LtU:
op = m->Uint64LessThan();
break;
case wasm::kExprI64LeU:
op = m->Uint64LessThanOrEqual();
break;
case wasm::kExprI64GtS:
op = m->Int64LessThan();
std::swap(left, right);
break;
case wasm::kExprI64GeS:
op = m->Int64LessThanOrEqual();
std::swap(left, right);
break;
case wasm::kExprI64GtU:
op = m->Uint64LessThan();
std::swap(left, right);
break;
case wasm::kExprI64GeU:
op = m->Uint64LessThanOrEqual();
std::swap(left, right);
break;
case wasm::kExprI64Ror:
op = m->Word64Ror();
right = MaskShiftCount64(right);
break;
case wasm::kExprI64Rol:
if (m->Word64Rol().IsSupported()) {
op = m->Word64Rol().op();
right = MaskShiftCount64(right);
break;
} else if (m->Word32Rol().IsSupported()) {
op = m->Word64Rol().placeholder();
break;
}
return BuildI64Rol(left, right);
case wasm::kExprF32CopySign:
return BuildF32CopySign(left, right);
case wasm::kExprF64CopySign:
return BuildF64CopySign(left, right);
case wasm::kExprF32Add:
op = m->Float32Add();
break;
case wasm::kExprF32Sub:
op = m->Float32Sub();
break;
case wasm::kExprF32Mul:
op = m->Float32Mul();
break;
case wasm::kExprF32Div:
op = m->Float32Div();
break;
case wasm::kExprF32Eq:
op = m->Float32Equal();
break;
case wasm::kExprF32Ne:
return Invert(Binop(wasm::kExprF32Eq, left, right));
case wasm::kExprF32Lt:
op = m->Float32LessThan();
break;
case wasm::kExprF32Ge:
op = m->Float32LessThanOrEqual();
std::swap(left, right);
break;
case wasm::kExprF32Gt:
op = m->Float32LessThan();
std::swap(left, right);
break;
case wasm::kExprF32Le:
op = m->Float32LessThanOrEqual();
break;
case wasm::kExprF64Add:
op = m->Float64Add();
break;
case wasm::kExprF64Sub:
op = m->Float64Sub();
break;
case wasm::kExprF64Mul:
op = m->Float64Mul();
break;
case wasm::kExprF64Div:
op = m->Float64Div();
break;
case wasm::kExprF64Eq:
op = m->Float64Equal();
break;
case wasm::kExprF64Ne:
return Invert(Binop(wasm::kExprF64Eq, left, right));
case wasm::kExprF64Lt:
op = m->Float64LessThan();
break;
case wasm::kExprF64Le:
op = m->Float64LessThanOrEqual();
break;
case wasm::kExprF64Gt:
op = m->Float64LessThan();
std::swap(left, right);
break;
case wasm::kExprF64Ge:
op = m->Float64LessThanOrEqual();
std::swap(left, right);
break;
case wasm::kExprF32Min:
op = m->Float32Min();
break;
case wasm::kExprF64Min:
op = m->Float64Min();
break;
case wasm::kExprF32Max:
op = m->Float32Max();
break;
case wasm::kExprF64Max:
op = m->Float64Max();
break;
case wasm::kExprF64Pow:
return BuildF64Pow(left, right);
case wasm::kExprF64Atan2:
op = m->Float64Atan2();
break;
case wasm::kExprF64Mod:
return BuildF64Mod(left, right);
case wasm::kExprRefEq:
return gasm_->TaggedEqual(left, right);
case wasm::kExprI32AsmjsDivS:
return BuildI32AsmjsDivS(left, right);
case wasm::kExprI32AsmjsDivU:
return BuildI32AsmjsDivU(left, right);
case wasm::kExprI32AsmjsRemS:
return BuildI32AsmjsRemS(left, right);
case wasm::kExprI32AsmjsRemU:
return BuildI32AsmjsRemU(left, right);
case wasm::kExprI32AsmjsStoreMem8:
return BuildAsmjsStoreMem(MachineType::Int8(), left, right);
case wasm::kExprI32AsmjsStoreMem16:
return BuildAsmjsStoreMem(MachineType::Int16(), left, right);
case wasm::kExprI32AsmjsStoreMem:
return BuildAsmjsStoreMem(MachineType::Int32(), left, right);
case wasm::kExprF32AsmjsStoreMem:
return BuildAsmjsStoreMem(MachineType::Float32(), left, right);
case wasm::kExprF64AsmjsStoreMem:
return BuildAsmjsStoreMem(MachineType::Float64(), left, right);
default:
FATAL_UNSUPPORTED_OPCODE(opcode);
}
return graph()->NewNode(op, left, right);
}
Node* WasmGraphBuilder::Unop(wasm::WasmOpcode opcode, Node* input,
wasm::WasmCodePosition position) {
const Operator* op;
MachineOperatorBuilder* m = mcgraph()->machine();
switch (opcode) {
case wasm::kExprI32Eqz:
op = m->Word32Equal();
return graph()->NewNode(op, input, mcgraph()->Int32Constant(0));
case wasm::kExprF32Abs:
op = m->Float32Abs();
break;
case wasm::kExprF32Neg: {
op = m->Float32Neg();
break;
}
case wasm::kExprF32Sqrt:
op = m->Float32Sqrt();
break;
case wasm::kExprF64Abs:
op = m->Float64Abs();
break;
case wasm::kExprF64Neg: {
op = m->Float64Neg();
break;
}
case wasm::kExprF64Sqrt:
op = m->Float64Sqrt();
break;
case wasm::kExprI32SConvertF32:
case wasm::kExprI32UConvertF32:
case wasm::kExprI32SConvertF64:
case wasm::kExprI32UConvertF64:
case wasm::kExprI32SConvertSatF64:
case wasm::kExprI32UConvertSatF64:
case wasm::kExprI32SConvertSatF32:
case wasm::kExprI32UConvertSatF32:
return BuildIntConvertFloat(input, position, opcode);
case wasm::kExprI32AsmjsSConvertF64:
return BuildI32AsmjsSConvertF64(input);
case wasm::kExprI32AsmjsUConvertF64:
return BuildI32AsmjsUConvertF64(input);
case wasm::kExprF32ConvertF64:
op = m->TruncateFloat64ToFloat32();
break;
case wasm::kExprF64SConvertI32:
op = m->ChangeInt32ToFloat64();
break;
case wasm::kExprF64UConvertI32:
op = m->ChangeUint32ToFloat64();
break;
case wasm::kExprF32SConvertI32:
op = m->RoundInt32ToFloat32();
break;
case wasm::kExprF32UConvertI32:
op = m->RoundUint32ToFloat32();
break;
case wasm::kExprI32AsmjsSConvertF32:
return BuildI32AsmjsSConvertF32(input);
case wasm::kExprI32AsmjsUConvertF32:
return BuildI32AsmjsUConvertF32(input);
case wasm::kExprF64ConvertF32:
op = m->ChangeFloat32ToFloat64();
break;
case wasm::kExprF32ReinterpretI32:
op = m->BitcastInt32ToFloat32();
break;
case wasm::kExprI32ReinterpretF32:
op = m->BitcastFloat32ToInt32();
break;
case wasm::kExprI32Clz:
op = m->Word32Clz();
break;
case wasm::kExprI32Ctz: {
if (m->Word32Ctz().IsSupported()) {
op = m->Word32Ctz().op();
break;
} else if (m->Word32ReverseBits().IsSupported()) {
Node* reversed = graph()->NewNode(m->Word32ReverseBits().op(), input);
Node* result = graph()->NewNode(m->Word32Clz(), reversed);
return result;
} else {
return BuildI32Ctz(input);
}
}
case wasm::kExprI32Popcnt: {
if (m->Word32Popcnt().IsSupported()) {
op = m->Word32Popcnt().op();
break;
} else {
return BuildI32Popcnt(input);
}
}
case wasm::kExprF32Floor: {
if (!m->Float32RoundDown().IsSupported()) return BuildF32Floor(input);
op = m->Float32RoundDown().op();
break;
}
case wasm::kExprF32Ceil: {
if (!m->Float32RoundUp().IsSupported()) return BuildF32Ceil(input);
op = m->Float32RoundUp().op();
break;
}
case wasm::kExprF32Trunc: {
if (!m->Float32RoundTruncate().IsSupported()) return BuildF32Trunc(input);
op = m->Float32RoundTruncate().op();
break;
}
case wasm::kExprF32NearestInt: {
if (!m->Float32RoundTiesEven().IsSupported())
return BuildF32NearestInt(input);
op = m->Float32RoundTiesEven().op();
break;
}
case wasm::kExprF64Floor: {
if (!m->Float64RoundDown().IsSupported()) return BuildF64Floor(input);
op = m->Float64RoundDown().op();
break;
}
case wasm::kExprF64Ceil: {
if (!m->Float64RoundUp().IsSupported()) return BuildF64Ceil(input);
op = m->Float64RoundUp().op();
break;
}
case wasm::kExprF64Trunc: {
if (!m->Float64RoundTruncate().IsSupported()) return BuildF64Trunc(input);
op = m->Float64RoundTruncate().op();
break;
}
case wasm::kExprF64NearestInt: {
if (!m->Float64RoundTiesEven().IsSupported())
return BuildF64NearestInt(input);
op = m->Float64RoundTiesEven().op();
break;
}
case wasm::kExprF64Acos: {
return BuildF64Acos(input);
}
case wasm::kExprF64Asin: {
return BuildF64Asin(input);
}
case wasm::kExprF64Atan:
op = m->Float64Atan();
break;
case wasm::kExprF64Cos: {
op = m->Float64Cos();
break;
}
case wasm::kExprF64Sin: {
op = m->Float64Sin();
break;
}
case wasm::kExprF64Tan: {
op = m->Float64Tan();
break;
}
case wasm::kExprF64Exp: {
op = m->Float64Exp();
break;
}
case wasm::kExprF64Log:
op = m->Float64Log();
break;
case wasm::kExprI32ConvertI64:
op = m->TruncateInt64ToInt32();
break;
case wasm::kExprI64SConvertI32:
op = m->ChangeInt32ToInt64();
break;
case wasm::kExprI64UConvertI32:
op = m->ChangeUint32ToUint64();
break;
case wasm::kExprF64ReinterpretI64:
op = m->BitcastInt64ToFloat64();
break;
case wasm::kExprI64ReinterpretF64:
op = m->BitcastFloat64ToInt64();
break;
case wasm::kExprI64Clz:
op = m->Word64Clz();
break;
case wasm::kExprI64Ctz: {
OptionalOperator ctz64 = m->Word64Ctz();
if (ctz64.IsSupported()) {
op = ctz64.op();
break;
} else if (m->Is32() && m->Word32Ctz().IsSupported()) {
op = ctz64.placeholder();
break;
} else if (m->Word64ReverseBits().IsSupported()) {
Node* reversed = graph()->NewNode(m->Word64ReverseBits().op(), input);
Node* result = graph()->NewNode(m->Word64Clz(), reversed);
return result;
} else {
return BuildI64Ctz(input);
}
}
case wasm::kExprI64Popcnt: {
OptionalOperator popcnt64 = m->Word64Popcnt();
if (popcnt64.IsSupported()) {
op = popcnt64.op();
} else if (m->Is32() && m->Word32Popcnt().IsSupported()) {
op = popcnt64.placeholder();
} else {
return BuildI64Popcnt(input);
}
break;
}
case wasm::kExprI64Eqz:
op = m->Word64Equal();
return graph()->NewNode(op, input, mcgraph()->Int64Constant(0));
case wasm::kExprF32SConvertI64:
if (m->Is32()) {
return BuildF32SConvertI64(input);
}
op = m->RoundInt64ToFloat32();
break;
case wasm::kExprF32UConvertI64:
if (m->Is32()) {
return BuildF32UConvertI64(input);
}
op = m->RoundUint64ToFloat32();
break;
case wasm::kExprF64SConvertI64:
if (m->Is32()) {
return BuildF64SConvertI64(input);
}
op = m->RoundInt64ToFloat64();
break;
case wasm::kExprF64UConvertI64:
if (m->Is32()) {
return BuildF64UConvertI64(input);
}
op = m->RoundUint64ToFloat64();
break;
case wasm::kExprI32SExtendI8:
op = m->SignExtendWord8ToInt32();
break;
case wasm::kExprI32SExtendI16:
op = m->SignExtendWord16ToInt32();
break;
case wasm::kExprI64SExtendI8:
op = m->SignExtendWord8ToInt64();
break;
case wasm::kExprI64SExtendI16:
op = m->SignExtendWord16ToInt64();
break;
case wasm::kExprI64SExtendI32:
op = m->SignExtendWord32ToInt64();
break;
case wasm::kExprI64SConvertF32:
case wasm::kExprI64UConvertF32:
case wasm::kExprI64SConvertF64:
case wasm::kExprI64UConvertF64:
case wasm::kExprI64SConvertSatF32:
case wasm::kExprI64UConvertSatF32:
case wasm::kExprI64SConvertSatF64:
case wasm::kExprI64UConvertSatF64:
return mcgraph()->machine()->Is32()
? BuildCcallConvertFloat(input, position, opcode)
: BuildIntConvertFloat(input, position, opcode);
case wasm::kExprRefIsNull:
return graph()->NewNode(m->WordEqual(), input, RefNull());
case wasm::kExprI32AsmjsLoadMem8S:
return BuildAsmjsLoadMem(MachineType::Int8(), input);
case wasm::kExprI32AsmjsLoadMem8U:
return BuildAsmjsLoadMem(MachineType::Uint8(), input);
case wasm::kExprI32AsmjsLoadMem16S:
return BuildAsmjsLoadMem(MachineType::Int16(), input);
case wasm::kExprI32AsmjsLoadMem16U:
return BuildAsmjsLoadMem(MachineType::Uint16(), input);
case wasm::kExprI32AsmjsLoadMem:
return BuildAsmjsLoadMem(MachineType::Int32(), input);
case wasm::kExprF32AsmjsLoadMem:
return BuildAsmjsLoadMem(MachineType::Float32(), input);
case wasm::kExprF64AsmjsLoadMem:
return BuildAsmjsLoadMem(MachineType::Float64(), input);
default:
FATAL_UNSUPPORTED_OPCODE(opcode);
}
return graph()->NewNode(op, input);
}
Node* WasmGraphBuilder::Float32Constant(float value) {
return mcgraph()->Float32Constant(value);
}
Node* WasmGraphBuilder::Float64Constant(double value) {
return mcgraph()->Float64Constant(value);
}
Node* WasmGraphBuilder::Simd128Constant(const uint8_t value[16]) {
has_simd_ = true;
return graph()->NewNode(mcgraph()->machine()->S128Const(value));
}
namespace {
Node* Branch(MachineGraph* mcgraph, Node* cond, Node** true_node,
Node** false_node, Node* control, BranchHint hint) {
DCHECK_NOT_NULL(cond);
DCHECK_NOT_NULL(control);
Node* branch =
mcgraph->graph()->NewNode(mcgraph->common()->Branch(hint), cond, control);
*true_node = mcgraph->graph()->NewNode(mcgraph->common()->IfTrue(), branch);
*false_node = mcgraph->graph()->NewNode(mcgraph->common()->IfFalse(), branch);
return branch;
}
} // namespace
Node* WasmGraphBuilder::BranchNoHint(Node* cond, Node** true_node,
Node** false_node) {
return Branch(mcgraph(), cond, true_node, false_node, control(),
BranchHint::kNone);
}
Node* WasmGraphBuilder::BranchExpectTrue(Node* cond, Node** true_node,
Node** false_node) {
return Branch(mcgraph(), cond, true_node, false_node, control(),
BranchHint::kTrue);
}
Node* WasmGraphBuilder::BranchExpectFalse(Node* cond, Node** true_node,
Node** false_node) {
return Branch(mcgraph(), cond, true_node, false_node, control(),
BranchHint::kFalse);
}
TrapId WasmGraphBuilder::GetTrapIdForTrap(wasm::TrapReason reason) {
// TODO(wasm): "!env_" should not happen when compiling an actual wasm
// function.
if (!env_ || !env_->runtime_exception_support) {
// We use TrapId::kInvalid as a marker to tell the code generator
// to generate a call to a testing c-function instead of a runtime
// stub. This code should only be called from a cctest.
return TrapId::kInvalid;
}
switch (reason) {
#define TRAPREASON_TO_TRAPID(name) \
case wasm::k##name: \
static_assert( \
static_cast<int>(TrapId::k##name) == wasm::WasmCode::kThrowWasm##name, \
"trap id mismatch"); \
return TrapId::k##name;
FOREACH_WASM_TRAPREASON(TRAPREASON_TO_TRAPID)
#undef TRAPREASON_TO_TRAPID
default:
UNREACHABLE();
}
}
Node* WasmGraphBuilder::TrapIfTrue(wasm::TrapReason reason, Node* cond,
wasm::WasmCodePosition position) {
TrapId trap_id = GetTrapIdForTrap(reason);
Node* node = SetControl(graph()->NewNode(mcgraph()->common()->TrapIf(trap_id),
cond, effect(), control()));
SetSourcePosition(node, position);
return node;
}
Node* WasmGraphBuilder::TrapIfFalse(wasm::TrapReason reason, Node* cond,
wasm::WasmCodePosition position) {
TrapId trap_id = GetTrapIdForTrap(reason);
Node* node = SetControl(graph()->NewNode(
mcgraph()->common()->TrapUnless(trap_id), cond, effect(), control()));
SetSourcePosition(node, position);
return node;
}
// Add a check that traps if {node} is equal to {val}.
Node* WasmGraphBuilder::TrapIfEq32(wasm::TrapReason reason, Node* node,
int32_t val,
wasm::WasmCodePosition position) {
Int32Matcher m(node);
if (m.HasResolvedValue() && !m.Is(val)) return graph()->start();
if (val == 0) {
return TrapIfFalse(reason, node, position);
} else {
return TrapIfTrue(reason,
graph()->NewNode(mcgraph()->machine()->Word32Equal(),
node, mcgraph()->Int32Constant(val)),
position);
}
}
// Add a check that traps if {node} is zero.
Node* WasmGraphBuilder::ZeroCheck32(wasm::TrapReason reason, Node* node,
wasm::WasmCodePosition position) {
return TrapIfEq32(reason, node, 0, position);
}
// Add a check that traps if {node} is equal to {val}.
Node* WasmGraphBuilder::TrapIfEq64(wasm::TrapReason reason, Node* node,
int64_t val,
wasm::WasmCodePosition position) {
Int64Matcher m(node);
if (m.HasResolvedValue() && !m.Is(val)) return graph()->start();
return TrapIfTrue(reason,
graph()->NewNode(mcgraph()->machine()->Word64Equal(), node,
mcgraph()->Int64Constant(val)),
position);
}
// Add a check that traps if {node} is zero.
Node* WasmGraphBuilder::ZeroCheck64(wasm::TrapReason reason, Node* node,
wasm::WasmCodePosition position) {
return TrapIfEq64(reason, node, 0, position);
}
Node* WasmGraphBuilder::Switch(unsigned count, Node* key) {
// The instruction selector will use {kArchTableSwitch} for large switches,
// which has limited input count, see {InstructionSelector::EmitTableSwitch}.
DCHECK_LE(count, Instruction::kMaxInputCount - 2); // value_range + 2
DCHECK_LE(count, wasm::kV8MaxWasmFunctionBrTableSize + 1); // plus IfDefault
return graph()->NewNode(mcgraph()->common()->Switch(count), key, control());
}
Node* WasmGraphBuilder::IfValue(int32_t value, Node* sw) {
DCHECK_EQ(IrOpcode::kSwitch, sw->opcode());
return graph()->NewNode(mcgraph()->common()->IfValue(value), sw);
}
Node* WasmGraphBuilder::IfDefault(Node* sw) {
DCHECK_EQ(IrOpcode::kSwitch, sw->opcode());
return graph()->NewNode(mcgraph()->common()->IfDefault(), sw);
}
Node* WasmGraphBuilder::Return(Vector<Node*> vals) {
unsigned count = static_cast<unsigned>(vals.size());
base::SmallVector<Node*, 8> buf(count + 3);
buf[0] = mcgraph()->Int32Constant(0);
if (count > 0) {
memcpy(buf.data() + 1, vals.begin(), sizeof(void*) * count);
}
buf[count + 1] = effect();
buf[count + 2] = control();
Node* ret = graph()->NewNode(mcgraph()->common()->Return(count), count + 3,
buf.data());
MergeControlToEnd(mcgraph(), ret);
return ret;
}
Node* WasmGraphBuilder::Trap(wasm::TrapReason reason,
wasm::WasmCodePosition position) {
TrapIfFalse(reason, Int32Constant(0), position);
Return(Vector<Node*>{});
return nullptr;
}
Node* WasmGraphBuilder::MaskShiftCount32(Node* node) {
static const int32_t kMask32 = 0x1F;
if (!mcgraph()->machine()->Word32ShiftIsSafe()) {
// Shifts by constants are so common we pattern-match them here.
Int32Matcher match(node);
if (match.HasResolvedValue()) {
int32_t masked = (match.ResolvedValue() & kMask32);
if (match.ResolvedValue() != masked)
node = mcgraph()->Int32Constant(masked);
} else {
node = graph()->NewNode(mcgraph()->machine()->Word32And(), node,
mcgraph()->Int32Constant(kMask32));
}
}
return node;
}
Node* WasmGraphBuilder::MaskShiftCount64(Node* node) {
static const int64_t kMask64 = 0x3F;
if (!mcgraph()->machine()->Word32ShiftIsSafe()) {
// Shifts by constants are so common we pattern-match them here.
Int64Matcher match(node);
if (match.HasResolvedValue()) {
int64_t masked = (match.ResolvedValue() & kMask64);
if (match.ResolvedValue() != masked)
node = mcgraph()->Int64Constant(masked);
} else {
node = graph()->NewNode(mcgraph()->machine()->Word64And(), node,
mcgraph()->Int64Constant(kMask64));
}
}
return node;
}
namespace {
bool ReverseBytesSupported(MachineOperatorBuilder* m, size_t size_in_bytes) {
switch (size_in_bytes) {
case 4:
case 16:
return true;
case 8:
return m->Is64();
default:
break;
}
return false;
}
} // namespace
Node* WasmGraphBuilder::BuildChangeEndiannessStore(
Node* node, MachineRepresentation mem_rep, wasm::ValueType wasmtype) {
Node* result;
Node* value = node;
MachineOperatorBuilder* m = mcgraph()->machine();
int valueSizeInBytes = wasmtype.element_size_bytes();
int valueSizeInBits = 8 * valueSizeInBytes;
bool isFloat = false;
switch (wasmtype.kind()) {
case wasm::ValueType::kF64:
value = graph()->NewNode(m->BitcastFloat64ToInt64(), node);
isFloat = true;
V8_FALLTHROUGH;
case wasm::ValueType::kI64:
result = mcgraph()->Int64Constant(0);
break;
case wasm::ValueType::kF32:
value = graph()->NewNode(m->BitcastFloat32ToInt32(), node);
isFloat = true;
V8_FALLTHROUGH;
case wasm::ValueType::kI32:
result = mcgraph()->Int32Constant(0);
break;
case wasm::ValueType::kS128:
DCHECK(ReverseBytesSupported(m, valueSizeInBytes));
break;
default:
UNREACHABLE();
}
if (mem_rep == MachineRepresentation::kWord8) {
// No need to change endianness for byte size, return original node
return node;
}
if (wasmtype == wasm::kWasmI64 && mem_rep < MachineRepresentation::kWord64) {
// In case we store lower part of WasmI64 expression, we can truncate
// upper 32bits
value = graph()->NewNode(m->TruncateInt64ToInt32(), value);
valueSizeInBytes = wasm::kWasmI32.element_size_bytes();
valueSizeInBits = 8 * valueSizeInBytes;
if (mem_rep == MachineRepresentation::kWord16) {
value =
graph()->NewNode(m->Word32Shl(), value, mcgraph()->Int32Constant(16));
}
} else if (wasmtype == wasm::kWasmI32 &&
mem_rep == MachineRepresentation::kWord16) {
value =
graph()->NewNode(m->Word32Shl(), value, mcgraph()->Int32Constant(16));
}
int i;
uint32_t shiftCount;
if (ReverseBytesSupported(m, valueSizeInBytes)) {
switch (valueSizeInBytes) {
case 4:
result = graph()->NewNode(m->Word32ReverseBytes(), value);
break;
case 8:
result = graph()->NewNode(m->Word64ReverseBytes(), value);
break;
case 16:
result = graph()->NewNode(m->Simd128ReverseBytes(), value);
break;
default:
UNREACHABLE();
break;
}
} else {
for (i = 0, shiftCount = valueSizeInBits - 8; i < valueSizeInBits / 2;
i += 8, shiftCount -= 16) {
Node* shiftLower;
Node* shiftHigher;
Node* lowerByte;
Node* higherByte;
DCHECK_LT(0, shiftCount);
DCHECK_EQ(0, (shiftCount + 8) % 16);
if (valueSizeInBits > 32) {
shiftLower = graph()->NewNode(m->Word64Shl(), value,
mcgraph()->Int64Constant(shiftCount));
shiftHigher = graph()->NewNode(m->Word64Shr(), value,
mcgraph()->Int64Constant(shiftCount));
lowerByte = graph()->NewNode(
m->Word64And(), shiftLower,
mcgraph()->Int64Constant(static_cast<uint64_t>(0xFF)
<< (valueSizeInBits - 8 - i)));
higherByte = graph()->NewNode(
m->Word64And(), shiftHigher,
mcgraph()->Int64Constant(static_cast<uint64_t>(0xFF) << i));
result = graph()->NewNode(m->Word64Or(), result, lowerByte);
result = graph()->NewNode(m->Word64Or(), result, higherByte);
} else {
shiftLower = graph()->NewNode(m->Word32Shl(), value,
mcgraph()->Int32Constant(shiftCount));
shiftHigher = graph()->NewNode(m->Word32Shr(), value,
mcgraph()->Int32Constant(shiftCount));
lowerByte = graph()->NewNode(
m->Word32And(), shiftLower,
mcgraph()->Int32Constant(static_cast<uint32_t>(0xFF)
<< (valueSizeInBits - 8 - i)));
higherByte = graph()->NewNode(
m->Word32And(), shiftHigher,
mcgraph()->Int32Constant(static_cast<uint32_t>(0xFF) << i));
result = graph()->NewNode(m->Word32Or(), result, lowerByte);
result = graph()->NewNode(m->Word32Or(), result, higherByte);
}
}
}
if (isFloat) {
switch (wasmtype.kind()) {
case wasm::ValueType::kF64:
result = graph()->NewNode(m->BitcastInt64ToFloat64(), result);
break;
case wasm::ValueType::kF32:
result = graph()->NewNode(m->BitcastInt32ToFloat32(), result);
break;
default:
UNREACHABLE();
break;
}
}
return result;
}
Node* WasmGraphBuilder::BuildChangeEndiannessLoad(Node* node,
MachineType memtype,
wasm::ValueType wasmtype) {
Node* result;
Node* value = node;
MachineOperatorBuilder* m = mcgraph()->machine();
int valueSizeInBytes = ElementSizeInBytes(memtype.representation());
int valueSizeInBits = 8 * valueSizeInBytes;
bool isFloat = false;
switch (memtype.representation()) {
case MachineRepresentation::kFloat64:
value = graph()->NewNode(m->BitcastFloat64ToInt64(), node);
isFloat = true;
V8_FALLTHROUGH;
case MachineRepresentation::kWord64:
result = mcgraph()->Int64Constant(0);
break;
case MachineRepresentation::kFloat32:
value = graph()->NewNode(m->BitcastFloat32ToInt32(), node);
isFloat = true;
V8_FALLTHROUGH;
case MachineRepresentation::kWord32:
case MachineRepresentation::kWord16:
result = mcgraph()->Int32Constant(0);
break;
case MachineRepresentation::kWord8:
// No need to change endianness for byte size, return original node
return node;
break;
case MachineRepresentation::kSimd128:
DCHECK(ReverseBytesSupported(m, valueSizeInBytes));
break;
default:
UNREACHABLE();
}
int i;
uint32_t shiftCount;
if (ReverseBytesSupported(m, valueSizeInBytes < 4 ? 4 : valueSizeInBytes)) {
switch (valueSizeInBytes) {
case 2:
result =
graph()->NewNode(m->Word32ReverseBytes(),
graph()->NewNode(m->Word32Shl(), value,
mcgraph()->Int32Constant(16)));
break;
case 4:
result = graph()->NewNode(m->Word32ReverseBytes(), value);
break;
case 8:
result = graph()->NewNode(m->Word64ReverseBytes(), value);
break;
case 16:
result = graph()->NewNode(m->Simd128ReverseBytes(), value);
break;
default:
UNREACHABLE();
}
} else {
for (i = 0, shiftCount = valueSizeInBits - 8; i < valueSizeInBits / 2;
i += 8, shiftCount -= 16) {
Node* shiftLower;
Node* shiftHigher;
Node* lowerByte;
Node* higherByte;
DCHECK_LT(0, shiftCount);
DCHECK_EQ(0, (shiftCount + 8) % 16);
if (valueSizeInBits > 32) {
shiftLower = graph()->NewNode(m->Word64Shl(), value,
mcgraph()->Int64Constant(shiftCount));
shiftHigher = graph()->NewNode(m->Word64Shr(), value,
mcgraph()->Int64Constant(shiftCount));
lowerByte = graph()->NewNode(
m->Word64And(), shiftLower,
mcgraph()->Int64Constant(static_cast<uint64_t>(0xFF)
<< (valueSizeInBits - 8 - i)));
higherByte = graph()->NewNode(
m->Word64And(), shiftHigher,
mcgraph()->Int64Constant(static_cast<uint64_t>(0xFF) << i));
result = graph()->NewNode(m->Word64Or(), result, lowerByte);
result = graph()->NewNode(m->Word64Or(), result, higherByte);
} else {
shiftLower = graph()->NewNode(m->Word32Shl(), value,
mcgraph()->Int32Constant(shiftCount));
shiftHigher = graph()->NewNode(m->Word32Shr(), value,
mcgraph()->Int32Constant(shiftCount));
lowerByte = graph()->NewNode(
m->Word32And(), shiftLower,
mcgraph()->Int32Constant(static_cast<uint32_t>(0xFF)
<< (valueSizeInBits - 8 - i)));
higherByte = graph()->NewNode(
m->Word32And(), shiftHigher,
mcgraph()->Int32Constant(static_cast<uint32_t>(0xFF) << i));
result = graph()->NewNode(m->Word32Or(), result, lowerByte);
result = graph()->NewNode(m->Word32Or(), result, higherByte);
}
}
}
if (isFloat) {
switch (memtype.representation()) {
case MachineRepresentation::kFloat64:
result = graph()->NewNode(m->BitcastInt64ToFloat64(), result);
break;
case MachineRepresentation::kFloat32:
result = graph()->NewNode(m->BitcastInt32ToFloat32(), result);
break;
default:
UNREACHABLE();
break;
}
}
// We need to sign extend the value
if (memtype.IsSigned()) {
DCHECK(!isFloat);
if (valueSizeInBits < 32) {
Node* shiftBitCount;
// Perform sign extension using following trick
// result = (x << machine_width - type_width) >> (machine_width -
// type_width)
if (wasmtype == wasm::kWasmI64) {
shiftBitCount = mcgraph()->Int32Constant(64 - valueSizeInBits);
result = graph()->NewNode(
m->Word64Sar(),
graph()->NewNode(m->Word64Shl(),
graph()->NewNode(m->ChangeInt32ToInt64(), result),
shiftBitCount),
shiftBitCount);
} else if (wasmtype == wasm::kWasmI32) {
shiftBitCount = mcgraph()->Int32Constant(32 - valueSizeInBits);
result = graph()->NewNode(
m->Word32Sar(),
graph()->NewNode(m->Word32Shl(), result, shiftBitCount),
shiftBitCount);
}
}
}
return result;
}
Node* WasmGraphBuilder::BuildF32CopySign(Node* left, Node* right) {
Node* result = Unop(
wasm::kExprF32ReinterpretI32,
Binop(wasm::kExprI32Ior,
Binop(wasm::kExprI32And, Unop(wasm::kExprI32ReinterpretF32, left),
mcgraph()->Int32Constant(0x7FFFFFFF)),
Binop(wasm::kExprI32And, Unop(wasm::kExprI32ReinterpretF32, right),
mcgraph()->Int32Constant(0x80000000))));
return result;
}
Node* WasmGraphBuilder::BuildF64CopySign(Node* left, Node* right) {
if (mcgraph()->machine()->Is64()) {
return gasm_->BitcastInt64ToFloat64(gasm_->Word64Or(
gasm_->Word64And(gasm_->BitcastFloat64ToInt64(left),
gasm_->Int64Constant(0x7FFFFFFFFFFFFFFF)),
gasm_->Word64And(gasm_->BitcastFloat64ToInt64(right),
gasm_->Int64Constant(0x8000000000000000))));
}
DCHECK(mcgraph()->machine()->Is32());
Node* high_word_left = gasm_->Float64ExtractHighWord32(left);
Node* high_word_right = gasm_->Float64ExtractHighWord32(right);
Node* new_high_word = gasm_->Word32Or(
gasm_->Word32And(high_word_left, gasm_->Int32Constant(0x7FFFFFFF)),
gasm_->Word32And(high_word_right, gasm_->Int32Constant(0x80000000)));
return gasm_->Float64InsertHighWord32(left, new_high_word);
}
namespace {
MachineType IntConvertType(wasm::WasmOpcode opcode) {
switch (opcode) {
case wasm::kExprI32SConvertF32:
case wasm::kExprI32SConvertF64:
case wasm::kExprI32SConvertSatF32:
case wasm::kExprI32SConvertSatF64:
return MachineType::Int32();
case wasm::kExprI32UConvertF32:
case wasm::kExprI32UConvertF64:
case wasm::kExprI32UConvertSatF32:
case wasm::kExprI32UConvertSatF64:
return MachineType::Uint32();
case wasm::kExprI64SConvertF32:
case wasm::kExprI64SConvertF64:
case wasm::kExprI64SConvertSatF32:
case wasm::kExprI64SConvertSatF64:
return MachineType::Int64();
case wasm::kExprI64UConvertF32:
case wasm::kExprI64UConvertF64:
case wasm::kExprI64UConvertSatF32:
case wasm::kExprI64UConvertSatF64:
return MachineType::Uint64();
default:
UNREACHABLE();
}
}
MachineType FloatConvertType(wasm::WasmOpcode opcode) {
switch (opcode) {
case wasm::kExprI32SConvertF32:
case wasm::kExprI32UConvertF32:
case wasm::kExprI32SConvertSatF32:
case wasm::kExprI64SConvertF32:
case wasm::kExprI64UConvertF32:
case wasm::kExprI32UConvertSatF32:
case wasm::kExprI64SConvertSatF32:
case wasm::kExprI64UConvertSatF32:
return MachineType::Float32();
case wasm::kExprI32SConvertF64:
case wasm::kExprI32UConvertF64:
case wasm::kExprI64SConvertF64:
case wasm::kExprI64UConvertF64:
case wasm::kExprI32SConvertSatF64:
case wasm::kExprI32UConvertSatF64:
case wasm::kExprI64SConvertSatF64:
case wasm::kExprI64UConvertSatF64:
return MachineType::Float64();
default:
UNREACHABLE();
}
}
const Operator* ConvertOp(WasmGraphBuilder* builder, wasm::WasmOpcode opcode) {
switch (opcode) {
case wasm::kExprI32SConvertF32:
return builder->mcgraph()->machine()->TruncateFloat32ToInt32(
TruncateKind::kSetOverflowToMin);
case wasm::kExprI32SConvertSatF32:
return builder->mcgraph()->machine()->TruncateFloat32ToInt32(
TruncateKind::kArchitectureDefault);
case wasm::kExprI32UConvertF32:
return builder->mcgraph()->machine()->TruncateFloat32ToUint32(
TruncateKind::kSetOverflowToMin);
case wasm::kExprI32UConvertSatF32:
return builder->mcgraph()->machine()->TruncateFloat32ToUint32(
TruncateKind::kArchitectureDefault);
case wasm::kExprI32SConvertF64:
case wasm::kExprI32SConvertSatF64:
return builder->mcgraph()->machine()->ChangeFloat64ToInt32();
case wasm::kExprI32UConvertF64:
case wasm::kExprI32UConvertSatF64:
return builder->mcgraph()->machine()->TruncateFloat64ToUint32();
case wasm::kExprI64SConvertF32:
case wasm::kExprI64SConvertSatF32:
return builder->mcgraph()->machine()->TryTruncateFloat32ToInt64();
case wasm::kExprI64UConvertF32:
case wasm::kExprI64UConvertSatF32:
return builder->mcgraph()->machine()->TryTruncateFloat32ToUint64();
case wasm::kExprI64SConvertF64:
case wasm::kExprI64SConvertSatF64:
return builder->mcgraph()->machine()->TryTruncateFloat64ToInt64();
case wasm::kExprI64UConvertF64:
case wasm::kExprI64UConvertSatF64:
return builder->mcgraph()->machine()->TryTruncateFloat64ToUint64();
default:
UNREACHABLE();
}
}
wasm::WasmOpcode ConvertBackOp(wasm::WasmOpcode opcode) {
switch (opcode) {
case wasm::kExprI32SConvertF32:
case wasm::kExprI32SConvertSatF32:
return wasm::kExprF32SConvertI32;
case wasm::kExprI32UConvertF32:
case wasm::kExprI32UConvertSatF32:
return wasm::kExprF32UConvertI32;
case wasm::kExprI32SConvertF64:
case wasm::kExprI32SConvertSatF64:
return wasm::kExprF64SConvertI32;
case wasm::kExprI32UConvertF64:
case wasm::kExprI32UConvertSatF64:
return wasm::kExprF64UConvertI32;
default:
UNREACHABLE();
}
}
bool IsTrappingConvertOp(wasm::WasmOpcode opcode) {
switch (opcode) {
case wasm::kExprI32SConvertF32:
case wasm::kExprI32UConvertF32:
case wasm::kExprI32SConvertF64:
case wasm::kExprI32UConvertF64:
case wasm::kExprI64SConvertF32:
case wasm::kExprI64UConvertF32:
case wasm::kExprI64SConvertF64:
case wasm::kExprI64UConvertF64:
return true;
case wasm::kExprI32SConvertSatF64:
case wasm::kExprI32UConvertSatF64:
case wasm::kExprI32SConvertSatF32:
case wasm::kExprI32UConvertSatF32:
case wasm::kExprI64SConvertSatF32:
case wasm::kExprI64UConvertSatF32:
case wasm::kExprI64SConvertSatF64:
case wasm::kExprI64UConvertSatF64:
return false;
default:
UNREACHABLE();
}
}
Node* Zero(WasmGraphBuilder* builder, const MachineType& ty) {
switch (ty.representation()) {
case MachineRepresentation::kWord32:
return builder->Int32Constant(0);
case MachineRepresentation::kWord64:
return builder->Int64Constant(0);
case MachineRepresentation::kFloat32:
return builder->Float32Constant(0.0);
case MachineRepresentation::kFloat64:
return builder->Float64Constant(0.0);
default:
UNREACHABLE();
}
}
Node* Min(WasmGraphBuilder* builder, const MachineType& ty) {
switch (ty.semantic()) {
case MachineSemantic::kInt32:
return builder->Int32Constant(std::numeric_limits<int32_t>::min());
case MachineSemantic::kUint32:
return builder->Int32Constant(std::numeric_limits<uint32_t>::min());
case MachineSemantic::kInt64:
return builder->Int64Constant(std::numeric_limits<int64_t>::min());
case MachineSemantic::kUint64:
return builder->Int64Constant(std::numeric_limits<uint64_t>::min());
default:
UNREACHABLE();
}
}
Node* Max(WasmGraphBuilder* builder, const MachineType& ty) {
switch (ty.semantic()) {
case MachineSemantic::kInt32:
return builder->Int32Constant(std::numeric_limits<int32_t>::max());
case MachineSemantic::kUint32:
return builder->Int32Constant(std::numeric_limits<uint32_t>::max());
case MachineSemantic::kInt64:
return builder->Int64Constant(std::numeric_limits<int64_t>::max());
case MachineSemantic::kUint64:
return builder->Int64Constant(std::numeric_limits<uint64_t>::max());
default:
UNREACHABLE();
}
}
wasm::WasmOpcode TruncOp(const MachineType& ty) {
switch (ty.representation()) {
case MachineRepresentation::kFloat32:
return wasm::kExprF32Trunc;
case MachineRepresentation::kFloat64:
return wasm::kExprF64Trunc;
default:
UNREACHABLE();
}
}
wasm::WasmOpcode NeOp(const MachineType& ty) {
switch (ty.representation()) {
case MachineRepresentation::kFloat32:
return wasm::kExprF32Ne;
case MachineRepresentation::kFloat64:
return wasm::kExprF64Ne;
default:
UNREACHABLE();
}
}
wasm::WasmOpcode LtOp(const MachineType& ty) {
switch (ty.representation()) {
case MachineRepresentation::kFloat32:
return wasm::kExprF32Lt;
case MachineRepresentation::kFloat64:
return wasm::kExprF64Lt;
default:
UNREACHABLE();
}
}
Node* ConvertTrapTest(WasmGraphBuilder* builder, wasm::WasmOpcode opcode,
const MachineType& int_ty, const MachineType& float_ty,
Node* trunc, Node* converted_value) {
if (int_ty.representation() == MachineRepresentation::kWord32) {
Node* check = builder->Unop(ConvertBackOp(opcode), converted_value);
return builder->Binop(NeOp(float_ty), trunc, check);
}
return builder->graph()->NewNode(builder->mcgraph()->common()->Projection(1),
trunc, builder->graph()->start());
}
Node* ConvertSaturateTest(WasmGraphBuilder* builder, wasm::WasmOpcode opcode,
const MachineType& int_ty,
const MachineType& float_ty, Node* trunc,
Node* converted_value) {
Node* test = ConvertTrapTest(builder, opcode, int_ty, float_ty, trunc,
converted_value);
if (int_ty.representation() == MachineRepresentation::kWord64) {
test = builder->Binop(wasm::kExprI64Eq, test, builder->Int64Constant(0));
}
return test;
}
} // namespace
Node* WasmGraphBuilder::BuildIntConvertFloat(Node* input,
wasm::WasmCodePosition position,
wasm::WasmOpcode opcode) {
const MachineType int_ty = IntConvertType(opcode);
const MachineType float_ty = FloatConvertType(opcode);
const Operator* conv_op = ConvertOp(this, opcode);
Node* trunc = nullptr;
Node* converted_value = nullptr;
const bool is_int32 =
int_ty.representation() == MachineRepresentation::kWord32;
if (is_int32) {
trunc = Unop(TruncOp(float_ty), input);
converted_value = graph()->NewNode(conv_op, trunc);
} else {
trunc = graph()->NewNode(conv_op, input);
converted_value = graph()->NewNode(mcgraph()->common()->Projection(0),
trunc, graph()->start());
}
if (IsTrappingConvertOp(opcode)) {
Node* test =
ConvertTrapTest(this, opcode, int_ty, float_ty, trunc, converted_value);
if (is_int32) {
TrapIfTrue(wasm::kTrapFloatUnrepresentable, test, position);
} else {
ZeroCheck64(wasm::kTrapFloatUnrepresentable, test, position);
}
return converted_value;
}
if (mcgraph()->machine()->SatConversionIsSafe()) {
return converted_value;
}
Node* test = ConvertSaturateTest(this, opcode, int_ty, float_ty, trunc,
converted_value);
Diamond tl_d(graph(), mcgraph()->common(), test, BranchHint::kFalse);
tl_d.Chain(control());
Node* nan_test = Binop(NeOp(float_ty), input, input);
Diamond nan_d(graph(), mcgraph()->common(), nan_test, BranchHint::kFalse);
nan_d.Nest(tl_d, true);
Node* neg_test = Binop(LtOp(float_ty), input, Zero(this, float_ty));
Diamond sat_d(graph(), mcgraph()->common(), neg_test, BranchHint::kNone);
sat_d.Nest(nan_d, false);
Node* sat_val =
sat_d.Phi(int_ty.representation(), Min(this, int_ty), Max(this, int_ty));
Node* nan_val =
nan_d.Phi(int_ty.representation(), Zero(this, int_ty), sat_val);
return tl_d.Phi(int_ty.representation(), nan_val, converted_value);
}
Node* WasmGraphBuilder::BuildI32AsmjsSConvertF32(Node* input) {
MachineOperatorBuilder* m = mcgraph()->machine();
// asm.js must use the wacky JS semantics.
input = graph()->NewNode(m->ChangeFloat32ToFloat64(), input);
return graph()->NewNode(m->TruncateFloat64ToWord32(), input);
}
Node* WasmGraphBuilder::BuildI32AsmjsSConvertF64(Node* input) {
MachineOperatorBuilder* m = mcgraph()->machine();
// asm.js must use the wacky JS semantics.
return graph()->NewNode(m->TruncateFloat64ToWord32(), input);
}
Node* WasmGraphBuilder::BuildI32AsmjsUConvertF32(Node* input) {
MachineOperatorBuilder* m = mcgraph()->machine();
// asm.js must use the wacky JS semantics.
input = graph()->NewNode(m->ChangeFloat32ToFloat64(), input);
return graph()->NewNode(m->TruncateFloat64ToWord32(), input);
}
Node* WasmGraphBuilder::BuildI32AsmjsUConvertF64(Node* input) {
MachineOperatorBuilder* m = mcgraph()->machine();
// asm.js must use the wacky JS semantics.
return graph()->NewNode(m->TruncateFloat64ToWord32(), input);
}
Node* WasmGraphBuilder::BuildBitCountingCall(Node* input, ExternalReference ref,
MachineRepresentation input_type) {
Node* stack_slot_param = StoreArgsInStackSlot({{input_type, input}});
MachineType sig_types[] = {MachineType::Int32(), MachineType::Pointer()};
MachineSignature sig(1, 1, sig_types);
Node* function = graph()->NewNode(mcgraph()->common()->ExternalConstant(ref));
return BuildCCall(&sig, function, stack_slot_param);
}
Node* WasmGraphBuilder::BuildI32Ctz(Node* input) {
return BuildBitCountingCall(input, ExternalReference::wasm_word32_ctz(),
MachineRepresentation::kWord32);
}
Node* WasmGraphBuilder::BuildI64Ctz(Node* input) {
return Unop(wasm::kExprI64UConvertI32,
BuildBitCountingCall(input, ExternalReference::wasm_word64_ctz(),
MachineRepresentation::kWord64));
}
Node* WasmGraphBuilder::BuildI32Popcnt(Node* input) {
return BuildBitCountingCall(input, ExternalReference::wasm_word32_popcnt(),
MachineRepresentation::kWord32);
}
Node* WasmGraphBuilder::BuildI64Popcnt(Node* input) {
return Unop(
wasm::kExprI64UConvertI32,
BuildBitCountingCall(input, ExternalReference::wasm_word64_popcnt(),
MachineRepresentation::kWord64));
}
Node* WasmGraphBuilder::BuildF32Trunc(Node* input) {
MachineType type = MachineType::Float32();
ExternalReference ref = ExternalReference::wasm_f32_trunc();
return BuildCFuncInstruction(ref, type, input);
}
Node* WasmGraphBuilder::BuildF32Floor(Node* input) {
MachineType type = MachineType::Float32();
ExternalReference ref = ExternalReference::wasm_f32_floor();
return BuildCFuncInstruction(ref, type, input);
}
Node* WasmGraphBuilder::BuildF32Ceil(Node* input) {
MachineType type = MachineType::Float32();
ExternalReference ref = ExternalReference::wasm_f32_ceil();
return BuildCFuncInstruction(ref, type, input);
}
Node* WasmGraphBuilder::BuildF32NearestInt(Node* input) {
MachineType type = MachineType::Float32();
ExternalReference ref = ExternalReference::wasm_f32_nearest_int();
return BuildCFuncInstruction(ref, type, input);
}
Node* WasmGraphBuilder::BuildF64Trunc(Node* input) {
MachineType type = MachineType::Float64();
ExternalReference ref = ExternalReference::wasm_f64_trunc();
return BuildCFuncInstruction(ref, type, input);
}
Node* WasmGraphBuilder::BuildF64Floor(Node* input) {
MachineType type = MachineType::Float64();
ExternalReference ref = ExternalReference::wasm_f64_floor();
return BuildCFuncInstruction(ref, type, input);
}
Node* WasmGraphBuilder::BuildF64Ceil(Node* input) {
MachineType type = MachineType::Float64();
ExternalReference ref = ExternalReference::wasm_f64_ceil();
return BuildCFuncInstruction(ref, type, input);
}
Node* WasmGraphBuilder::BuildF64NearestInt(Node* input) {
MachineType type = MachineType::Float64();
ExternalReference ref = ExternalReference::wasm_f64_nearest_int();
return BuildCFuncInstruction(ref, type, input);
}
Node* WasmGraphBuilder::BuildF64Acos(Node* input) {
MachineType type = MachineType::Float64();
ExternalReference ref = ExternalReference::f64_acos_wrapper_function();
return BuildCFuncInstruction(ref, type, input);
}
Node* WasmGraphBuilder::BuildF64Asin(Node* input) {
MachineType type = MachineType::Float64();
ExternalReference ref = ExternalReference::f64_asin_wrapper_function();
return BuildCFuncInstruction(ref, type, input);
}
Node* WasmGraphBuilder::BuildF64Pow(Node* left, Node* right) {
MachineType type = MachineType::Float64();
ExternalReference ref = ExternalReference::wasm_float64_pow();
return BuildCFuncInstruction(ref, type, left, right);
}
Node* WasmGraphBuilder::BuildF64Mod(Node* left, Node* right) {
MachineType type = MachineType::Float64();
ExternalReference ref = ExternalReference::f64_mod_wrapper_function();
return BuildCFuncInstruction(ref, type, left, right);
}
Node* WasmGraphBuilder::BuildCFuncInstruction(ExternalReference ref,
MachineType type, Node* input0,
Node* input1) {
// We do truncation by calling a C function which calculates the result.
// The input is passed to the C function as a byte buffer holding the two
// input doubles. We reserve this byte buffer as a stack slot, store the
// parameters in this buffer slots, pass a pointer to the buffer to the C
// function, and after calling the C function we collect the return value from
// the buffer.
Node* stack_slot;
if (input1) {
stack_slot = StoreArgsInStackSlot(
{{type.representation(), input0}, {type.representation(), input1}});
} else {
stack_slot = StoreArgsInStackSlot({{type.representation(), input0}});
}
MachineType sig_types[] = {MachineType::Pointer()};
MachineSignature sig(0, 1, sig_types);
Node* function = graph()->NewNode(mcgraph()->common()->ExternalConstant(ref));
BuildCCall(&sig, function, stack_slot);
return SetEffect(graph()->NewNode(mcgraph()->machine()->Load(type),
stack_slot, mcgraph()->Int32Constant(0),
effect(), control()));
}
Node* WasmGraphBuilder::BuildF32SConvertI64(Node* input) {
// TODO(titzer/bradnelson): Check handlng of asm.js case.
return BuildIntToFloatConversionInstruction(
input, ExternalReference::wasm_int64_to_float32(),
MachineRepresentation::kWord64, MachineType::Float32());
}
Node* WasmGraphBuilder::BuildF32UConvertI64(Node* input) {
// TODO(titzer/bradnelson): Check handlng of asm.js case.
return BuildIntToFloatConversionInstruction(
input, ExternalReference::wasm_uint64_to_float32(),
MachineRepresentation::kWord64, MachineType::Float32());
}
Node* WasmGraphBuilder::BuildF64SConvertI64(Node* input) {
return BuildIntToFloatConversionInstruction(
input, ExternalReference::wasm_int64_to_float64(),
MachineRepresentation::kWord64, MachineType::Float64());
}
Node* WasmGraphBuilder::BuildF64UConvertI64(Node* input) {
return BuildIntToFloatConversionInstruction(
input, ExternalReference::wasm_uint64_to_float64(),
MachineRepresentation::kWord64, MachineType::Float64());
}
Node* WasmGraphBuilder::BuildIntToFloatConversionInstruction(
Node* input, ExternalReference ref,
MachineRepresentation parameter_representation,
const MachineType result_type) {
int stack_slot_size =
std::max(ElementSizeInBytes(parameter_representation),
ElementSizeInBytes(result_type.representation()));
Node* stack_slot =
graph()->NewNode(mcgraph()->machine()->StackSlot(stack_slot_size));
const Operator* store_op = mcgraph()->machine()->Store(
StoreRepresentation(parameter_representation, kNoWriteBarrier));
SetEffect(graph()->NewNode(store_op, stack_slot, mcgraph()->Int32Constant(0),
input, effect(), control()));
MachineType sig_types[] = {MachineType::Pointer()};
MachineSignature sig(0, 1, sig_types);
Node* function = graph()->NewNode(mcgraph()->common()->ExternalConstant(ref));
BuildCCall(&sig, function, stack_slot);
return SetEffect(graph()->NewNode(mcgraph()->machine()->Load(result_type),
stack_slot, mcgraph()->Int32Constant(0),
effect(), control()));
}
namespace {
ExternalReference convert_ccall_ref(WasmGraphBuilder* builder,
wasm::WasmOpcode opcode) {
switch (opcode) {
case wasm::kExprI64SConvertF32:
case wasm::kExprI64SConvertSatF32:
return ExternalReference::wasm_float32_to_int64();
case wasm::kExprI64UConvertF32:
case wasm::kExprI64UConvertSatF32:
return ExternalReference::wasm_float32_to_uint64();
case wasm::kExprI64SConvertF64:
case wasm::kExprI64SConvertSatF64:
return ExternalReference::wasm_float64_to_int64();
case wasm::kExprI64UConvertF64:
case wasm::kExprI64UConvertSatF64:
return ExternalReference::wasm_float64_to_uint64();
default:
UNREACHABLE();
}
}
} // namespace
Node* WasmGraphBuilder::BuildCcallConvertFloat(Node* input,
wasm::WasmCodePosition position,
wasm::WasmOpcode opcode) {
const MachineType int_ty = IntConvertType(opcode);
const MachineType float_ty = FloatConvertType(opcode);
ExternalReference call_ref = convert_ccall_ref(this, opcode);
int stack_slot_size = std::max(ElementSizeInBytes(int_ty.representation()),
ElementSizeInBytes(float_ty.representation()));
Node* stack_slot =
graph()->NewNode(mcgraph()->machine()->StackSlot(stack_slot_size));
const Operator* store_op = mcgraph()->machine()->Store(
StoreRepresentation(float_ty.representation(), kNoWriteBarrier));
SetEffect(graph()->NewNode(store_op, stack_slot, Int32Constant(0), input,
effect(), control()));
MachineType sig_types[] = {MachineType::Int32(), MachineType::Pointer()};
MachineSignature sig(1, 1, sig_types);
Node* function =
graph()->NewNode(mcgraph()->common()->ExternalConstant(call_ref));
Node* overflow = BuildCCall(&sig, function, stack_slot);
if (IsTrappingConvertOp(opcode)) {
ZeroCheck32(wasm::kTrapFloatUnrepresentable, overflow, position);
return SetEffect(graph()->NewNode(mcgraph()->machine()->Load(int_ty),
stack_slot, Int32Constant(0), effect(),
control()));
}
Node* test = Binop(wasm::kExprI32Eq, overflow, Int32Constant(0), position);
Diamond tl_d(graph(), mcgraph()->common(), test, BranchHint::kFalse);
tl_d.Chain(control());
Node* nan_test = Binop(NeOp(float_ty), input, input);
Diamond nan_d(graph(), mcgraph()->common(), nan_test, BranchHint::kFalse);
nan_d.Nest(tl_d, true);
Node* neg_test = Binop(LtOp(float_ty), input, Zero(this, float_ty));
Diamond sat_d(graph(), mcgraph()->common(), neg_test, BranchHint::kNone);
sat_d.Nest(nan_d, false);
Node* sat_val =
sat_d.Phi(int_ty.representation(), Min(this, int_ty), Max(this, int_ty));
Node* load =
SetEffect(graph()->NewNode(mcgraph()->machine()->Load(int_ty), stack_slot,
Int32Constant(0), effect(), control()));
Node* nan_val =
nan_d.Phi(int_ty.representation(), Zero(this, int_ty), sat_val);
return tl_d.Phi(int_ty.representation(), nan_val, load);
}
Node* WasmGraphBuilder::MemoryGrow(Node* input) {
needs_stack_check_ = true;
WasmMemoryGrowDescriptor interface_descriptor;
auto call_descriptor = Linkage::GetStubCallDescriptor(
mcgraph()->zone(), // zone
interface_descriptor, // descriptor
interface_descriptor.GetStackParameterCount(), // stack parameter count
CallDescriptor::kNoFlags, // flags
Operator::kNoProperties, // properties
StubCallMode::kCallWasmRuntimeStub); // stub call mode
// A direct call to a wasm runtime stub defined in this module.
// Just encode the stub index. This will be patched at relocation.
Node* call_target = mcgraph()->RelocatableIntPtrConstant(
wasm::WasmCode::kWasmMemoryGrow, RelocInfo::WASM_STUB_CALL);
return SetEffectControl(
graph()->NewNode(mcgraph()->common()->Call(call_descriptor), call_target,
input, effect(), control()));
}
Node* WasmGraphBuilder::Throw(uint32_t exception_index,
const wasm::WasmException* exception,
const Vector<Node*> values,
wasm::WasmCodePosition position) {
needs_stack_check_ = true;
uint32_t encoded_size = WasmExceptionPackage::GetEncodedSize(exception);
Node* create_parameters[] = {
LoadExceptionTagFromTable(exception_index),
BuildChangeUint31ToSmi(mcgraph()->Uint32Constant(encoded_size))};
Node* except_obj =
BuildCallToRuntime(Runtime::kWasmThrowCreate, create_parameters,
arraysize(create_parameters));
SetSourcePosition(except_obj, position);
Node* values_array = CALL_BUILTIN(
WasmGetOwnProperty, except_obj,
LOAD_FULL_POINTER(BuildLoadIsolateRoot(),
IsolateData::root_slot_offset(
RootIndex::kwasm_exception_values_symbol)),
LOAD_INSTANCE_FIELD(NativeContext, MachineType::TaggedPointer()));
uint32_t index = 0;
const wasm::WasmExceptionSig* sig = exception->sig;
MachineOperatorBuilder* m = mcgraph()->machine();
for (size_t i = 0; i < sig->parameter_count(); ++i) {
Node* value = values[i];
switch (sig->GetParam(i).kind()) {
case wasm::ValueType::kF32:
value = graph()->NewNode(m->BitcastFloat32ToInt32(), value);
V8_FALLTHROUGH;
case wasm::ValueType::kI32:
BuildEncodeException32BitValue(values_array, &index, value);
break;
case wasm::ValueType::kF64:
value = graph()->NewNode(m->BitcastFloat64ToInt64(), value);
V8_FALLTHROUGH;
case wasm::ValueType::kI64: {
Node* upper32 = graph()->NewNode(
m->TruncateInt64ToInt32(),
Binop(wasm::kExprI64ShrU, value, Int64Constant(32)));
BuildEncodeException32BitValue(values_array, &index, upper32);
Node* lower32 = graph()->NewNode(m->TruncateInt64ToInt32(), value);
BuildEncodeException32BitValue(values_array, &index, lower32);
break;
}
case wasm::ValueType::kS128:
BuildEncodeException32BitValue(
values_array, &index,
graph()->NewNode(m->I32x4ExtractLane(0), value));
BuildEncodeException32BitValue(
values_array, &index,
graph()->NewNode(m->I32x4ExtractLane(1), value));
BuildEncodeException32BitValue(
values_array, &index,
graph()->NewNode(m->I32x4ExtractLane(2), value));
BuildEncodeException32BitValue(
values_array, &index,
graph()->NewNode(m->I32x4ExtractLane(3), value));
break;
case wasm::ValueType::kRef:
case wasm::ValueType::kOptRef:
STORE_FIXED_ARRAY_SLOT_ANY(values_array, index, value);
++index;
break;
case wasm::ValueType::kRtt: // TODO(7748): Implement.
case wasm::ValueType::kI8:
case wasm::ValueType::kI16:
case wasm::ValueType::kStmt:
case wasm::ValueType::kBottom:
UNREACHABLE();
}
}
DCHECK_EQ(encoded_size, index);
WasmThrowDescriptor interface_descriptor;
auto call_descriptor = Linkage::GetStubCallDescriptor(
mcgraph()->zone(), interface_descriptor,
interface_descriptor.GetStackParameterCount(), CallDescriptor::kNoFlags,
Operator::kNoProperties, StubCallMode::kCallWasmRuntimeStub);
Node* call_target = mcgraph()->RelocatableIntPtrConstant(
wasm::WasmCode::kWasmThrow, RelocInfo::WASM_STUB_CALL);
Node* call = SetEffectControl(
graph()->NewNode(mcgraph()->common()->Call(call_descriptor), call_target,
except_obj, effect(), control()));
SetSourcePosition(call, position);
return call;
}
void WasmGraphBuilder::BuildEncodeException32BitValue(Node* values_array,
uint32_t* index,
Node* value) {
MachineOperatorBuilder* machine = mcgraph()->machine();
Node* upper_halfword_as_smi = BuildChangeUint31ToSmi(
graph()->NewNode(machine->Word32Shr(), value, Int32Constant(16)));
STORE_FIXED_ARRAY_SLOT_SMI(values_array, *index, upper_halfword_as_smi);
++(*index);
Node* lower_halfword_as_smi = BuildChangeUint31ToSmi(
graph()->NewNode(machine->Word32And(), value, Int32Constant(0xFFFFu)));
STORE_FIXED_ARRAY_SLOT_SMI(values_array, *index, lower_halfword_as_smi);
++(*index);
}
Node* WasmGraphBuilder::BuildDecodeException32BitValue(Node* values_array,
uint32_t* index) {
MachineOperatorBuilder* machine = mcgraph()->machine();
Node* upper =
BuildChangeSmiToInt32(LOAD_FIXED_ARRAY_SLOT_SMI(values_array, *index));
(*index)++;
upper = graph()->NewNode(machine->Word32Shl(), upper, Int32Constant(16));
Node* lower =
BuildChangeSmiToInt32(LOAD_FIXED_ARRAY_SLOT_SMI(values_array, *index));
(*index)++;
Node* value = graph()->NewNode(machine->Word32Or(), upper, lower);
return value;
}
Node* WasmGraphBuilder::BuildDecodeException64BitValue(Node* values_array,
uint32_t* index) {
Node* upper = Binop(wasm::kExprI64Shl,
Unop(wasm::kExprI64UConvertI32,
BuildDecodeException32BitValue(values_array, index)),
Int64Constant(32));
Node* lower = Unop(wasm::kExprI64UConvertI32,
BuildDecodeException32BitValue(values_array, index));
return Binop(wasm::kExprI64Ior, upper, lower);
}
Node* WasmGraphBuilder::Rethrow(Node* except_obj) {
// TODO(v8:8091): Currently the message of the original exception is not being
// preserved when rethrown to the console. The pending message will need to be
// saved when caught and restored here while being rethrown.
WasmThrowDescriptor interface_descriptor;
auto call_descriptor = Linkage::GetStubCallDescriptor(
mcgraph()->zone(), interface_descriptor,
interface_descriptor.GetStackParameterCount(), CallDescriptor::kNoFlags,
Operator::kNoProperties, StubCallMode::kCallWasmRuntimeStub);
Node* call_target = mcgraph()->RelocatableIntPtrConstant(
wasm::WasmCode::kWasmRethrow, RelocInfo::WASM_STUB_CALL);
return gasm_->Call(call_descriptor, call_target, except_obj);
}
Node* WasmGraphBuilder::ExceptionTagEqual(Node* caught_tag,
Node* expected_tag) {
MachineOperatorBuilder* machine = mcgraph()->machine();
return graph()->NewNode(machine->WordEqual(), caught_tag, expected_tag);
}
Node* WasmGraphBuilder::LoadExceptionTagFromTable(uint32_t exception_index) {
Node* exceptions_table =
LOAD_INSTANCE_FIELD(ExceptionsTable, MachineType::TaggedPointer());
Node* tag = LOAD_FIXED_ARRAY_SLOT_PTR(exceptions_table, exception_index);
return tag;
}
Node* WasmGraphBuilder::GetExceptionTag(Node* except_obj,
wasm::WasmCodePosition position) {
TrapIfTrue(wasm::kTrapBrOnExnNull, gasm_->WordEqual(RefNull(), except_obj),
position);
return CALL_BUILTIN(
WasmGetOwnProperty, except_obj,
LOAD_FULL_POINTER(
BuildLoadIsolateRoot(),
IsolateData::root_slot_offset(RootIndex::kwasm_exception_tag_symbol)),
LOAD_INSTANCE_FIELD(NativeContext, MachineType::TaggedPointer()));
}
Node* WasmGraphBuilder::GetExceptionValues(Node* except_obj,
const wasm::WasmException* exception,
Vector<Node*> values) {
Node* values_array = CALL_BUILTIN(
WasmGetOwnProperty, except_obj,
LOAD_FULL_POINTER(BuildLoadIsolateRoot(),
IsolateData::root_slot_offset(
RootIndex::kwasm_exception_values_symbol)),
LOAD_INSTANCE_FIELD(NativeContext, MachineType::TaggedPointer()));
uint32_t index = 0;
const wasm::WasmExceptionSig* sig = exception->sig;
DCHECK_EQ(sig->parameter_count(), values.size());
for (size_t i = 0; i < sig->parameter_count(); ++i) {
Node* value;
switch (sig->GetParam(i).kind()) {
case wasm::ValueType::kI32:
value = BuildDecodeException32BitValue(values_array, &index);
break;
case wasm::ValueType::kI64:
value = BuildDecodeException64BitValue(values_array, &index);
break;
case wasm::ValueType::kF32: {
value = Unop(wasm::kExprF32ReinterpretI32,
BuildDecodeException32BitValue(values_array, &index));
break;
}
case wasm::ValueType::kF64: {
value = Unop(wasm::kExprF64ReinterpretI64,
BuildDecodeException64BitValue(values_array, &index));
break;
}
case wasm::ValueType::kS128:
value = graph()->NewNode(
mcgraph()->machine()->I32x4Splat(),
BuildDecodeException32BitValue(values_array, &index));
value = graph()->NewNode(
mcgraph()->machine()->I32x4ReplaceLane(1), value,
BuildDecodeException32BitValue(values_array, &index));
value = graph()->NewNode(
mcgraph()->machine()->I32x4ReplaceLane(2), value,
BuildDecodeException32BitValue(values_array, &index));
value = graph()->NewNode(
mcgraph()->machine()->I32x4ReplaceLane(3), value,
BuildDecodeException32BitValue(values_array, &index));
break;
case wasm::ValueType::kRef:
case wasm::ValueType::kOptRef:
value = LOAD_FIXED_ARRAY_SLOT_ANY(values_array, index);
++index;
break;
case wasm::ValueType::kRtt: // TODO(7748): Implement.
case wasm::ValueType::kI8:
case wasm::ValueType::kI16:
case wasm::ValueType::kStmt:
case wasm::ValueType::kBottom:
UNREACHABLE();
}
values[i] = value;
}
DCHECK_EQ(index, WasmExceptionPackage::GetEncodedSize(exception));
return values_array;
}
Node* WasmGraphBuilder::BuildI32DivS(Node* left, Node* right,
wasm::WasmCodePosition position) {
MachineOperatorBuilder* m = mcgraph()->machine();
ZeroCheck32(wasm::kTrapDivByZero, right, position);
Node* before = control();
Node* denom_is_m1;
Node* denom_is_not_m1;
BranchExpectFalse(
graph()->NewNode(m->Word32Equal(), right, mcgraph()->Int32Constant(-1)),
&denom_is_m1, &denom_is_not_m1);
SetControl(denom_is_m1);
TrapIfEq32(wasm::kTrapDivUnrepresentable, left, kMinInt, position);
if (control() != denom_is_m1) {
SetControl(graph()->NewNode(mcgraph()->common()->Merge(2), denom_is_not_m1,
control()));
} else {
SetControl(before);
}
return graph()->NewNode(m->Int32Div(), left, right, control());
}
Node* WasmGraphBuilder::BuildI32RemS(Node* left, Node* right,
wasm::WasmCodePosition position) {
MachineOperatorBuilder* m = mcgraph()->machine();
ZeroCheck32(wasm::kTrapRemByZero, right, position);
Diamond d(
graph(), mcgraph()->common(),
graph()->NewNode(m->Word32Equal(), right, mcgraph()->Int32Constant(-1)),
BranchHint::kFalse);
d.Chain(control());
return d.Phi(MachineRepresentation::kWord32, mcgraph()->Int32Constant(0),
graph()->NewNode(m->Int32Mod(), left, right, d.if_false));
}
Node* WasmGraphBuilder::BuildI32DivU(Node* left, Node* right,
wasm::WasmCodePosition position) {
MachineOperatorBuilder* m = mcgraph()->machine();
return graph()->NewNode(m->Uint32Div(), left, right,
ZeroCheck32(wasm::kTrapDivByZero, right, position));
}
Node* WasmGraphBuilder::BuildI32RemU(Node* left, Node* right,
wasm::WasmCodePosition position) {
MachineOperatorBuilder* m = mcgraph()->machine();
return graph()->NewNode(m->Uint32Mod(), left, right,
ZeroCheck32(wasm::kTrapRemByZero, right, position));
}
Node* WasmGraphBuilder::BuildI32AsmjsDivS(Node* left, Node* right) {
MachineOperatorBuilder* m = mcgraph()->machine();
Int32Matcher mr(right);
if (mr.HasResolvedValue()) {
if (mr.ResolvedValue() == 0) {
return mcgraph()->Int32Constant(0);
} else if (mr.ResolvedValue() == -1) {
// The result is the negation of the left input.
return graph()->NewNode(m->Int32Sub(), mcgraph()->Int32Constant(0), left);
}
return graph()->NewNode(m->Int32Div(), left, right, control());
}
// asm.js semantics return 0 on divide or mod by zero.
if (m->Int32DivIsSafe()) {
// The hardware instruction does the right thing (e.g. arm).
return graph()->NewNode(m->Int32Div(), left, right, graph()->start());
}
// Check denominator for zero.
Diamond z(
graph(), mcgraph()->common(),
graph()->NewNode(m->Word32Equal(), right, mcgraph()->Int32Constant(0)),
BranchHint::kFalse);
// Check numerator for -1. (avoid minint / -1 case).
Diamond n(
graph(), mcgraph()->common(),
graph()->NewNode(m->Word32Equal(), right, mcgraph()->Int32Constant(-1)),
BranchHint::kFalse);
Node* div = graph()->NewNode(m->Int32Div(), left, right, z.if_false);
Node* neg =
graph()->NewNode(m->Int32Sub(), mcgraph()->Int32Constant(0), left);
return n.Phi(
MachineRepresentation::kWord32, neg,
z.Phi(MachineRepresentation::kWord32, mcgraph()->Int32Constant(0), div));
}
Node* WasmGraphBuilder::BuildI32AsmjsRemS(Node* left, Node* right) {
CommonOperatorBuilder* c = mcgraph()->common();
MachineOperatorBuilder* m = mcgraph()->machine();
Node* const zero = mcgraph()->Int32Constant(0);
Int32Matcher mr(right);
if (mr.HasResolvedValue()) {
if (mr.ResolvedValue() == 0 || mr.ResolvedValue() == -1) {
return zero;
}
return graph()->NewNode(m->Int32Mod(), left, right, control());
}
// General case for signed integer modulus, with optimization for (unknown)
// power of 2 right hand side.
//
// if 0 < right then
// msk = right - 1
// if right & msk != 0 then
// left % right
// else
// if left < 0 then
// -(-left & msk)
// else
// left & msk
// else
// if right < -1 then
// left % right
// else
// zero
//
// Note: We do not use the Diamond helper class here, because it really hurts
// readability with nested diamonds.
Node* const minus_one = mcgraph()->Int32Constant(-1);
const Operator* const merge_op = c->Merge(2);
const Operator* const phi_op = c->Phi(MachineRepresentation::kWord32, 2);
Node* check0 = graph()->NewNode(m->Int32LessThan(), zero, right);
Node* branch0 =
graph()->NewNode(c->Branch(BranchHint::kTrue), check0, graph()->start());
Node* if_true0 = graph()->NewNode(c->IfTrue(), branch0);
Node* true0;
{
Node* msk = graph()->NewNode(m->Int32Add(), right, minus_one);
Node* check1 = graph()->NewNode(m->Word32And(), right, msk);
Node* branch1 = graph()->NewNode(c->Branch(), check1, if_true0);
Node* if_true1 = graph()->NewNode(c->IfTrue(), branch1);
Node* true1 = graph()->NewNode(m->Int32Mod(), left, right, if_true1);
Node* if_false1 = graph()->NewNode(c->IfFalse(), branch1);
Node* false1;
{
Node* check2 = graph()->NewNode(m->Int32LessThan(), left, zero);
Node* branch2 =
graph()->NewNode(c->Branch(BranchHint::kFalse), check2, if_false1);
Node* if_true2 = graph()->NewNode(c->IfTrue(), branch2);
Node* true2 = graph()->NewNode(
m->Int32Sub(), zero,
graph()->NewNode(m->Word32And(),
graph()->NewNode(m->Int32Sub(), zero, left), msk));
Node* if_false2 = graph()->NewNode(c->IfFalse(), branch2);
Node* false2 = graph()->NewNode(m->Word32And(), left, msk);
if_false1 = graph()->NewNode(merge_op, if_true2, if_false2);
false1 = graph()->NewNode(phi_op, true2, false2, if_false1);
}
if_true0 = graph()->NewNode(merge_op, if_true1, if_false1);
true0 = graph()->NewNode(phi_op, true1, false1, if_true0);
}
Node* if_false0 = graph()->NewNode(c->IfFalse(), branch0);
Node* false0;
{
Node* check1 = graph()->NewNode(m->Int32LessThan(), right, minus_one);
Node* branch1 =
graph()->NewNode(c->Branch(BranchHint::kTrue), check1, if_false0);
Node* if_true1 = graph()->NewNode(c->IfTrue(), branch1);
Node* true1 = graph()->NewNode(m->Int32Mod(), left, right, if_true1);
Node* if_false1 = graph()->NewNode(c->IfFalse(), branch1);
Node* false1 = zero;
if_false0 = graph()->NewNode(merge_op, if_true1, if_false1);
false0 = graph()->NewNode(phi_op, true1, false1, if_false0);
}
Node* merge0 = graph()->NewNode(merge_op, if_true0, if_false0);
return graph()->NewNode(phi_op, true0, false0, merge0);
}
Node* WasmGraphBuilder::BuildI32AsmjsDivU(Node* left, Node* right) {
MachineOperatorBuilder* m = mcgraph()->machine();
// asm.js semantics return 0 on divide or mod by zero.
if (m->Uint32DivIsSafe()) {
// The hardware instruction does the right thing (e.g. arm).
return graph()->NewNode(m->Uint32Div(), left, right, graph()->start());
}
// Explicit check for x % 0.
Diamond z(
graph(), mcgraph()->common(),
graph()->NewNode(m->Word32Equal(), right, mcgraph()->Int32Constant(0)),
BranchHint::kFalse);
return z.Phi(MachineRepresentation::kWord32, mcgraph()->Int32Constant(0),
graph()->NewNode(mcgraph()->machine()->Uint32Div(), left, right,
z.if_false));
}
Node* WasmGraphBuilder::BuildI32AsmjsRemU(Node* left, Node* right) {
MachineOperatorBuilder* m = mcgraph()->machine();
// asm.js semantics return 0 on divide or mod by zero.
// Explicit check for x % 0.
Diamond z(
graph(), mcgraph()->common(),
graph()->NewNode(m->Word32Equal(), right, mcgraph()->Int32Constant(0)),
BranchHint::kFalse);
Node* rem = graph()->NewNode(mcgraph()->machine()->Uint32Mod(), left, right,
z.if_false);
return z.Phi(MachineRepresentation::kWord32, mcgraph()->Int32Constant(0),
rem);
}
Node* WasmGraphBuilder::BuildI64DivS(Node* left, Node* right,
wasm::WasmCodePosition position) {
if (mcgraph()->machine()->Is32()) {
return BuildDiv64Call(left, right, ExternalReference::wasm_int64_div(),
MachineType::Int64(), wasm::kTrapDivByZero, position);
}
ZeroCheck64(wasm::kTrapDivByZero, right, position);
Node* before = control();
Node* denom_is_m1;
Node* denom_is_not_m1;
BranchExpectFalse(graph()->NewNode(mcgraph()->machine()->Word64Equal(), right,
mcgraph()->Int64Constant(-1)),
&denom_is_m1, &denom_is_not_m1);
SetControl(denom_is_m1);
TrapIfEq64(wasm::kTrapDivUnrepresentable, left,
std::numeric_limits<int64_t>::min(), position);
if (control() != denom_is_m1) {
SetControl(graph()->NewNode(mcgraph()->common()->Merge(2), denom_is_not_m1,
control()));
} else {
SetControl(before);
}
return graph()->NewNode(mcgraph()->machine()->Int64Div(), left, right,
control());
}
Node* WasmGraphBuilder::BuildI64RemS(Node* left, Node* right,
wasm::WasmCodePosition position) {
if (mcgraph()->machine()->Is32()) {
return BuildDiv64Call(left, right, ExternalReference::wasm_int64_mod(),
MachineType::Int64(), wasm::kTrapRemByZero, position);
}
ZeroCheck64(wasm::kTrapRemByZero, right, position);
Diamond d(mcgraph()->graph(), mcgraph()->common(),
graph()->NewNode(mcgraph()->machine()->Word64Equal(), right,
mcgraph()->Int64Constant(-1)));
d.Chain(control());
Node* rem = graph()->NewNode(mcgraph()->machine()->Int64Mod(), left, right,
d.if_false);
return d.Phi(MachineRepresentation::kWord64, mcgraph()->Int64Constant(0),
rem);
}
Node* WasmGraphBuilder::BuildI64DivU(Node* left, Node* right,
wasm::WasmCodePosition position) {
if (mcgraph()->machine()->Is32()) {
return BuildDiv64Call(left, right, ExternalReference::wasm_uint64_div(),
MachineType::Int64(), wasm::kTrapDivByZero, position);
}
return graph()->NewNode(mcgraph()->machine()->Uint64Div(), left, right,
ZeroCheck64(wasm::kTrapDivByZero, right, position));
}
Node* WasmGraphBuilder::BuildI64RemU(Node* left, Node* right,
wasm::WasmCodePosition position) {
if (mcgraph()->machine()->Is32()) {
return BuildDiv64Call(left, right, ExternalReference::wasm_uint64_mod(),
MachineType::Int64(), wasm::kTrapRemByZero, position);
}
return graph()->NewNode(mcgraph()->machine()->Uint64Mod(), left, right,
ZeroCheck64(wasm::kTrapRemByZero, right, position));
}
Node* WasmGraphBuilder::GetBuiltinPointerTarget(int builtin_id) {
static_assert(std::is_same<Smi, BuiltinPtr>(), "BuiltinPtr must be Smi");
return graph()->NewNode(mcgraph()->common()->NumberConstant(builtin_id));
}
Node* WasmGraphBuilder::BuildDiv64Call(Node* left, Node* right,
ExternalReference ref,
MachineType result_type,
wasm::TrapReason trap_zero,
wasm::WasmCodePosition position) {
Node* stack_slot =
StoreArgsInStackSlot({{MachineRepresentation::kWord64, left},
{MachineRepresentation::kWord64, right}});
MachineType sig_types[] = {MachineType::Int32(), MachineType::Pointer()};
MachineSignature sig(1, 1, sig_types);
Node* function = graph()->NewNode(mcgraph()->common()->ExternalConstant(ref));
Node* call = BuildCCall(&sig, function, stack_slot);
ZeroCheck32(trap_zero, call, position);
TrapIfEq32(wasm::kTrapDivUnrepresentable, call, -1, position);
return SetEffect(graph()->NewNode(mcgraph()->machine()->Load(result_type),
stack_slot, mcgraph()->Int32Constant(0),
effect(), control()));
}
template <typename... Args>
Node* WasmGraphBuilder::BuildCCall(MachineSignature* sig, Node* function,
Args... args) {
DCHECK_LE(sig->return_count(), 1);
DCHECK_EQ(sizeof...(args), sig->parameter_count());
Node* const call_args[] = {function, args..., effect(), control()};
auto call_descriptor =
Linkage::GetSimplifiedCDescriptor(mcgraph()->zone(), sig);
const Operator* op = mcgraph()->common()->Call(call_descriptor);
return SetEffect(graph()->NewNode(op, arraysize(call_args), call_args));
}
Node* WasmGraphBuilder::BuildCallNode(const wasm::FunctionSig* sig,
Vector<Node*> args,
wasm::WasmCodePosition position,
Node* instance_node, const Operator* op) {
if (instance_node == nullptr) {
DCHECK_NOT_NULL(instance_node_);
instance_node = instance_node_.get();
}
needs_stack_check_ = true;
const size_t params = sig->parameter_count();
const size_t extra = 3; // instance_node, effect, and control.
const size_t count = 1 + params + extra;
// Reallocate the buffer to make space for extra inputs.
base::SmallVector<Node*, 16 + extra> inputs(count);
DCHECK_EQ(1 + params, args.size());
// Make room for the instance_node parameter at index 1, just after code.
inputs[0] = args[0]; // code
inputs[1] = instance_node;
if (params > 0) memcpy(&inputs[2], &args[1], params * sizeof(Node*));
// Add effect and control inputs.
inputs[params + 2] = effect();
inputs[params + 3] = control();
Node* call = graph()->NewNode(op, static_cast<int>(count), inputs.begin());
// Return calls have no effect output. Other calls are the new effect node.
if (op->EffectOutputCount() > 0) SetEffect(call);
DCHECK(position == wasm::kNoCodePosition || position > 0);
if (position > 0) SetSourcePosition(call, position);
return call;
}
Node* WasmGraphBuilder::BuildWasmCall(const wasm::FunctionSig* sig,
Vector<Node*> args, Vector<Node*> rets,
wasm::WasmCodePosition position,
Node* instance_node,
UseRetpoline use_retpoline) {
CallDescriptor* call_descriptor =
GetWasmCallDescriptor(mcgraph()->zone(), sig, use_retpoline);
const Operator* op = mcgraph()->common()->Call(call_descriptor);
Node* call = BuildCallNode(sig, args, position, instance_node, op);
size_t ret_count = sig->return_count();
if (ret_count == 0) return call; // No return value.
DCHECK_EQ(ret_count, rets.size());
if (ret_count == 1) {
// Only a single return value.
rets[0] = call;
} else {
// Create projections for all return values.
for (size_t i = 0; i < ret_count; i++) {
rets[i] = graph()->NewNode(mcgraph()->common()->Projection(i), call,
graph()->start());
}
}
return call;
}
Node* WasmGraphBuilder::BuildWasmReturnCall(const wasm::FunctionSig* sig,
Vector<Node*> args,
wasm::WasmCodePosition position,
Node* instance_node,
UseRetpoline use_retpoline) {
CallDescriptor* call_descriptor =
GetWasmCallDescriptor(mcgraph()->zone(), sig, use_retpoline);
const Operator* op = mcgraph()->common()->TailCall(call_descriptor);
Node* call = BuildCallNode(sig, args, position, instance_node, op);
MergeControlToEnd(mcgraph(), call);
return call;
}
Node* WasmGraphBuilder::BuildImportCall(const wasm::FunctionSig* sig,
Vector<Node*> args, Vector<Node*> rets,
wasm::WasmCodePosition position,
int func_index,
IsReturnCall continuation) {
// Load the imported function refs array from the instance.
Node* imported_function_refs =
LOAD_INSTANCE_FIELD(ImportedFunctionRefs, MachineType::TaggedPointer());
Node* ref_node =
LOAD_FIXED_ARRAY_SLOT_PTR(imported_function_refs, func_index);
// Load the target from the imported_targets array at a known offset.
Node* imported_targets =
LOAD_INSTANCE_FIELD(ImportedFunctionTargets, MachineType::Pointer());
Node* target_node = SetEffect(graph()->NewNode(
mcgraph()->machine()->Load(MachineType::Pointer()), imported_targets,
mcgraph()->Int32Constant(func_index * kSystemPointerSize), effect(),
control()));
args[0] = target_node;
const UseRetpoline use_retpoline =
untrusted_code_mitigations_ ? kRetpoline : kNoRetpoline;
switch (continuation) {
case kCallContinues:
return BuildWasmCall(sig, args, rets, position, ref_node, use_retpoline);
case kReturnCall:
DCHECK(rets.empty());
return BuildWasmReturnCall(sig, args, position, ref_node, use_retpoline);
}
}
Node* WasmGraphBuilder::BuildImportCall(const wasm::FunctionSig* sig,
Vector<Node*> args, Vector<Node*> rets,
wasm::WasmCodePosition position,
Node* func_index,
IsReturnCall continuation) {
// Load the imported function refs array from the instance.
Node* imported_function_refs =
LOAD_INSTANCE_FIELD(ImportedFunctionRefs, MachineType::TaggedPointer());
// Access fixed array at {header_size - tag + func_index * kTaggedSize}.
Node* imported_instances_data = graph()->NewNode(
mcgraph()->machine()->IntAdd(), imported_function_refs,
mcgraph()->IntPtrConstant(
wasm::ObjectAccess::ElementOffsetInTaggedFixedArray(0)));
Node* func_index_times_tagged_size = graph()->NewNode(
mcgraph()->machine()->IntMul(), Uint32ToUintptr(func_index),
mcgraph()->Int32Constant(kTaggedSize));
Node* ref_node =
gasm_->Load(MachineType::TaggedPointer(), imported_instances_data,
func_index_times_tagged_size);
// Load the target from the imported_targets array at the offset of
// {func_index}.
Node* func_index_times_pointersize;
if (kSystemPointerSize == kTaggedSize) {
func_index_times_pointersize = func_index_times_tagged_size;
} else {
DCHECK_EQ(kSystemPointerSize, kTaggedSize + kTaggedSize);
func_index_times_pointersize = graph()->NewNode(
mcgraph()->machine()->Int32Add(), func_index_times_tagged_size,
func_index_times_tagged_size);
}
Node* imported_targets =
LOAD_INSTANCE_FIELD(ImportedFunctionTargets, MachineType::Pointer());
Node* target_node = SetEffect(graph()->NewNode(
mcgraph()->machine()->Load(MachineType::Pointer()), imported_targets,
func_index_times_pointersize, effect(), control()));
args[0] = target_node;
const UseRetpoline use_retpoline =
untrusted_code_mitigations_ ? kRetpoline : kNoRetpoline;
switch (continuation) {
case kCallContinues:
return BuildWasmCall(sig, args, rets, position, ref_node, use_retpoline);
case kReturnCall:
DCHECK(rets.empty());
return BuildWasmReturnCall(sig, args, position, ref_node, use_retpoline);
}
}
Node* WasmGraphBuilder::CallDirect(uint32_t index, Vector<Node*> args,
Vector<Node*> rets,
wasm::WasmCodePosition position) {
DCHECK_NULL(args[0]);
const wasm::FunctionSig* sig = env_->module->functions[index].sig;
if (env_ && index < env_->module->num_imported_functions) {
// Call to an imported function.
return BuildImportCall(sig, args, rets, position, index, kCallContinues);
}
// A direct call to a wasm function defined in this module.
// Just encode the function index. This will be patched at instantiation.
Address code = static_cast<Address>(index);
args[0] = mcgraph()->RelocatableIntPtrConstant(code, RelocInfo::WASM_CALL);
return BuildWasmCall(sig, args, rets, position, nullptr, kNoRetpoline);
}
Node* WasmGraphBuilder::CallIndirect(uint32_t table_index, uint32_t sig_index,
Vector<Node*> args, Vector<Node*> rets,
wasm::WasmCodePosition position) {
return BuildIndirectCall(table_index, sig_index, args, rets, position,
kCallContinues);
}
void WasmGraphBuilder::LoadIndirectFunctionTable(uint32_t table_index,
Node** ift_size,
Node** ift_sig_ids,
Node** ift_targets,
Node** ift_instances) {
if (table_index == 0) {
*ift_size =
LOAD_INSTANCE_FIELD(IndirectFunctionTableSize, MachineType::Uint32());
*ift_sig_ids = LOAD_INSTANCE_FIELD(IndirectFunctionTableSigIds,
MachineType::Pointer());
*ift_targets = LOAD_INSTANCE_FIELD(IndirectFunctionTableTargets,
MachineType::Pointer());
*ift_instances = LOAD_INSTANCE_FIELD(IndirectFunctionTableRefs,
MachineType::TaggedPointer());
return;
}
Node* ift_tables =
LOAD_INSTANCE_FIELD(IndirectFunctionTables, MachineType::TaggedPointer());
Node* ift_table = LOAD_FIXED_ARRAY_SLOT_ANY(ift_tables, table_index);
*ift_size = gasm_->Load(
MachineType::Int32(), ift_table,
wasm::ObjectAccess::ToTagged(WasmIndirectFunctionTable::kSizeOffset));
*ift_sig_ids = gasm_->Load(
MachineType::Pointer(), ift_table,
wasm::ObjectAccess::ToTagged(WasmIndirectFunctionTable::kSigIdsOffset));
*ift_targets = gasm_->Load(
MachineType::Pointer(), ift_table,
wasm::ObjectAccess::ToTagged(WasmIndirectFunctionTable::kTargetsOffset));
*ift_instances = gasm_->Load(
MachineType::TaggedPointer(), ift_table,
wasm::ObjectAccess::ToTagged(WasmIndirectFunctionTable::kRefsOffset));
}
Node* WasmGraphBuilder::BuildIndirectCall(uint32_t table_index,
uint32_t sig_index,
Vector<Node*> args,
Vector<Node*> rets,
wasm::WasmCodePosition position,
IsReturnCall continuation) {
DCHECK_NOT_NULL(args[0]);
DCHECK_NOT_NULL(env_);
// First we have to load the table.
Node* ift_size;
Node* ift_sig_ids;
Node* ift_targets;
Node* ift_instances;
LoadIndirectFunctionTable(table_index, &ift_size, &ift_sig_ids, &ift_targets,
&ift_instances);
const wasm::FunctionSig* sig = env_->module->signature(sig_index);
MachineOperatorBuilder* machine = mcgraph()->machine();
Node* key = args[0];
// Bounds check against the table size.
Node* in_bounds = graph()->NewNode(machine->Uint32LessThan(), key, ift_size);
TrapIfFalse(wasm::kTrapTableOutOfBounds, in_bounds, position);
// Mask the key to prevent SSCA.
if (untrusted_code_mitigations_) {
// mask = ((key - size) & ~key) >> 31
Node* neg_key =
graph()->NewNode(machine->Word32Xor(), key, Int32Constant(-1));
Node* masked_diff = graph()->NewNode(
machine->Word32And(),
graph()->NewNode(machine->Int32Sub(), key, ift_size), neg_key);
Node* mask =
graph()->NewNode(machine->Word32Sar(), masked_diff, Int32Constant(31));
key = graph()->NewNode(machine->Word32And(), key, mask);
}
Node* int32_scaled_key = Uint32ToUintptr(
graph()->NewNode(machine->Word32Shl(), key, Int32Constant(2)));
Node* loaded_sig = SetEffect(
graph()->NewNode(machine->Load(MachineType::Int32()), ift_sig_ids,
int32_scaled_key, effect(), control()));
// Check that the dynamic type of the function is a subtype of its static
// (table) type. Currently, the only subtyping between function types is
// $t <: funcref for all $t: function_type.
// TODO(7748): Expand this with function subtyping.
const bool needs_typechecking =
env_->module->tables[table_index].type == wasm::kWasmFuncRef;
if (needs_typechecking) {
int32_t expected_sig_id = env_->module->canonicalized_type_ids[sig_index];
Node* sig_match = graph()->NewNode(machine->Word32Equal(), loaded_sig,
Int32Constant(expected_sig_id));
TrapIfFalse(wasm::kTrapFuncSigMismatch, sig_match, position);
} else {
// We still have to check that the entry is initialized.
// TODO(9495): Skip this check for non-nullable tables when they are
// allowed.
Node* function_is_null =
graph()->NewNode(machine->Word32Equal(), loaded_sig, Int32Constant(-1));
TrapIfTrue(wasm::kTrapNullDereference, function_is_null, position);
}
Node* tagged_scaled_key;
if (kTaggedSize == kInt32Size) {
tagged_scaled_key = int32_scaled_key;
} else {
DCHECK_EQ(kTaggedSize, kInt32Size * 2);
tagged_scaled_key = graph()->NewNode(machine->Int32Add(), int32_scaled_key,
int32_scaled_key);
}
Node* target_instance = gasm_->Load(
MachineType::TaggedPointer(),
graph()->NewNode(machine->IntAdd(), ift_instances, tagged_scaled_key),
wasm::ObjectAccess::ElementOffsetInTaggedFixedArray(0));
Node* intptr_scaled_key;
if (kSystemPointerSize == kTaggedSize) {
intptr_scaled_key = tagged_scaled_key;
} else {
DCHECK_EQ(kSystemPointerSize, kTaggedSize + kTaggedSize);
intptr_scaled_key = graph()->NewNode(machine->Int32Add(), tagged_scaled_key,
tagged_scaled_key);
}
Node* target = SetEffect(
graph()->NewNode(machine->Load(MachineType::Pointer()), ift_targets,
intptr_scaled_key, effect(), control()));
args[0] = target;
const UseRetpoline use_retpoline =
untrusted_code_mitigations_ ? kRetpoline : kNoRetpoline;
switch (continuation) {
case kCallContinues:
return BuildWasmCall(sig, args, rets, position, target_instance,
use_retpoline);
case kReturnCall:
return BuildWasmReturnCall(sig, args, position, target_instance,
use_retpoline);
}
}
Node* WasmGraphBuilder::BuildLoadFunctionDataFromJSFunction(Node* js_function) {
Node* shared = gasm_->Load(
MachineType::AnyTagged(), js_function,
wasm::ObjectAccess::SharedFunctionInfoOffsetInTaggedJSFunction());
return gasm_->Load(MachineType::AnyTagged(), shared,
SharedFunctionInfo::kFunctionDataOffset - kHeapObjectTag);
}
Node* WasmGraphBuilder::BuildLoadJumpTableOffsetFromExportedFunctionData(
Node* function_data) {
Node* jump_table_offset_smi = gasm_->Load(
MachineType::TaggedSigned(), function_data,
WasmExportedFunctionData::kJumpTableOffsetOffset - kHeapObjectTag);
return BuildChangeSmiToIntPtr(jump_table_offset_smi);
}
Node* WasmGraphBuilder::BuildLoadFunctionIndexFromExportedFunctionData(
Node* function_data) {
Node* function_index_smi = gasm_->Load(
MachineType::TaggedSigned(), function_data,
WasmExportedFunctionData::kFunctionIndexOffset - kHeapObjectTag);
Node* function_index = BuildChangeSmiToInt32(function_index_smi);
return function_index;
}
Node* HasInstanceType(WasmGraphAssembler* gasm, Node* object,
InstanceType type) {
Node* map = gasm->Load(MachineType::TaggedPointer(), object,
wasm::ObjectAccess::ToTagged(HeapObject::kMapOffset));
Node* instance_type =
gasm->Load(MachineType::Uint16(), map,
wasm::ObjectAccess::ToTagged(Map::kInstanceTypeOffset));
return gasm->Word32Equal(instance_type, gasm->Int32Constant(type));
}
Node* WasmGraphBuilder::BuildCallRef(uint32_t sig_index, Vector<Node*> args,
Vector<Node*> rets,
CheckForNull null_check,
IsReturnCall continuation,
wasm::WasmCodePosition position) {
if (null_check == kWithNullCheck) {
TrapIfTrue(wasm::kTrapNullDereference, gasm_->WordEqual(args[0], RefNull()),
position);
}
const wasm::FunctionSig* sig = env_->module->signature(sig_index);
Node* function_data = BuildLoadFunctionDataFromJSFunction(args[0]);
Node* is_js_function =
HasInstanceType(gasm_.get(), function_data, WASM_JS_FUNCTION_DATA_TYPE);
auto js_label = gasm_->MakeLabel();
auto end_label = gasm_->MakeLabel(MachineRepresentation::kTaggedPointer,
MachineRepresentation::kTaggedPointer);
gasm_->GotoIf(is_js_function, &js_label);
{
// Call to a WasmExportedFunction.
// Load instance object corresponding to module where callee is defined.
Node* callee_instance =
gasm_->Load(MachineType::TaggedPointer(), function_data,
wasm::ObjectAccess::ToTagged(
WasmExportedFunctionData::kInstanceOffset));
Node* function_index =
gasm_->Load(MachineType::TaggedPointer(), function_data,
wasm::ObjectAccess::ToTagged(
WasmExportedFunctionData::kFunctionIndexOffset));
auto imported_label = gasm_->MakeLabel();
// Check if callee is a locally defined or imported function it its module.
Node* imported_function_refs =
gasm_->Load(MachineType::TaggedPointer(), callee_instance,
wasm::ObjectAccess::ToTagged(
WasmInstanceObject::kImportedFunctionRefsOffset));
Node* imported_functions_num =
gasm_->Load(MachineType::TaggedPointer(), imported_function_refs,
wasm::ObjectAccess::ToTagged(FixedArray::kLengthOffset));
gasm_->GotoIf(gasm_->SmiLessThan(function_index, imported_functions_num),
&imported_label);
{
// Function locally defined in module.
Node* jump_table_start =
gasm_->Load(MachineType::Pointer(), callee_instance,
wasm::ObjectAccess::ToTagged(
WasmInstanceObject::kJumpTableStartOffset));
Node* jump_table_offset =
BuildLoadJumpTableOffsetFromExportedFunctionData(function_data);
Node* jump_table_slot =
gasm_->IntAdd(jump_table_start, jump_table_offset);
gasm_->Goto(&end_label, jump_table_slot,
callee_instance /* Unused, dummy value */);
}
{
// Function imported to module.
gasm_->Bind(&imported_label);
Node* imported_instance = gasm_->Load(
MachineType::TaggedPointer(), imported_function_refs,
gasm_->Int32Add(
gasm_->Int32Mul(BuildChangeSmiToInt32(function_index),
gasm_->Int32Constant(kTaggedSize)),
gasm_->Int32Constant(FixedArray::kHeaderSize - kHeapObjectTag)));
Node* imported_function_targets =
gasm_->Load(MachineType::Pointer(), callee_instance,
wasm::ObjectAccess::ToTagged(
WasmInstanceObject::kImportedFunctionTargetsOffset));
Node* target_node =
gasm_->Load(MachineType::Pointer(), imported_function_targets,
gasm_->IntMul(BuildChangeSmiToIntPtr(function_index),
gasm_->IntPtrConstant(kSystemPointerSize)));
gasm_->Goto(&end_label, target_node, imported_instance);
}
}
{
// Call to a WasmJSFunction. The call target is
// function_data->wasm_to_js_wrapper_code()->instruction_start().
// The instance_node is the pair
// (current WasmInstanceObject, function_data->callable()).
gasm_->Bind(&js_label);
Node* wrapper_code =
gasm_->Load(MachineType::TaggedPointer(), function_data,
wasm::ObjectAccess::ToTagged(
WasmJSFunctionData::kWasmToJsWrapperCodeOffset));
Node* call_target = gasm_->IntAdd(
wrapper_code,
gasm_->IntPtrConstant(wasm::ObjectAccess::ToTagged(Code::kHeaderSize)));
Node* callable = gasm_->Load(
MachineType::TaggedPointer(), function_data,
wasm::ObjectAccess::ToTagged(WasmJSFunctionData::kCallableOffset));
// TODO(manoskouk): Find an elegant way to avoid allocating this pair for
// every call.
Node* function_instance_node = CALL_BUILTIN(
WasmAllocatePair, instance_node_.get(), callable,
LOAD_INSTANCE_FIELD(NativeContext, MachineType::TaggedPointer()));
gasm_->Goto(&end_label, call_target, function_instance_node);
}
gasm_->Bind(&end_label);
args[0] = end_label.PhiAt(0);
Node* instance_node = end_label.PhiAt(1);
const UseRetpoline use_retpoline =
untrusted_code_mitigations_ ? kRetpoline : kNoRetpoline;
Node* call = continuation == kCallContinues
? BuildWasmCall(sig, args, rets, position, instance_node,
use_retpoline)
: BuildWasmReturnCall(sig, args, position, instance_node,
use_retpoline);
return call;
}
Node* WasmGraphBuilder::CallRef(uint32_t sig_index, Vector<Node*> args,
Vector<Node*> rets,
WasmGraphBuilder::CheckForNull null_check,
wasm::WasmCodePosition position) {
return BuildCallRef(sig_index, args, rets, null_check,
IsReturnCall::kCallContinues, position);
}
Node* WasmGraphBuilder::ReturnCallRef(uint32_t sig_index, Vector<Node*> args,
WasmGraphBuilder::CheckForNull null_check,
wasm::WasmCodePosition position) {
return BuildCallRef(sig_index, args, {}, null_check,
IsReturnCall::kReturnCall, position);
}
Node* WasmGraphBuilder::ReturnCall(uint32_t index, Vector<Node*> args,
wasm::WasmCodePosition position) {
DCHECK_NULL(args[0]);
const wasm::FunctionSig* sig = env_->module->functions[index].sig;
if (env_ && index < env_->module->num_imported_functions) {
// Return Call to an imported function.
return BuildImportCall(sig, args, {}, position, index, kReturnCall);
}
// A direct tail call to a wasm function defined in this module.
// Just encode the function index. This will be patched during code
// generation.
Address code = static_cast<Address>(index);
args[0] = mcgraph()->RelocatableIntPtrConstant(code, RelocInfo::WASM_CALL);
return BuildWasmReturnCall(sig, args, position, nullptr, kNoRetpoline);
}
Node* WasmGraphBuilder::ReturnCallIndirect(uint32_t table_index,
uint32_t sig_index,
Vector<Node*> args,
wasm::WasmCodePosition position) {
return BuildIndirectCall(table_index, sig_index, args, {}, position,
kReturnCall);
}
Node* WasmGraphBuilder::BrOnNull(Node* ref_object, Node** null_node,
Node** non_null_node) {
BranchExpectFalse(gasm_->WordEqual(ref_object, RefNull()), null_node,
non_null_node);
// Return value is not used, but we need it for compatibility
// with graph-builder-interface.
return nullptr;
}
Node* WasmGraphBuilder::BuildI32Rol(Node* left, Node* right) {
// Implement Rol by Ror since TurboFan does not have Rol opcode.
// TODO(weiliang): support Word32Rol opcode in TurboFan.
Int32Matcher m(right);
if (m.HasResolvedValue()) {
return Binop(wasm::kExprI32Ror, left,
mcgraph()->Int32Constant(32 - (m.ResolvedValue() & 0x1F)));
} else {
return Binop(wasm::kExprI32Ror, left,
Binop(wasm::kExprI32Sub, mcgraph()->Int32Constant(32), right));
}
}
Node* WasmGraphBuilder::BuildI64Rol(Node* left, Node* right) {
// Implement Rol by Ror since TurboFan does not have Rol opcode.
// TODO(weiliang): support Word64Rol opcode in TurboFan.
Int64Matcher m(right);
Node* inv_right =
m.HasResolvedValue()
? mcgraph()->Int64Constant(64 - (m.ResolvedValue() & 0x3F))
: Binop(wasm::kExprI64Sub, mcgraph()->Int64Constant(64), right);
return Binop(wasm::kExprI64Ror, left, inv_right);
}
Node* WasmGraphBuilder::Invert(Node* node) {
return Unop(wasm::kExprI32Eqz, node);
}
Node* WasmGraphBuilder::BuildTruncateIntPtrToInt32(Node* value) {
return mcgraph()->machine()->Is64() ? gasm_->TruncateInt64ToInt32(value)
: value;
}
Node* WasmGraphBuilder::BuildChangeInt32ToIntPtr(Node* value) {
return mcgraph()->machine()->Is64() ? gasm_->ChangeInt32ToInt64(value)
: value;
}
Node* WasmGraphBuilder::BuildChangeInt32ToSmi(Node* value) {
// With pointer compression, only the lower 32 bits are used.
return COMPRESS_POINTERS_BOOL
? gasm_->Word32Shl(value, BuildSmiShiftBitsConstant32())
: gasm_->WordShl(BuildChangeInt32ToIntPtr(value),
BuildSmiShiftBitsConstant());
}
Node* WasmGraphBuilder::BuildChangeUint31ToSmi(Node* value) {
return COMPRESS_POINTERS_BOOL
? gasm_->Word32Shl(value, BuildSmiShiftBitsConstant32())
: graph()->NewNode(mcgraph()->machine()->WordShl(),
Uint32ToUintptr(value),
BuildSmiShiftBitsConstant());
}
Node* WasmGraphBuilder::BuildSmiShiftBitsConstant() {
return gasm_->IntPtrConstant(kSmiShiftSize + kSmiTagSize);
}
Node* WasmGraphBuilder::BuildSmiShiftBitsConstant32() {
return gasm_->Int32Constant(kSmiShiftSize + kSmiTagSize);
}
Node* WasmGraphBuilder::BuildChangeSmiToInt32(Node* value) {
return COMPRESS_POINTERS_BOOL
? gasm_->Word32Sar(gasm_->TruncateInt64ToInt32(value),
BuildSmiShiftBitsConstant32())
: BuildTruncateIntPtrToInt32(BuildChangeSmiToIntPtr(value));
}
Node* WasmGraphBuilder::BuildChangeSmiToIntPtr(Node* value) {
if (COMPRESS_POINTERS_BOOL) {
value = BuildChangeSmiToInt32(value);
return BuildChangeInt32ToIntPtr(value);
}
return graph()->NewNode(mcgraph()->machine()->WordSar(), value,
BuildSmiShiftBitsConstant());
}
Node* WasmGraphBuilder::BuildConvertUint32ToSmiWithSaturation(Node* value,
uint32_t maxval) {
DCHECK(Smi::IsValid(maxval));
Node* max = mcgraph()->Uint32Constant(maxval);
Node* check = graph()->NewNode(mcgraph()->machine()->Uint32LessThanOrEqual(),
value, max);
Node* valsmi = BuildChangeUint31ToSmi(value);
Node* maxsmi = graph()->NewNode(mcgraph()->common()->NumberConstant(maxval));
Diamond d(graph(), mcgraph()->common(), check, BranchHint::kTrue);
d.Chain(control());
return d.Phi(MachineRepresentation::kTagged, valsmi, maxsmi);
}
void WasmGraphBuilder::InitInstanceCache(
WasmInstanceCacheNodes* instance_cache) {
DCHECK_NOT_NULL(instance_node_);
// Load the memory start.
instance_cache->mem_start =
LOAD_INSTANCE_FIELD(MemoryStart, MachineType::UintPtr());
// Load the memory size.
instance_cache->mem_size =
LOAD_INSTANCE_FIELD(MemorySize, MachineType::UintPtr());
if (untrusted_code_mitigations_) {
// Load the memory mask.
instance_cache->mem_mask =
LOAD_INSTANCE_FIELD(MemoryMask, MachineType::UintPtr());
} else {
// Explicitly set to nullptr to ensure a SEGV when we try to use it.
instance_cache->mem_mask = nullptr;
}
}
void WasmGraphBuilder::PrepareInstanceCacheForLoop(
WasmInstanceCacheNodes* instance_cache, Node* control) {
#define INTRODUCE_PHI(field, rep) \
instance_cache->field = graph()->NewNode(mcgraph()->common()->Phi(rep, 1), \
instance_cache->field, control);
INTRODUCE_PHI(mem_start, MachineType::PointerRepresentation());
INTRODUCE_PHI(mem_size, MachineType::PointerRepresentation());
if (untrusted_code_mitigations_) {
INTRODUCE_PHI(mem_mask, MachineType::PointerRepresentation());
}
#undef INTRODUCE_PHI
}
void WasmGraphBuilder::NewInstanceCacheMerge(WasmInstanceCacheNodes* to,
WasmInstanceCacheNodes* from,
Node* merge) {
#define INTRODUCE_PHI(field, rep) \
if (to->field != from->field) { \
Node* vals[] = {to->field, from->field, merge}; \
to->field = graph()->NewNode(mcgraph()->common()->Phi(rep, 2), 3, vals); \
}
INTRODUCE_PHI(mem_start, MachineType::PointerRepresentation());
INTRODUCE_PHI(mem_size, MachineRepresentation::kWord32);
if (untrusted_code_mitigations_) {
INTRODUCE_PHI(mem_mask, MachineRepresentation::kWord32);
}
#undef INTRODUCE_PHI
}
void WasmGraphBuilder::MergeInstanceCacheInto(WasmInstanceCacheNodes* to,
WasmInstanceCacheNodes* from,
Node* merge) {
to->mem_size = CreateOrMergeIntoPhi(MachineType::PointerRepresentation(),
merge, to->mem_size, from->mem_size);
to->mem_start = CreateOrMergeIntoPhi(MachineType::PointerRepresentation(),
merge, to->mem_start, from->mem_start);
if (untrusted_code_mitigations_) {
to->mem_mask = CreateOrMergeIntoPhi(MachineType::PointerRepresentation(),
merge, to->mem_mask, from->mem_mask);
}
}
Node* WasmGraphBuilder::CreateOrMergeIntoPhi(MachineRepresentation rep,
Node* merge, Node* tnode,
Node* fnode) {
if (IsPhiWithMerge(tnode, merge)) {
AppendToPhi(tnode, fnode);
} else if (tnode != fnode) {
// Note that it is not safe to use {Buffer} here since this method is used
// via {CheckForException} while the {Buffer} is in use by another method.
uint32_t count = merge->InputCount();
// + 1 for the merge node.
base::SmallVector<Node*, 9> inputs(count + 1);
for (uint32_t j = 0; j < count - 1; j++) inputs[j] = tnode;
inputs[count - 1] = fnode;
inputs[count] = merge;
tnode = graph()->NewNode(mcgraph()->common()->Phi(rep, count), count + 1,
inputs.begin());
}
return tnode;
}
Node* WasmGraphBuilder::CreateOrMergeIntoEffectPhi(Node* merge, Node* tnode,
Node* fnode) {
if (IsPhiWithMerge(tnode, merge)) {
AppendToPhi(tnode, fnode);
} else if (tnode != fnode) {
// Note that it is not safe to use {Buffer} here since this method is used
// via {CheckForException} while the {Buffer} is in use by another method.
uint32_t count = merge->InputCount();
// + 1 for the merge node.
base::SmallVector<Node*, 9> inputs(count + 1);
for (uint32_t j = 0; j < count - 1; j++) {
inputs[j] = tnode;
}
inputs[count - 1] = fnode;
inputs[count] = merge;
tnode = graph()->NewNode(mcgraph()->common()->EffectPhi(count), count + 1,
inputs.begin());
}
return tnode;
}
Node* WasmGraphBuilder::effect() { return gasm_->effect(); }
Node* WasmGraphBuilder::control() { return gasm_->control(); }
Node* WasmGraphBuilder::SetEffect(Node* node) {
SetEffectControl(node, control());
return node;
}
Node* WasmGraphBuilder::SetControl(Node* node) {
SetEffectControl(effect(), node);
return node;
}
void WasmGraphBuilder::SetEffectControl(Node* effect, Node* control) {
gasm_->InitializeEffectControl(effect, control);
}
Node* WasmGraphBuilder::GetImportedMutableGlobals() {
if (imported_mutable_globals_ == nullptr) {
// Load imported_mutable_globals_ from the instance object at runtime.
imported_mutable_globals_ = graph()->NewNode(
mcgraph()->machine()->Load(MachineType::UintPtr()),
instance_node_.get(),
mcgraph()->Int32Constant(
WASM_INSTANCE_OBJECT_OFFSET(ImportedMutableGlobals)),
graph()->start(), graph()->start());
}
return imported_mutable_globals_.get();
}
void WasmGraphBuilder::GetGlobalBaseAndOffset(MachineType mem_type,
const wasm::WasmGlobal& global,
Node** base_node,
Node** offset_node) {
DCHECK_NOT_NULL(instance_node_);
if (global.mutability && global.imported) {
*base_node = SetEffect(graph()->NewNode(
mcgraph()->machine()->Load(MachineType::UintPtr()),
GetImportedMutableGlobals(),
mcgraph()->Int32Constant(global.index * sizeof(Address)), effect(),
control()));
*offset_node = mcgraph()->Int32Constant(0);
} else {
if (globals_start_ == nullptr) {
// Load globals_start from the instance object at runtime.
// TODO(wasm): we currently generate only one load of the {globals_start}
// start per graph, which means it can be placed anywhere by the
// scheduler. This is legal because the globals_start should never change.
// However, in some cases (e.g. if the instance object is already in a
// register), it is slightly more efficient to reload this value from the
// instance object. Since this depends on register allocation, it is not
// possible to express in the graph, and would essentially constitute a
// "mem2reg" optimization in TurboFan.
globals_start_ = graph()->NewNode(
mcgraph()->machine()->Load(MachineType::UintPtr()),
instance_node_.get(),
mcgraph()->Int32Constant(WASM_INSTANCE_OBJECT_OFFSET(GlobalsStart)),
graph()->start(), graph()->start());
}
*base_node = globals_start_.get();
*offset_node = mcgraph()->Int32Constant(global.offset);
if (mem_type == MachineType::Simd128() && global.offset != 0) {
// TODO(titzer,bbudge): code generation for SIMD memory offsets is broken.
*base_node = graph()->NewNode(mcgraph()->machine()->IntAdd(), *base_node,
*offset_node);
*offset_node = mcgraph()->Int32Constant(0);
}
}
}
void WasmGraphBuilder::GetBaseAndOffsetForImportedMutableExternRefGlobal(
const wasm::WasmGlobal& global, Node** base, Node** offset) {
// Load the base from the ImportedMutableGlobalsBuffer of the instance.
Node* buffers = LOAD_INSTANCE_FIELD(ImportedMutableGlobalsBuffers,
MachineType::TaggedPointer());
*base = LOAD_FIXED_ARRAY_SLOT_ANY(buffers, global.index);
// For the offset we need the index of the global in the buffer, and then
// calculate the actual offset from the index. Load the index from the
// ImportedMutableGlobals array of the instance.
Node* index = SetEffect(
graph()->NewNode(mcgraph()->machine()->Load(MachineType::UintPtr()),
GetImportedMutableGlobals(),
mcgraph()->Int32Constant(global.index * sizeof(Address)),
effect(), control()));
// From the index, calculate the actual offset in the FixeArray. This
// is kHeaderSize + (index * kTaggedSize). kHeaderSize can be acquired with
// wasm::ObjectAccess::ElementOffsetInTaggedFixedArray(0).
Node* index_times_tagged_size =
graph()->NewNode(mcgraph()->machine()->IntMul(), Uint32ToUintptr(index),
mcgraph()->Int32Constant(kTaggedSize));
*offset = graph()->NewNode(
mcgraph()->machine()->IntAdd(), index_times_tagged_size,
mcgraph()->IntPtrConstant(
wasm::ObjectAccess::ElementOffsetInTaggedFixedArray(0)));
}
Node* WasmGraphBuilder::MemBuffer(uintptr_t offset) {
DCHECK_NOT_NULL(instance_cache_);
Node* mem_start = instance_cache_->mem_start;
DCHECK_NOT_NULL(mem_start);
if (offset == 0) return mem_start;
return gasm_->IntAdd(mem_start, gasm_->UintPtrConstant(offset));
}
Node* WasmGraphBuilder::CurrentMemoryPages() {
// CurrentMemoryPages can not be called from asm.js.
DCHECK_EQ(wasm::kWasmOrigin, env_->module->origin);
DCHECK_NOT_NULL(instance_cache_);
Node* mem_size = instance_cache_->mem_size;
DCHECK_NOT_NULL(mem_size);
Node* result =
graph()->NewNode(mcgraph()->machine()->WordShr(), mem_size,
mcgraph()->Int32Constant(wasm::kWasmPageSizeLog2));
result = BuildTruncateIntPtrToInt32(result);
return result;
}
// Only call this function for code which is not reused across instantiations,
// as we do not patch the embedded js_context.
Node* WasmGraphBuilder::BuildCallToRuntimeWithContext(Runtime::FunctionId f,
Node* js_context,
Node** parameters,
int parameter_count) {
const Runtime::Function* fun = Runtime::FunctionForId(f);
auto call_descriptor = Linkage::GetRuntimeCallDescriptor(
mcgraph()->zone(), f, fun->nargs, Operator::kNoProperties,
CallDescriptor::kNoFlags);
// The CEntryStub is loaded from the IsolateRoot so that generated code is
// Isolate independent. At the moment this is only done for CEntryStub(1).
Node* isolate_root = BuildLoadIsolateRoot();
DCHECK_EQ(1, fun->result_size);
auto centry_id =
Builtins::kCEntry_Return1_DontSaveFPRegs_ArgvOnStack_NoBuiltinExit;
Node* centry_stub = LOAD_FULL_POINTER(
isolate_root, IsolateData::builtin_slot_offset(centry_id));
// TODO(titzer): allow arbitrary number of runtime arguments
// At the moment we only allow 5 parameters. If more parameters are needed,
// increase this constant accordingly.
static const int kMaxParams = 5;
DCHECK_GE(kMaxParams, parameter_count);
Node* inputs[kMaxParams + 6];
int count = 0;
inputs[count++] = centry_stub;
for (int i = 0; i < parameter_count; i++) {
inputs[count++] = parameters[i];
}
inputs[count++] =
mcgraph()->ExternalConstant(ExternalReference::Create(f)); // ref
inputs[count++] = mcgraph()->Int32Constant(fun->nargs); // arity
inputs[count++] = js_context; // js_context
inputs[count++] = effect();
inputs[count++] = control();
Node* call = mcgraph()->graph()->NewNode(
mcgraph()->common()->Call(call_descriptor), count, inputs);
SetEffect(call);
return call;
}
Node* WasmGraphBuilder::BuildCallToRuntime(Runtime::FunctionId f,
Node** parameters,
int parameter_count) {
return BuildCallToRuntimeWithContext(f, NoContextConstant(), parameters,
parameter_count);
}
Node* WasmGraphBuilder::GlobalGet(uint32_t index) {
const wasm::WasmGlobal& global = env_->module->globals[index];
if (global.type.is_reference_type()) {
if (global.mutability && global.imported) {
Node* base = nullptr;
Node* offset = nullptr;
GetBaseAndOffsetForImportedMutableExternRefGlobal(global, &base, &offset);
return gasm_->Load(MachineType::AnyTagged(), base, offset);
}
Node* globals_buffer =
LOAD_INSTANCE_FIELD(TaggedGlobalsBuffer, MachineType::TaggedPointer());
return LOAD_FIXED_ARRAY_SLOT_ANY(globals_buffer, global.offset);
}
MachineType mem_type = global.type.machine_type();
if (mem_type.representation() == MachineRepresentation::kSimd128) {
has_simd_ = true;
}
Node* base = nullptr;
Node* offset = nullptr;
GetGlobalBaseAndOffset(mem_type, global, &base, &offset);
Node* result = SetEffect(graph()->NewNode(
mcgraph()->machine()->Load(mem_type), base, offset, effect(), control()));
#if defined(V8_TARGET_BIG_ENDIAN)
result = BuildChangeEndiannessLoad(result, mem_type, global.type);
#endif
return result;
}
Node* WasmGraphBuilder::GlobalSet(uint32_t index, Node* val) {
const wasm::WasmGlobal& global = env_->module->globals[index];
if (global.type.is_reference_type()) {
if (global.mutability && global.imported) {
Node* base = nullptr;
Node* offset = nullptr;
GetBaseAndOffsetForImportedMutableExternRefGlobal(global, &base, &offset);
return STORE_RAW_NODE_OFFSET(
base, offset, val, MachineRepresentation::kTagged, kFullWriteBarrier);
}
Node* globals_buffer =
LOAD_INSTANCE_FIELD(TaggedGlobalsBuffer, MachineType::TaggedPointer());
return STORE_FIXED_ARRAY_SLOT_ANY(globals_buffer, global.offset, val);
}
MachineType mem_type = global.type.machine_type();
if (mem_type.representation() == MachineRepresentation::kSimd128) {
has_simd_ = true;
}
Node* base = nullptr;
Node* offset = nullptr;
GetGlobalBaseAndOffset(mem_type, global, &base, &offset);
const Operator* op = mcgraph()->machine()->Store(
StoreRepresentation(mem_type.representation(), kNoWriteBarrier));
#if defined(V8_TARGET_BIG_ENDIAN)
val = BuildChangeEndiannessStore(val, mem_type.representation(), global.type);
#endif
return SetEffect(
graph()->NewNode(op, base, offset, val, effect(), control()));
}
Node* WasmGraphBuilder::TableGet(uint32_t table_index, Node* index,
wasm::WasmCodePosition position) {
auto call_descriptor = GetBuiltinCallDescriptor<WasmTableGetDescriptor>(
this, StubCallMode::kCallWasmRuntimeStub);
// A direct call to a wasm runtime stub defined in this module.
// Just encode the stub index. This will be patched at relocation.
Node* call_target = mcgraph()->RelocatableIntPtrConstant(
wasm::WasmCode::kWasmTableGet, RelocInfo::WASM_STUB_CALL);
return SetEffectControl(graph()->NewNode(
mcgraph()->common()->Call(call_descriptor), call_target,
mcgraph()->IntPtrConstant(table_index), index, effect(), control()));
}
Node* WasmGraphBuilder::TableSet(uint32_t table_index, Node* index, Node* val,
wasm::WasmCodePosition position) {
auto call_descriptor = GetBuiltinCallDescriptor<WasmTableSetDescriptor>(
this, StubCallMode::kCallWasmRuntimeStub);
// A direct call to a wasm runtime stub defined in this module.
// Just encode the stub index. This will be patched at relocation.
Node* call_target = mcgraph()->RelocatableIntPtrConstant(
wasm::WasmCode::kWasmTableSet, RelocInfo::WASM_STUB_CALL);
return gasm_->Call(call_descriptor, call_target,
gasm_->IntPtrConstant(table_index), index, val);
}
Node* WasmGraphBuilder::CheckBoundsAndAlignment(
int8_t access_size, Node* index, uint64_t offset,
wasm::WasmCodePosition position) {
// Atomic operations need bounds checks until the backend can emit protected
// loads.
index =
BoundsCheckMem(access_size, index, offset, position, kNeedsBoundsCheck);
const uintptr_t align_mask = access_size - 1;
// {offset} is validated to be within uintptr_t range in {BoundsCheckMem}.
uintptr_t capped_offset = static_cast<uintptr_t>(offset);
// Don't emit an alignment check if the index is a constant.
// TODO(wasm): a constant match is also done above in {BoundsCheckMem}.
UintPtrMatcher match(index);
if (match.HasResolvedValue()) {
uintptr_t effective_offset = match.ResolvedValue() + capped_offset;
if ((effective_offset & align_mask) != 0) {
// statically known to be unaligned; trap.
TrapIfEq32(wasm::kTrapUnalignedAccess, Int32Constant(0), 0, position);
}
return index;
}
// Unlike regular memory accesses, atomic memory accesses should trap if
// the effective offset is misaligned.
// TODO(wasm): this addition is redundant with one inserted by {MemBuffer}.
Node* effective_offset = gasm_->IntAdd(MemBuffer(capped_offset), index);
Node* cond =
gasm_->WordAnd(effective_offset, gasm_->IntPtrConstant(align_mask));
TrapIfFalse(wasm::kTrapUnalignedAccess,
gasm_->Word32Equal(cond, gasm_->Int32Constant(0)), position);
return index;
}
// Insert code to bounds check a memory access if necessary. Return the
// bounds-checked index, which is guaranteed to have (the equivalent of)
// {uintptr_t} representation.
Node* WasmGraphBuilder::BoundsCheckMem(uint8_t access_size, Node* index,
uint64_t offset,
wasm::WasmCodePosition position,
EnforceBoundsCheck enforce_check) {
DCHECK_LE(1, access_size);
index = Uint32ToUintptr(index);
if (!FLAG_wasm_bounds_checks) return index;
if (use_trap_handler() && enforce_check == kCanOmitBoundsCheck) {
return index;
}
// If the offset does not fit in a uintptr_t, this can never succeed on this
// machine.
if (offset > std::numeric_limits<uintptr_t>::max() ||
!base::IsInBounds<uintptr_t>(offset, access_size,
env_->max_memory_size)) {
// The access will be out of bounds, even for the largest memory.
TrapIfEq32(wasm::kTrapMemOutOfBounds, Int32Constant(0), 0, position);
return gasm_->UintPtrConstant(0);
}
uintptr_t end_offset = offset + access_size - 1u;
Node* end_offset_node = mcgraph_->UintPtrConstant(end_offset);
// The accessed memory is [index + offset, index + end_offset].
// Check that the last read byte (at {index + end_offset}) is in bounds.
// 1) Check that {end_offset < mem_size}. This also ensures that we can safely
// compute {effective_size} as {mem_size - end_offset)}.
// {effective_size} is >= 1 if condition 1) holds.
// 2) Check that {index + end_offset < mem_size} by
// - computing {effective_size} as {mem_size - end_offset} and
// - checking that {index < effective_size}.
Node* mem_size = instance_cache_->mem_size;
if (end_offset >= env_->min_memory_size) {
// The end offset is larger than the smallest memory.
// Dynamically check the end offset against the dynamic memory size.
Node* cond = gasm_->UintLessThan(end_offset_node, mem_size);
TrapIfFalse(wasm::kTrapMemOutOfBounds, cond, position);
} else {
// The end offset is smaller than the smallest memory, so only one check is
// required. Check to see if the index is also a constant.
UintPtrMatcher match(index);
if (match.HasResolvedValue()) {
uintptr_t index_val = match.ResolvedValue();
if (index_val < env_->min_memory_size - end_offset) {
// The input index is a constant and everything is statically within
// bounds of the smallest possible memory.
return index;
}
}
}
// This produces a positive number, since {end_offset < min_size <= mem_size}.
Node* effective_size = gasm_->IntSub(mem_size, end_offset_node);
// Introduce the actual bounds check.
Node* cond = gasm_->UintLessThan(index, effective_size);
TrapIfFalse(wasm::kTrapMemOutOfBounds, cond, position);
if (untrusted_code_mitigations_) {
// In the fallthrough case, condition the index with the memory mask.
Node* mem_mask = instance_cache_->mem_mask;
DCHECK_NOT_NULL(mem_mask);
index = gasm_->WordAnd(index, mem_mask);
}
return index;
}
Node* WasmGraphBuilder::BoundsCheckRange(Node* start, Node** size, Node* max,
wasm::WasmCodePosition position) {
auto m = mcgraph()->machine();
// The region we are trying to access is [start, start+size). If
// {start} > {max}, none of this region is valid, so we trap. Otherwise,
// there may be a subset of the region that is valid. {max - start} is the
// maximum valid size, so if {max - start < size}, then the region is
// partially out-of-bounds.
TrapIfTrue(wasm::kTrapMemOutOfBounds,
graph()->NewNode(m->Uint32LessThan(), max, start), position);
Node* sub = graph()->NewNode(m->Int32Sub(), max, start);
Node* fail = graph()->NewNode(m->Uint32LessThan(), sub, *size);
Diamond d(graph(), mcgraph()->common(), fail, BranchHint::kFalse);
d.Chain(control());
*size = d.Phi(MachineRepresentation::kWord32, sub, *size);
return fail;
}
Node* WasmGraphBuilder::BoundsCheckMemRange(Node** start, Node** size,
wasm::WasmCodePosition position) {
// TODO(binji): Support trap handler and no bounds check mode.
Node* fail =
BoundsCheckRange(*start, size, instance_cache_->mem_size, position);
*start = graph()->NewNode(mcgraph()->machine()->IntAdd(), MemBuffer(0),
Uint32ToUintptr(*start));
return fail;
}
const Operator* WasmGraphBuilder::GetSafeLoadOperator(int offset,
wasm::ValueType type) {
int alignment = offset % type.element_size_bytes();
MachineType mach_type = type.machine_type();
if (COMPRESS_POINTERS_BOOL && mach_type.IsTagged()) {
// We are loading tagged value from off-heap location, so we need to load
// it as a full word otherwise we will not be able to decompress it.
mach_type = MachineType::Pointer();
}
if (alignment == 0 || mcgraph()->machine()->UnalignedLoadSupported(
type.machine_representation())) {
return mcgraph()->machine()->Load(mach_type);
}
return mcgraph()->machine()->UnalignedLoad(mach_type);
}
const Operator* WasmGraphBuilder::GetSafeStoreOperator(int offset,
wasm::ValueType type) {
int alignment = offset % type.element_size_bytes();
MachineRepresentation rep = type.machine_representation();
if (COMPRESS_POINTERS_BOOL && IsAnyTagged(rep)) {
// We are storing tagged value to off-heap location, so we need to store
// it as a full word otherwise we will not be able to decompress it.
rep = MachineType::PointerRepresentation();
}
if (alignment == 0 || mcgraph()->machine()->UnalignedStoreSupported(rep)) {
StoreRepresentation store_rep(rep, WriteBarrierKind::kNoWriteBarrier);
return mcgraph()->machine()->Store(store_rep);
}
UnalignedStoreRepresentation store_rep(rep);
return mcgraph()->machine()->UnalignedStore(store_rep);
}
Node* WasmGraphBuilder::TraceFunctionEntry(wasm::WasmCodePosition position) {
Node* call = BuildCallToRuntime(Runtime::kWasmTraceEnter, nullptr, 0);
SetSourcePosition(call, position);
return call;
}
Node* WasmGraphBuilder::TraceFunctionExit(Vector<Node*> vals,
wasm::WasmCodePosition position) {
Node* info = gasm_->IntPtrConstant(0);
size_t num_returns = vals.size();
if (num_returns == 1) {
wasm::ValueType return_type = sig_->GetReturn(0);
MachineRepresentation rep = return_type.machine_representation();
int size = ElementSizeInBytes(rep);
info = gasm_->StackSlot(size, size);
gasm_->Store(StoreRepresentation(rep, kNoWriteBarrier), info,
gasm_->Int32Constant(0), vals[0]);
}
Node* call = BuildCallToRuntime(Runtime::kWasmTraceExit, &info, 1);
SetSourcePosition(call, position);
return call;
}
Node* WasmGraphBuilder::TraceMemoryOperation(bool is_store,
MachineRepresentation rep,
Node* index, uintptr_t offset,
wasm::WasmCodePosition position) {
int kAlign = 4; // Ensure that the LSB is 0, such that this looks like a Smi.
TNode<RawPtrT> info =
gasm_->StackSlot(sizeof(wasm::MemoryTracingInfo), kAlign);
Node* effective_offset = gasm_->IntAdd(gasm_->UintPtrConstant(offset), index);
auto store = [&](int field_offset, MachineRepresentation rep, Node* data) {
gasm_->Store(StoreRepresentation(rep, kNoWriteBarrier), info,
gasm_->Int32Constant(field_offset), data);
};
// Store effective_offset, is_store, and mem_rep.
store(offsetof(wasm::MemoryTracingInfo, offset),
MachineType::PointerRepresentation(), effective_offset);
store(offsetof(wasm::MemoryTracingInfo, is_store),
MachineRepresentation::kWord8,
mcgraph()->Int32Constant(is_store ? 1 : 0));
store(offsetof(wasm::MemoryTracingInfo, mem_rep),
MachineRepresentation::kWord8,
mcgraph()->Int32Constant(static_cast<int>(rep)));
Node* args[] = {info};
Node* call =
BuildCallToRuntime(Runtime::kWasmTraceMemory, args, arraysize(args));
SetSourcePosition(call, position);
return call;
}
namespace {
LoadTransformation GetLoadTransformation(
MachineType memtype, wasm::LoadTransformationKind transform) {
switch (transform) {
case wasm::LoadTransformationKind::kSplat: {
if (memtype == MachineType::Int8()) {
return LoadTransformation::kS128Load8Splat;
} else if (memtype == MachineType::Int16()) {
return LoadTransformation::kS128Load16Splat;
} else if (memtype == MachineType::Int32()) {
return LoadTransformation::kS128Load32Splat;
} else if (memtype == MachineType::Int64()) {
return LoadTransformation::kS128Load64Splat;
}
break;
}
case wasm::LoadTransformationKind::kExtend: {
if (memtype == MachineType::Int8()) {
return LoadTransformation::kS128Load8x8S;
} else if (memtype == MachineType::Uint8()) {
return LoadTransformation::kS128Load8x8U;
} else if (memtype == MachineType::Int16()) {
return LoadTransformation::kS128Load16x4S;
} else if (memtype == MachineType::Uint16()) {
return LoadTransformation::kS128Load16x4U;
} else if (memtype == MachineType::Int32()) {
return LoadTransformation::kS128Load32x2S;
} else if (memtype == MachineType::Uint32()) {
return LoadTransformation::kS128Load32x2U;
}
break;
}
case wasm::LoadTransformationKind::kZeroExtend: {
if (memtype == MachineType::Int32()) {
return LoadTransformation::kS128Load32Zero;
} else if (memtype == MachineType::Int64()) {
return LoadTransformation::kS128Load64Zero;
}
break;
}
}
UNREACHABLE();
}
MemoryAccessKind GetMemoryAccessKind(MachineGraph* mcgraph, MachineType memtype,
bool use_trap_handler) {
if (memtype.representation() == MachineRepresentation::kWord8 ||
mcgraph->machine()->UnalignedLoadSupported(memtype.representation())) {
if (use_trap_handler) {
return MemoryAccessKind::kProtected;
}
return MemoryAccessKind::kNormal;
}
// TODO(eholk): Support unaligned loads with trap handlers.
DCHECK(!use_trap_handler);
return MemoryAccessKind::kUnaligned;
}
} // namespace
// S390 simulator does not execute BE code, hence needs to also check if we are
// running on a LE simulator.
// TODO(miladfar): Remove SIM once V8_TARGET_BIG_ENDIAN includes the Sim.
#if defined(V8_TARGET_BIG_ENDIAN) || defined(V8_TARGET_ARCH_S390_LE_SIM)
Node* WasmGraphBuilder::LoadTransformBigEndian(
wasm::ValueType type, MachineType memtype,
wasm::LoadTransformationKind transform, Node* index, uint64_t offset,
uint32_t alignment, wasm::WasmCodePosition position) {
#define LOAD_EXTEND(num_lanes, bytes_per_load, replace_lane) \
result = graph()->NewNode(mcgraph()->machine()->S128Zero()); \
Node* values[num_lanes]; \
for (int i = 0; i < num_lanes; i++) { \
values[i] = LoadMem(type, memtype, index, offset + i * bytes_per_load, \
alignment, position); \
if (memtype.IsSigned()) { \
/* sign extend */ \
values[i] = graph()->NewNode(mcgraph()->machine()->ChangeInt32ToInt64(), \
values[i]); \
} else { \
/* zero extend */ \
values[i] = graph()->NewNode( \
mcgraph()->machine()->ChangeUint32ToUint64(), values[i]); \
} \
} \
for (int lane = 0; lane < num_lanes; lane++) { \
result = graph()->NewNode(mcgraph()->machine()->replace_lane(lane), \
result, values[lane]); \
}
Node* result;
LoadTransformation transformation = GetLoadTransformation(memtype, transform);
switch (transformation) {
case LoadTransformation::kS128Load8Splat: {
result = LoadMem(type, memtype, index, offset, alignment, position);
result = graph()->NewNode(mcgraph()->machine()->I8x16Splat(), result);
break;
}
case LoadTransformation::kS128Load8x8S:
case LoadTransformation::kS128Load8x8U: {
LOAD_EXTEND(8, 1, I16x8ReplaceLane)
break;
}
case LoadTransformation::kS128Load16Splat: {
result = LoadMem(type, memtype, index, offset, alignment, position);
result = graph()->NewNode(mcgraph()->machine()->I16x8Splat(), result);
break;
}
case LoadTransformation::kS128Load16x4S:
case LoadTransformation::kS128Load16x4U: {
LOAD_EXTEND(4, 2, I32x4ReplaceLane)
break;
}
case LoadTransformation::kS128Load32Splat: {
result = LoadMem(type, memtype, index, offset, alignment, position);
result = graph()->NewNode(mcgraph()->machine()->I32x4Splat(), result);
break;
}
case LoadTransformation::kS128Load32x2S:
case LoadTransformation::kS128Load32x2U: {
LOAD_EXTEND(2, 4, I64x2ReplaceLane)
break;
}
case LoadTransformation::kS128Load64Splat: {
result = LoadMem(type, memtype, index, offset, alignment, position);
result = graph()->NewNode(mcgraph()->machine()->I64x2Splat(), result);
break;
}
case LoadTransformation::kS128Load32Zero: {
result = graph()->NewNode(mcgraph()->machine()->S128Zero());
result = graph()->NewNode(
mcgraph()->machine()->I32x4ReplaceLane(0), result,
LoadMem(type, memtype, index, offset, alignment, position));
break;
}
case LoadTransformation::kS128Load64Zero: {
result = graph()->NewNode(mcgraph()->machine()->S128Zero());
result = graph()->NewNode(
mcgraph()->machine()->I64x2ReplaceLane(0), result,
LoadMem(type, memtype, index, offset, alignment, position));
break;
}
default:
UNREACHABLE();
}
return result;
#undef LOAD_EXTEND
}
#endif
Node* WasmGraphBuilder::LoadLane(MachineType memtype, Node* value, Node* index,
uint32_t offset, uint8_t laneidx,
wasm::WasmCodePosition position) {
has_simd_ = true;
Node* load;
uint8_t access_size = memtype.MemSize();
index =
BoundsCheckMem(access_size, index, offset, position, kCanOmitBoundsCheck);
MemoryAccessKind load_kind =
GetMemoryAccessKind(mcgraph(), memtype, use_trap_handler());
load = SetEffect(graph()->NewNode(
mcgraph()->machine()->LoadLane(load_kind, memtype, laneidx),
MemBuffer(offset), index, value, effect(), control()));
if (load_kind == MemoryAccessKind::kProtected) {
SetSourcePosition(load, position);
}
if (FLAG_trace_wasm_memory) {
TraceMemoryOperation(false, memtype.representation(), index, offset,
position);
}
return load;
}
Node* WasmGraphBuilder::LoadTransform(wasm::ValueType type, MachineType memtype,
wasm::LoadTransformationKind transform,
Node* index, uint64_t offset,
uint32_t alignment,
wasm::WasmCodePosition position) {
has_simd_ = true;
Node* load;
// {offset} is validated to be within uintptr_t range in {BoundsCheckMem}.
uintptr_t capped_offset = static_cast<uintptr_t>(offset);
#if defined(V8_TARGET_BIG_ENDIAN) || defined(V8_TARGET_ARCH_S390_LE_SIM)
// LoadTransform cannot efficiently be executed on BE machines as a
// single operation since loaded bytes need to be reversed first,
// therefore we divide them into separate "load" and "operation" nodes.
load = LoadTransformBigEndian(type, memtype, transform, index, offset,
alignment, position);
USE(GetMemoryAccessKind);
#else
// Wasm semantics throw on OOB. Introduce explicit bounds check and
// conditioning when not using the trap handler.
// Load extends always load 8 bytes.
uint8_t access_size = transform == wasm::LoadTransformationKind::kExtend
? 8
: memtype.MemSize();
index =
BoundsCheckMem(access_size, index, offset, position, kCanOmitBoundsCheck);
LoadTransformation transformation = GetLoadTransformation(memtype, transform);
MemoryAccessKind load_kind =
GetMemoryAccessKind(mcgraph(), memtype, use_trap_handler());
load = SetEffect(graph()->NewNode(
mcgraph()->machine()->LoadTransform(load_kind, transformation),
MemBuffer(capped_offset), index, effect(), control()));
if (load_kind == MemoryAccessKind::kProtected) {
SetSourcePosition(load, position);
}
#endif
if (FLAG_trace_wasm_memory) {
TraceMemoryOperation(false, memtype.representation(), index, capped_offset,
position);
}
return load;
}
Node* WasmGraphBuilder::LoadMem(wasm::ValueType type, MachineType memtype,
Node* index, uint64_t offset,
uint32_t alignment,
wasm::WasmCodePosition position) {
Node* load;
if (memtype.representation() == MachineRepresentation::kSimd128) {
has_simd_ = true;
}
// Wasm semantics throw on OOB. Introduce explicit bounds check and
// conditioning when not using the trap handler.
index = BoundsCheckMem(memtype.MemSize(), index, offset, position,
kCanOmitBoundsCheck);
// {offset} is validated to be within uintptr_t range in {BoundsCheckMem}.
uintptr_t capped_offset = static_cast<uintptr_t>(offset);
if (memtype.representation() == MachineRepresentation::kWord8 ||
mcgraph()->machine()->UnalignedLoadSupported(memtype.representation())) {
if (use_trap_handler()) {
load = gasm_->ProtectedLoad(memtype, MemBuffer(capped_offset), index);
SetSourcePosition(load, position);
} else {
load = gasm_->Load(memtype, MemBuffer(capped_offset), index);
}
} else {
// TODO(eholk): Support unaligned loads with trap handlers.
DCHECK(!use_trap_handler());
load = gasm_->LoadUnaligned(memtype, MemBuffer(capped_offset), index);
}
#if defined(V8_TARGET_BIG_ENDIAN)
load = BuildChangeEndiannessLoad(load, memtype, type);
#endif
if (type == wasm::kWasmI64 &&
ElementSizeInBytes(memtype.representation()) < 8) {
// TODO(titzer): TF zeroes the upper bits of 64-bit loads for subword sizes.
load = memtype.IsSigned()
? gasm_->ChangeInt32ToInt64(load) // sign extend
: gasm_->ChangeUint32ToUint64(load); // zero extend
}
if (FLAG_trace_wasm_memory) {
TraceMemoryOperation(false, memtype.representation(), index, capped_offset,
position);
}
return load;
}
Node* WasmGraphBuilder::StoreLane(MachineRepresentation mem_rep, Node* index,
uint32_t offset, uint32_t alignment,
Node* val, uint8_t laneidx,
wasm::WasmCodePosition position,
wasm::ValueType type) {
Node* store;
has_simd_ = true;
index = BoundsCheckMem(i::ElementSizeInBytes(mem_rep), index, offset,
position, kCanOmitBoundsCheck);
MachineType memtype = MachineType(mem_rep, MachineSemantic::kNone);
MemoryAccessKind load_kind =
GetMemoryAccessKind(mcgraph(), memtype, use_trap_handler());
// {offset} is validated to be within uintptr_t range in {BoundsCheckMem}.
uintptr_t capped_offset = static_cast<uintptr_t>(offset);
store = SetEffect(graph()->NewNode(
mcgraph()->machine()->StoreLane(load_kind, mem_rep, laneidx),
MemBuffer(capped_offset), index, val, effect(), control()));
if (load_kind == MemoryAccessKind::kProtected) {
SetSourcePosition(store, position);
}
if (FLAG_trace_wasm_memory) {
TraceMemoryOperation(true, mem_rep, index, capped_offset, position);
}
return store;
}
Node* WasmGraphBuilder::StoreMem(MachineRepresentation mem_rep, Node* index,
uint64_t offset, uint32_t alignment, Node* val,
wasm::WasmCodePosition position,
wasm::ValueType type) {
Node* store;
if (mem_rep == MachineRepresentation::kSimd128) {
has_simd_ = true;
}
index = BoundsCheckMem(i::ElementSizeInBytes(mem_rep), index, offset,
position, kCanOmitBoundsCheck);
#if defined(V8_TARGET_BIG_ENDIAN)
val = BuildChangeEndiannessStore(val, mem_rep, type);
#endif
// {offset} is validated to be within uintptr_t range in {BoundsCheckMem}.
uintptr_t capped_offset = static_cast<uintptr_t>(offset);
if (mem_rep == MachineRepresentation::kWord8 ||
mcgraph()->machine()->UnalignedStoreSupported(mem_rep)) {
if (use_trap_handler()) {
store =
gasm_->ProtectedStore(mem_rep, MemBuffer(capped_offset), index, val);
SetSourcePosition(store, position);
} else {
store = gasm_->Store(StoreRepresentation{mem_rep, kNoWriteBarrier},
MemBuffer(capped_offset), index, val);
}
} else {
// TODO(eholk): Support unaligned stores with trap handlers.
DCHECK(!use_trap_handler());
UnalignedStoreRepresentation rep(mem_rep);
store = gasm_->StoreUnaligned(rep, MemBuffer(capped_offset), index, val);
}
if (FLAG_trace_wasm_memory) {
TraceMemoryOperation(true, mem_rep, index, capped_offset, position);
}
return store;
}
namespace {
Node* GetAsmJsOOBValue(MachineRepresentation rep, MachineGraph* mcgraph) {
switch (rep) {
case MachineRepresentation::kWord8:
case MachineRepresentation::kWord16:
case MachineRepresentation::kWord32:
return mcgraph->Int32Constant(0);
case MachineRepresentation::kWord64:
return mcgraph->Int64Constant(0);
case MachineRepresentation::kFloat32:
return mcgraph->Float32Constant(std::numeric_limits<float>::quiet_NaN());
case MachineRepresentation::kFloat64:
return mcgraph->Float64Constant(std::numeric_limits<double>::quiet_NaN());
default:
UNREACHABLE();
}
}
} // namespace
Node* WasmGraphBuilder::BuildAsmjsLoadMem(MachineType type, Node* index) {
DCHECK_NOT_NULL(instance_cache_);
Node* mem_start = instance_cache_->mem_start;
Node* mem_size = instance_cache_->mem_size;
DCHECK_NOT_NULL(mem_start);
DCHECK_NOT_NULL(mem_size);
// Asm.js semantics are defined in terms of typed arrays, hence OOB
// reads return {undefined} coerced to the result type (0 for integers, NaN
// for float and double).
// Note that we check against the memory size ignoring the size of the
// stored value, which is conservative if misaligned. Technically, asm.js
// should never have misaligned accesses.
index = Uint32ToUintptr(index);
Diamond bounds_check(
graph(), mcgraph()->common(),
graph()->NewNode(mcgraph()->machine()->UintLessThan(), index, mem_size),
BranchHint::kTrue);
bounds_check.Chain(control());
if (untrusted_code_mitigations_) {
// Condition the index with the memory mask.
Node* mem_mask = instance_cache_->mem_mask;
DCHECK_NOT_NULL(mem_mask);
index = graph()->NewNode(mcgraph()->machine()->WordAnd(), index, mem_mask);
}
Node* load = graph()->NewNode(mcgraph()->machine()->Load(type), mem_start,
index, effect(), bounds_check.if_true);
SetEffectControl(bounds_check.EffectPhi(load, effect()), bounds_check.merge);
return bounds_check.Phi(type.representation(), load,
GetAsmJsOOBValue(type.representation(), mcgraph()));
}
Node* WasmGraphBuilder::Uint32ToUintptr(Node* node) {
if (mcgraph()->machine()->Is32()) return node;
// Fold instances of ChangeUint32ToUint64(IntConstant) directly.
Uint32Matcher matcher(node);
if (matcher.HasResolvedValue()) {
uintptr_t value = matcher.ResolvedValue();
return mcgraph()->IntPtrConstant(bit_cast<intptr_t>(value));
}
return graph()->NewNode(mcgraph()->machine()->ChangeUint32ToUint64(), node);
}
Node* WasmGraphBuilder::BuildAsmjsStoreMem(MachineType type, Node* index,
Node* val) {
DCHECK_NOT_NULL(instance_cache_);
Node* mem_start = instance_cache_->mem_start;
Node* mem_size = instance_cache_->mem_size;
DCHECK_NOT_NULL(mem_start);
DCHECK_NOT_NULL(mem_size);
// Asm.js semantics are to ignore OOB writes.
// Note that we check against the memory size ignoring the size of the
// stored value, which is conservative if misaligned. Technically, asm.js
// should never have misaligned accesses.
Diamond bounds_check(
graph(), mcgraph()->common(),
graph()->NewNode(mcgraph()->machine()->Uint32LessThan(), index, mem_size),
BranchHint::kTrue);
bounds_check.Chain(control());
if (untrusted_code_mitigations_) {
// Condition the index with the memory mask.
Node* mem_mask = instance_cache_->mem_mask;
DCHECK_NOT_NULL(mem_mask);
index =
graph()->NewNode(mcgraph()->machine()->Word32And(), index, mem_mask);
}
index = Uint32ToUintptr(index);
const Operator* store_op = mcgraph()->machine()->Store(StoreRepresentation(
type.representation(), WriteBarrierKind::kNoWriteBarrier));
Node* store = graph()->NewNode(store_op, mem_start, index, val, effect(),
bounds_check.if_true);
SetEffectControl(bounds_check.EffectPhi(store, effect()), bounds_check.merge);
return val;
}
Node* WasmGraphBuilder::BuildF64x2Ceil(Node* input) {
MachineType type = MachineType::Simd128();
ExternalReference ref = ExternalReference::wasm_f64x2_ceil();
return BuildCFuncInstruction(ref, type, input);
}
Node* WasmGraphBuilder::BuildF64x2Floor(Node* input) {
MachineType type = MachineType::Simd128();
ExternalReference ref = ExternalReference::wasm_f64x2_floor();
return BuildCFuncInstruction(ref, type, input);
}
Node* WasmGraphBuilder::BuildF64x2Trunc(Node* input) {
MachineType type = MachineType::Simd128();
ExternalReference ref = ExternalReference::wasm_f64x2_trunc();
return BuildCFuncInstruction(ref, type, input);
}
Node* WasmGraphBuilder::BuildF64x2NearestInt(Node* input) {
MachineType type = MachineType::Simd128();
ExternalReference ref = ExternalReference::wasm_f64x2_nearest_int();
return BuildCFuncInstruction(ref, type, input);
}
Node* WasmGraphBuilder::BuildF32x4Ceil(Node* input) {
MachineType type = MachineType::Simd128();
ExternalReference ref = ExternalReference::wasm_f32x4_ceil();
return BuildCFuncInstruction(ref, type, input);
}
Node* WasmGraphBuilder::BuildF32x4Floor(Node* input) {
MachineType type = MachineType::Simd128();
ExternalReference ref = ExternalReference::wasm_f32x4_floor();
return BuildCFuncInstruction(ref, type, input);
}
Node* WasmGraphBuilder::BuildF32x4Trunc(Node* input) {
MachineType type = MachineType::Simd128();
ExternalReference ref = ExternalReference::wasm_f32x4_trunc();
return BuildCFuncInstruction(ref, type, input);
}
Node* WasmGraphBuilder::BuildF32x4NearestInt(Node* input) {
MachineType type = MachineType::Simd128();
ExternalReference ref = ExternalReference::wasm_f32x4_nearest_int();
return BuildCFuncInstruction(ref, type, input);
}
void WasmGraphBuilder::PrintDebugName(Node* node) {
PrintF("#%d:%s", node->id(), node->op()->mnemonic());
}
Graph* WasmGraphBuilder::graph() { return mcgraph()->graph(); }
namespace {
Signature<MachineRepresentation>* CreateMachineSignature(
Zone* zone, const wasm::FunctionSig* sig,
WasmGraphBuilder::CallOrigin origin) {
Signature<MachineRepresentation>::Builder builder(zone, sig->return_count(),
sig->parameter_count());
for (auto ret : sig->returns()) {
if (origin == WasmGraphBuilder::kCalledFromJS) {
builder.AddReturn(MachineRepresentation::kTagged);
} else {
builder.AddReturn(ret.machine_representation());
}
}
for (auto param : sig->parameters()) {
if (origin == WasmGraphBuilder::kCalledFromJS) {
// Parameters coming from JavaScript are always tagged values. Especially
// when the signature says that it's an I64 value, then a BigInt object is
// provided by JavaScript, and not two 32-bit parameters.
builder.AddParam(MachineRepresentation::kTagged);
} else {
builder.AddParam(param.machine_representation());
}
}
return builder.Build();
}
} // namespace
void WasmGraphBuilder::AddInt64LoweringReplacement(
CallDescriptor* original, CallDescriptor* replacement) {
if (!lowering_special_case_) {
lowering_special_case_ = std::make_unique<Int64LoweringSpecialCase>();
}
lowering_special_case_->replacements.insert({original, replacement});
}
CallDescriptor* WasmGraphBuilder::GetI32AtomicWaitCallDescriptor() {
if (i32_atomic_wait_descriptor_) return i32_atomic_wait_descriptor_;
i32_atomic_wait_descriptor_ =
GetBuiltinCallDescriptor<WasmI32AtomicWait64Descriptor>(
this, StubCallMode::kCallWasmRuntimeStub);
AddInt64LoweringReplacement(
i32_atomic_wait_descriptor_,
GetBuiltinCallDescriptor<WasmI32AtomicWait32Descriptor>(
this, StubCallMode::kCallWasmRuntimeStub));
return i32_atomic_wait_descriptor_;
}
CallDescriptor* WasmGraphBuilder::GetI64AtomicWaitCallDescriptor() {
if (i64_atomic_wait_descriptor_) return i64_atomic_wait_descriptor_;
i64_atomic_wait_descriptor_ =
GetBuiltinCallDescriptor<WasmI64AtomicWait64Descriptor>(
this, StubCallMode::kCallWasmRuntimeStub);
AddInt64LoweringReplacement(
i64_atomic_wait_descriptor_,
GetBuiltinCallDescriptor<WasmI64AtomicWait32Descriptor>(
this, StubCallMode::kCallWasmRuntimeStub));
return i64_atomic_wait_descriptor_;
}
void WasmGraphBuilder::LowerInt64(Signature<MachineRepresentation>* sig) {
if (mcgraph()->machine()->Is64()) return;
Int64Lowering r(mcgraph()->graph(), mcgraph()->machine(), mcgraph()->common(),
mcgraph()->zone(), sig, std::move(lowering_special_case_));
r.LowerGraph();
}
void WasmGraphBuilder::LowerInt64(CallOrigin origin) {
LowerInt64(CreateMachineSignature(mcgraph()->zone(), sig_, origin));
}
void WasmGraphBuilder::SimdScalarLoweringForTesting() {
SimdScalarLowering(mcgraph(), CreateMachineSignature(mcgraph()->zone(), sig_,
kCalledFromWasm))
.LowerGraph();
}
void WasmGraphBuilder::SetSourcePosition(Node* node,
wasm::WasmCodePosition position) {
DCHECK_NE(position, wasm::kNoCodePosition);
if (source_position_table_) {
source_position_table_->SetSourcePosition(node, SourcePosition(position));
}
}
Node* WasmGraphBuilder::S128Zero() {
has_simd_ = true;
return graph()->NewNode(mcgraph()->machine()->S128Zero());
}
Node* WasmGraphBuilder::SimdOp(wasm::WasmOpcode opcode, Node* const* inputs) {
has_simd_ = true;
switch (opcode) {
case wasm::kExprF64x2Splat:
return graph()->NewNode(mcgraph()->machine()->F64x2Splat(), inputs[0]);
case wasm::kExprF64x2Abs:
return graph()->NewNode(mcgraph()->machine()->F64x2Abs(), inputs[0]);
case wasm::kExprF64x2Neg:
return graph()->NewNode(mcgraph()->machine()->F64x2Neg(), inputs[0]);
case wasm::kExprF64x2Sqrt:
return graph()->NewNode(mcgraph()->machine()->F64x2Sqrt(), inputs[0]);
case wasm::kExprF64x2Add:
return graph()->NewNode(mcgraph()->machine()->F64x2Add(), inputs[0],
inputs[1]);
case wasm::kExprF64x2Sub:
return graph()->NewNode(mcgraph()->machine()->F64x2Sub(), inputs[0],
inputs[1]);
case wasm::kExprF64x2Mul:
return graph()->NewNode(mcgraph()->machine()->F64x2Mul(), inputs[0],
inputs[1]);
case wasm::kExprF64x2Div:
return graph()->NewNode(mcgraph()->machine()->F64x2Div(), inputs[0],
inputs[1]);
case wasm::kExprF64x2Min:
return graph()->NewNode(mcgraph()->machine()->F64x2Min(), inputs[0],
inputs[1]);
case wasm::kExprF64x2Max:
return graph()->NewNode(mcgraph()->machine()->F64x2Max(), inputs[0],
inputs[1]);
case wasm::kExprF64x2Eq:
return graph()->NewNode(mcgraph()->machine()->F64x2Eq(), inputs[0],
inputs[1]);
case wasm::kExprF64x2Ne:
return graph()->NewNode(mcgraph()->machine()->F64x2Ne(), inputs[0],
inputs[1]);
case wasm::kExprF64x2Lt:
return graph()->NewNode(mcgraph()->machine()->F64x2Lt(), inputs[0],
inputs[1]);
case wasm::kExprF64x2Le:
return graph()->NewNode(mcgraph()->machine()->F64x2Le(), inputs[0],
inputs[1]);
case wasm::kExprF64x2Gt:
return graph()->NewNode(mcgraph()->machine()->F64x2Lt(), inputs[1],
inputs[0]);
case wasm::kExprF64x2Ge:
return graph()->NewNode(mcgraph()->machine()->F64x2Le(), inputs[1],
inputs[0]);
case wasm::kExprF64x2Qfma:
return graph()->NewNode(mcgraph()->machine()->F64x2Qfma(), inputs[0],
inputs[1], inputs[2]);
case wasm::kExprF64x2Qfms:
return graph()->NewNode(mcgraph()->machine()->F64x2Qfms(), inputs[0],
inputs[1], inputs[2]);
case wasm::kExprF64x2Pmin:
return graph()->NewNode(mcgraph()->machine()->F64x2Pmin(), inputs[0],
inputs[1]);
case wasm::kExprF64x2Pmax:
return graph()->NewNode(mcgraph()->machine()->F64x2Pmax(), inputs[0],
inputs[1]);
case wasm::kExprF64x2Ceil:
// Architecture support for F64x2Ceil and Float64RoundUp is the same.
if (!mcgraph()->machine()->Float64RoundUp().IsSupported())
return BuildF64x2Ceil(inputs[0]);
return graph()->NewNode(mcgraph()->machine()->F64x2Ceil(), inputs[0]);
case wasm::kExprF64x2Floor:
// Architecture support for F64x2Floor and Float64RoundDown is the same.
if (!mcgraph()->machine()->Float64RoundDown().IsSupported())
return BuildF64x2Floor(inputs[0]);
return graph()->NewNode(mcgraph()->machine()->F64x2Floor(), inputs[0]);
case wasm::kExprF64x2Trunc:
// Architecture support for F64x2Trunc and Float64RoundTruncate is the
// same.
if (!mcgraph()->machine()->Float64RoundTruncate().IsSupported())
return BuildF64x2Trunc(inputs[0]);
return graph()->NewNode(mcgraph()->machine()->F64x2Trunc(), inputs[0]);
case wasm::kExprF64x2NearestInt:
// Architecture support for F64x2NearestInt and Float64RoundTiesEven is
// the same.
if (!mcgraph()->machine()->Float64RoundTiesEven().IsSupported())
return BuildF64x2NearestInt(inputs[0]);
return graph()->NewNode(mcgraph()->machine()->F64x2NearestInt(),
inputs[0]);
case wasm::kExprF32x4Splat:
return graph()->NewNode(mcgraph()->machine()->F32x4Splat(), inputs[0]);
case wasm::kExprF32x4SConvertI32x4:
return graph()->NewNode(mcgraph()->machine()->F32x4SConvertI32x4(),
inputs[0]);
case wasm::kExprF32x4UConvertI32x4:
return graph()->NewNode(mcgraph()->machine()->F32x4UConvertI32x4(),
inputs[0]);
case wasm::kExprF32x4Abs:
return graph()->NewNode(mcgraph()->machine()->F32x4Abs(), inputs[0]);
case wasm::kExprF32x4Neg:
return graph()->NewNode(mcgraph()->machine()->F32x4Neg(), inputs[0]);
case wasm::kExprF32x4Sqrt:
return graph()->NewNode(mcgraph()->machine()->F32x4Sqrt(), inputs[0]);
case wasm::kExprF32x4RecipApprox:
return graph()->NewNode(mcgraph()->machine()->F32x4RecipApprox(),
inputs[0]);
case wasm::kExprF32x4RecipSqrtApprox:
return graph()->NewNode(mcgraph()->machine()->F32x4RecipSqrtApprox(),
inputs[0]);
case wasm::kExprF32x4Add:
return graph()->NewNode(mcgraph()->machine()->F32x4Add(), inputs[0],
inputs[1]);
case wasm::kExprF32x4AddHoriz:
return graph()->NewNode(mcgraph()->machine()->F32x4AddHoriz(), inputs[0],
inputs[1]);
case wasm::kExprF32x4Sub:
return graph()->NewNode(mcgraph()->machine()->F32x4Sub(), inputs[0],
inputs[1]);
case wasm::kExprF32x4Mul:
return graph()->NewNode(mcgraph()->machine()->F32x4Mul(), inputs[0],
inputs[1]);
case wasm::kExprF32x4Div:
return graph()->NewNode(mcgraph()->machine()->F32x4Div(), inputs[0],
inputs[1]);
case wasm::kExprF32x4Min:
return graph()->NewNode(mcgraph()->machine()->F32x4Min(), inputs[0],
inputs[1]);
case wasm::kExprF32x4Max:
return graph()->NewNode(mcgraph()->machine()->F32x4Max(), inputs[0],
inputs[1]);
case wasm::kExprF32x4Eq:
return graph()->NewNode(mcgraph()->machine()->F32x4Eq(), inputs[0],
inputs[1]);
case wasm::kExprF32x4Ne:
return graph()->NewNode(mcgraph()->machine()->F32x4Ne(), inputs[0],
inputs[1]);
case wasm::kExprF32x4Lt:
return graph()->NewNode(mcgraph()->machine()->F32x4Lt(), inputs[0],
inputs[1]);
case wasm::kExprF32x4Le:
return graph()->NewNode(mcgraph()->machine()->F32x4Le(), inputs[0],
inputs[1]);
case wasm::kExprF32x4Gt:
return graph()->NewNode(mcgraph()->machine()->F32x4Lt(), inputs[1],
inputs[0]);
case wasm::kExprF32x4Ge:
return graph()->NewNode(mcgraph()->machine()->F32x4Le(), inputs[1],
inputs[0]);
case wasm::kExprF32x4Qfma:
return graph()->NewNode(mcgraph()->machine()->F32x4Qfma(), inputs[0],
inputs[1], inputs[2]);
case wasm::kExprF32x4Qfms:
return graph()->NewNode(mcgraph()->machine()->F32x4Qfms(), inputs[0],
inputs[1], inputs[2]);
case wasm::kExprF32x4Pmin:
return graph()->NewNode(mcgraph()->machine()->F32x4Pmin(), inputs[0],
inputs[1]);
case wasm::kExprF32x4Pmax:
return graph()->NewNode(mcgraph()->machine()->F32x4Pmax(), inputs[0],
inputs[1]);
case wasm::kExprF32x4Ceil:
// Architecture support for F32x4Ceil and Float32RoundUp is the same.
if (!mcgraph()->machine()->Float32RoundUp().IsSupported())
return BuildF32x4Ceil(inputs[0]);
return graph()->NewNode(mcgraph()->machine()->F32x4Ceil(), inputs[0]);
case wasm::kExprF32x4Floor:
// Architecture support for F32x4Floor and Float32RoundDown is the same.
if (!mcgraph()->machine()->Float32RoundDown().IsSupported())
return BuildF32x4Floor(inputs[0]);
return graph()->NewNode(mcgraph()->machine()->F32x4Floor(), inputs[0]);
case wasm::kExprF32x4Trunc:
// Architecture support for F32x4Trunc and Float32RoundTruncate is the
// same.
if (!mcgraph()->machine()->Float32RoundTruncate().IsSupported())
return BuildF32x4Trunc(inputs[0]);
return graph()->NewNode(mcgraph()->machine()->F32x4Trunc(), inputs[0]);
case wasm::kExprF32x4NearestInt:
// Architecture support for F32x4NearestInt and Float32RoundTiesEven is
// the same.
if (!mcgraph()->machine()->Float32RoundTiesEven().IsSupported())
return BuildF32x4NearestInt(inputs[0]);
return graph()->NewNode(mcgraph()->machine()->F32x4NearestInt(),
inputs[0]);
case wasm::kExprI64x2Splat:
return graph()->NewNode(mcgraph()->machine()->I64x2Splat(), inputs[0]);
case wasm::kExprI64x2Neg:
return graph()->NewNode(mcgraph()->machine()->I64x2Neg(), inputs[0]);
case wasm::kExprI64x2SConvertI32x4Low:
return graph()->NewNode(mcgraph()->machine()->I64x2SConvertI32x4Low(),
inputs[0]);
case wasm::kExprI64x2SConvertI32x4High:
return graph()->NewNode(mcgraph()->machine()->I64x2SConvertI32x4High(),
inputs[0]);
case wasm::kExprI64x2UConvertI32x4Low:
return graph()->NewNode(mcgraph()->machine()->I64x2UConvertI32x4Low(),
inputs[0]);
case wasm::kExprI64x2UConvertI32x4High:
return graph()->NewNode(mcgraph()->machine()->I64x2UConvertI32x4High(),
inputs[0]);
case wasm::kExprI64x2BitMask:
return graph()->NewNode(mcgraph()->machine()->I64x2BitMask(), inputs[0]);
case wasm::kExprI64x2Shl:
return graph()->NewNode(mcgraph()->machine()->I64x2Shl(), inputs[0],
inputs[1]);
case wasm::kExprI64x2ShrS:
return graph()->NewNode(mcgraph()->machine()->I64x2ShrS(), inputs[0],
inputs[1]);
case wasm::kExprI64x2Add:
return graph()->NewNode(mcgraph()->machine()->I64x2Add(), inputs[0],
inputs[1]);
case wasm::kExprI64x2Sub:
return graph()->NewNode(mcgraph()->machine()->I64x2Sub(), inputs[0],
inputs[1]);
case wasm::kExprI64x2Mul:
return graph()->NewNode(mcgraph()->machine()->I64x2Mul(), inputs[0],
inputs[1]);
case wasm::kExprI64x2Eq:
return graph()->NewNode(mcgraph()->machine()->I64x2Eq(), inputs[0],
inputs[1]);
case wasm::kExprI64x2ShrU:
return graph()->NewNode(mcgraph()->machine()->I64x2ShrU(), inputs[0],
inputs[1]);
case wasm::kExprI64x2ExtMulLowI32x4S:
return graph()->NewNode(mcgraph()->machine()->I64x2ExtMulLowI32x4S(),
inputs[0], inputs[1]);
case wasm::kExprI64x2ExtMulHighI32x4S:
return graph()->NewNode(mcgraph()->machine()->I64x2ExtMulHighI32x4S(),
inputs[0], inputs[1]);
case wasm::kExprI64x2ExtMulLowI32x4U:
return graph()->NewNode(mcgraph()->machine()->I64x2ExtMulLowI32x4U(),
inputs[0], inputs[1]);
case wasm::kExprI64x2ExtMulHighI32x4U:
return graph()->NewNode(mcgraph()->machine()->I64x2ExtMulHighI32x4U(),
inputs[0], inputs[1]);
case wasm::kExprI64x2SignSelect:
return graph()->NewNode(mcgraph()->machine()->I64x2SignSelect(),
inputs[0], inputs[1], inputs[2]);
case wasm::kExprI32x4Splat:
return graph()->NewNode(mcgraph()->machine()->I32x4Splat(), inputs[0]);
case wasm::kExprI32x4SConvertF32x4:
return graph()->NewNode(mcgraph()->machine()->I32x4SConvertF32x4(),
inputs[0]);
case wasm::kExprI32x4UConvertF32x4:
return graph()->NewNode(mcgraph()->machine()->I32x4UConvertF32x4(),
inputs[0]);
case wasm::kExprI32x4SConvertI16x8Low:
return graph()->NewNode(mcgraph()->machine()->I32x4SConvertI16x8Low(),
inputs[0]);
case wasm::kExprI32x4SConvertI16x8High:
return graph()->NewNode(mcgraph()->machine()->I32x4SConvertI16x8High(),
inputs[0]);
case wasm::kExprI32x4Neg:
return graph()->NewNode(mcgraph()->machine()->I32x4Neg(), inputs[0]);
case wasm::kExprI32x4Shl:
return graph()->NewNode(mcgraph()->machine()->I32x4Shl(), inputs[0],
inputs[1]);
case wasm::kExprI32x4ShrS:
return graph()->NewNode(mcgraph()->machine()->I32x4ShrS(), inputs[0],
inputs[1]);
case wasm::kExprI32x4Add:
return graph()->NewNode(mcgraph()->machine()->I32x4Add(), inputs[0],
inputs[1]);
case wasm::kExprI32x4AddHoriz:
return graph()->NewNode(mcgraph()->machine()->I32x4AddHoriz(), inputs[0],
inputs[1]);
case wasm::kExprI32x4Sub:
return graph()->NewNode(mcgraph()->machine()->I32x4Sub(), inputs[0],
inputs[1]);
case wasm::kExprI32x4Mul:
return graph()->NewNode(mcgraph()->machine()->I32x4Mul(), inputs[0],
inputs[1]);
case wasm::kExprI32x4MinS:
return graph()->NewNode(mcgraph()->machine()->I32x4MinS(), inputs[0],
inputs[1]);
case wasm::kExprI32x4MaxS:
return graph()->NewNode(mcgraph()->machine()->I32x4MaxS(), inputs[0],
inputs[1]);
case wasm::kExprI32x4Eq:
return graph()->NewNode(mcgraph()->machine()->I32x4Eq(), inputs[0],
inputs[1]);
case wasm::kExprI32x4Ne:
return graph()->NewNode(mcgraph()->machine()->I32x4Ne(), inputs[0],
inputs[1]);
case wasm::kExprI32x4LtS:
return graph()->NewNode(mcgraph()->machine()->I32x4GtS(), inputs[1],
inputs[0]);
case wasm::kExprI32x4LeS:
return graph()->NewNode(mcgraph()->machine()->I32x4GeS(), inputs[1],
inputs[0]);
case wasm::kExprI32x4GtS:
return graph()->NewNode(mcgraph()->machine()->I32x4GtS(), inputs[0],
inputs[1]);
case wasm::kExprI32x4GeS:
return graph()->NewNode(mcgraph()->machine()->I32x4GeS(), inputs[0],
inputs[1]);
case wasm::kExprI32x4UConvertI16x8Low:
return graph()->NewNode(mcgraph()->machine()->I32x4UConvertI16x8Low(),
inputs[0]);
case wasm::kExprI32x4UConvertI16x8High:
return graph()->NewNode(mcgraph()->machine()->I32x4UConvertI16x8High(),
inputs[0]);
case wasm::kExprI32x4ShrU:
return graph()->NewNode(mcgraph()->machine()->I32x4ShrU(), inputs[0],
inputs[1]);
case wasm::kExprI32x4MinU:
return graph()->NewNode(mcgraph()->machine()->I32x4MinU(), inputs[0],
inputs[1]);
case wasm::kExprI32x4MaxU:
return graph()->NewNode(mcgraph()->machine()->I32x4MaxU(), inputs[0],
inputs[1]);
case wasm::kExprI32x4LtU:
return graph()->NewNode(mcgraph()->machine()->I32x4GtU(), inputs[1],
inputs[0]);
case wasm::kExprI32x4LeU:
return graph()->NewNode(mcgraph()->machine()->I32x4GeU(), inputs[1],
inputs[0]);
case wasm::kExprI32x4GtU:
return graph()->NewNode(mcgraph()->machine()->I32x4GtU(), inputs[0],
inputs[1]);
case wasm::kExprI32x4GeU:
return graph()->NewNode(mcgraph()->machine()->I32x4GeU(), inputs[0],
inputs[1]);
case wasm::kExprI32x4Abs:
return graph()->NewNode(mcgraph()->machine()->I32x4Abs(), inputs[0]);
case wasm::kExprI32x4BitMask:
return graph()->NewNode(mcgraph()->machine()->I32x4BitMask(), inputs[0]);
case wasm::kExprI32x4DotI16x8S:
return graph()->NewNode(mcgraph()->machine()->I32x4DotI16x8S(), inputs[0],
inputs[1]);
case wasm::kExprI32x4ExtMulLowI16x8S:
return graph()->NewNode(mcgraph()->machine()->I32x4ExtMulLowI16x8S(),
inputs[0], inputs[1]);
case wasm::kExprI32x4ExtMulHighI16x8S:
return graph()->NewNode(mcgraph()->machine()->I32x4ExtMulHighI16x8S(),
inputs[0], inputs[1]);
case wasm::kExprI32x4ExtMulLowI16x8U:
return graph()->NewNode(mcgraph()->machine()->I32x4ExtMulLowI16x8U(),
inputs[0], inputs[1]);
case wasm::kExprI32x4ExtMulHighI16x8U:
return graph()->NewNode(mcgraph()->machine()->I32x4ExtMulHighI16x8U(),
inputs[0], inputs[1]);
case wasm::kExprI32x4SignSelect:
return graph()->NewNode(mcgraph()->machine()->I32x4SignSelect(),
inputs[0], inputs[1], inputs[2]);
case wasm::kExprI32x4ExtAddPairwiseI16x8S:
return graph()->NewNode(mcgraph()->machine()->I32x4ExtAddPairwiseI16x8S(),
inputs[0]);
case wasm::kExprI32x4ExtAddPairwiseI16x8U:
return graph()->NewNode(mcgraph()->machine()->I32x4ExtAddPairwiseI16x8U(),
inputs[0]);
case wasm::kExprI16x8Splat:
return graph()->NewNode(mcgraph()->machine()->I16x8Splat(), inputs[0]);
case wasm::kExprI16x8SConvertI8x16Low:
return graph()->NewNode(mcgraph()->machine()->I16x8SConvertI8x16Low(),
inputs[0]);
case wasm::kExprI16x8SConvertI8x16High:
return graph()->NewNode(mcgraph()->machine()->I16x8SConvertI8x16High(),
inputs[0]);
case wasm::kExprI16x8Shl:
return graph()->NewNode(mcgraph()->machine()->I16x8Shl(), inputs[0],
inputs[1]);
case wasm::kExprI16x8ShrS:
return graph()->NewNode(mcgraph()->machine()->I16x8ShrS(), inputs[0],
inputs[1]);
case wasm::kExprI16x8Neg:
return graph()->NewNode(mcgraph()->machine()->I16x8Neg(), inputs[0]);
case wasm::kExprI16x8SConvertI32x4:
return graph()->NewNode(mcgraph()->machine()->I16x8SConvertI32x4(),
inputs[0], inputs[1]);
case wasm::kExprI16x8Add:
return graph()->NewNode(mcgraph()->machine()->I16x8Add(), inputs[0],
inputs[1]);
case wasm::kExprI16x8AddSatS:
return graph()->NewNode(mcgraph()->machine()->I16x8AddSatS(), inputs[0],
inputs[1]);
case wasm::kExprI16x8AddHoriz:
return graph()->NewNode(mcgraph()->machine()->I16x8AddHoriz(), inputs[0],
inputs[1]);
case wasm::kExprI16x8Sub:
return graph()->NewNode(mcgraph()->machine()->I16x8Sub(), inputs[0],
inputs[1]);
case wasm::kExprI16x8SubSatS:
return graph()->NewNode(mcgraph()->machine()->I16x8SubSatS(), inputs[0],
inputs[1]);
case wasm::kExprI16x8Mul:
return graph()->NewNode(mcgraph()->machine()->I16x8Mul(), inputs[0],
inputs[1]);
case wasm::kExprI16x8MinS:
return graph()->NewNode(mcgraph()->machine()->I16x8MinS(), inputs[0],
inputs[1]);
case wasm::kExprI16x8MaxS:
return graph()->NewNode(mcgraph()->machine()->I16x8MaxS(), inputs[0],
inputs[1]);
case wasm::kExprI16x8Eq:
return graph()->NewNode(mcgraph()->machine()->I16x8Eq(), inputs[0],
inputs[1]);
case wasm::kExprI16x8Ne:
return graph()->NewNode(mcgraph()->machine()->I16x8Ne(), inputs[0],
inputs[1]);
case wasm::kExprI16x8LtS:
return graph()->NewNode(mcgraph()->machine()->I16x8GtS(), inputs[1],
inputs[0]);
case wasm::kExprI16x8LeS:
return graph()->NewNode(mcgraph()->machine()->I16x8GeS(), inputs[1],
inputs[0]);
case wasm::kExprI16x8GtS:
return graph()->NewNode(mcgraph()->machine()->I16x8GtS(), inputs[0],
inputs[1]);
case wasm::kExprI16x8GeS:
return graph()->NewNode(mcgraph()->machine()->I16x8GeS(), inputs[0],
inputs[1]);
case wasm::kExprI16x8UConvertI8x16Low:
return graph()->NewNode(mcgraph()->machine()->I16x8UConvertI8x16Low(),
inputs[0]);
case wasm::kExprI16x8UConvertI8x16High:
return graph()->NewNode(mcgraph()->machine()->I16x8UConvertI8x16High(),
inputs[0]);
case wasm::kExprI16x8UConvertI32x4:
return graph()->NewNode(mcgraph()->machine()->I16x8UConvertI32x4(),
inputs[0], inputs[1]);
case wasm::kExprI16x8ShrU:
return graph()->NewNode(mcgraph()->machine()->I16x8ShrU(), inputs[0],
inputs[1]);
case wasm::kExprI16x8AddSatU:
return graph()->NewNode(mcgraph()->machine()->I16x8AddSatU(), inputs[0],
inputs[1]);
case wasm::kExprI16x8SubSatU:
return graph()->NewNode(mcgraph()->machine()->I16x8SubSatU(), inputs[0],
inputs[1]);
case wasm::kExprI16x8MinU:
return graph()->NewNode(mcgraph()->machine()->I16x8MinU(), inputs[0],
inputs[1]);
case wasm::kExprI16x8MaxU:
return graph()->NewNode(mcgraph()->machine()->I16x8MaxU(), inputs[0],
inputs[1]);
case wasm::kExprI16x8LtU:
return graph()->NewNode(mcgraph()->machine()->I16x8GtU(), inputs[1],
inputs[0]);
case wasm::kExprI16x8LeU:
return graph()->NewNode(mcgraph()->machine()->I16x8GeU(), inputs[1],
inputs[0]);
case wasm::kExprI16x8GtU:
return graph()->NewNode(mcgraph()->machine()->I16x8GtU(), inputs[0],
inputs[1]);
case wasm::kExprI16x8GeU:
return graph()->NewNode(mcgraph()->machine()->I16x8GeU(), inputs[0],
inputs[1]);
case wasm::kExprI16x8RoundingAverageU:
return graph()->NewNode(mcgraph()->machine()->I16x8RoundingAverageU(),
inputs[0], inputs[1]);
case wasm::kExprI16x8Q15MulRSatS:
return graph()->NewNode(mcgraph()->machine()->I16x8Q15MulRSatS(),
inputs[0], inputs[1]);
case wasm::kExprI16x8Abs:
return graph()->NewNode(mcgraph()->machine()->I16x8Abs(), inputs[0]);
case wasm::kExprI16x8BitMask:
return graph()->NewNode(mcgraph()->machine()->I16x8BitMask(), inputs[0]);
case wasm::kExprI16x8ExtMulLowI8x16S:
return graph()->NewNode(mcgraph()->machine()->I16x8ExtMulLowI8x16S(),
inputs[0], inputs[1]);
case wasm::kExprI16x8ExtMulHighI8x16S:
return graph()->NewNode(mcgraph()->machine()->I16x8ExtMulHighI8x16S(),
inputs[0], inputs[1]);
case wasm::kExprI16x8ExtMulLowI8x16U:
return graph()->NewNode(mcgraph()->machine()->I16x8ExtMulLowI8x16U(),
inputs[0], inputs[1]);
case wasm::kExprI16x8ExtMulHighI8x16U:
return graph()->NewNode(mcgraph()->machine()->I16x8ExtMulHighI8x16U(),
inputs[0], inputs[1]);
case wasm::kExprI16x8SignSelect:
return graph()->NewNode(mcgraph()->machine()->I16x8SignSelect(),
inputs[0], inputs[1], inputs[2]);
case wasm::kExprI16x8ExtAddPairwiseI8x16S:
return graph()->NewNode(mcgraph()->machine()->I16x8ExtAddPairwiseI8x16S(),
inputs[0]);
case wasm::kExprI16x8ExtAddPairwiseI8x16U:
return graph()->NewNode(mcgraph()->machine()->I16x8ExtAddPairwiseI8x16U(),
inputs[0]);
case wasm::kExprI8x16Splat:
return graph()->NewNode(mcgraph()->machine()->I8x16Splat(), inputs[0]);
case wasm::kExprI8x16Neg:
return graph()->NewNode(mcgraph()->machine()->I8x16Neg(), inputs[0]);
case wasm::kExprI8x16Shl:
return graph()->NewNode(mcgraph()->machine()->I8x16Shl(), inputs[0],
inputs[1]);
case wasm::kExprI8x16ShrS:
return graph()->NewNode(mcgraph()->machine()->I8x16ShrS(), inputs[0],
inputs[1]);
case wasm::kExprI8x16SConvertI16x8:
return graph()->NewNode(mcgraph()->machine()->I8x16SConvertI16x8(),
inputs[0], inputs[1]);
case wasm::kExprI8x16Add:
return graph()->NewNode(mcgraph()->machine()->I8x16Add(), inputs[0],
inputs[1]);
case wasm::kExprI8x16AddSatS:
return graph()->NewNode(mcgraph()->machine()->I8x16AddSatS(), inputs[0],
inputs[1]);
case wasm::kExprI8x16Sub:
return graph()->NewNode(mcgraph()->machine()->I8x16Sub(), inputs[0],
inputs[1]);
case wasm::kExprI8x16SubSatS:
return graph()->NewNode(mcgraph()->machine()->I8x16SubSatS(), inputs[0],
inputs[1]);
case wasm::kExprI8x16Mul:
return graph()->NewNode(mcgraph()->machine()->I8x16Mul(), inputs[0],
inputs[1]);
case wasm::kExprI8x16MinS:
return graph()->NewNode(mcgraph()->machine()->I8x16MinS(), inputs[0],
inputs[1]);
case wasm::kExprI8x16MaxS:
return graph()->NewNode(mcgraph()->machine()->I8x16MaxS(), inputs[0],
inputs[1]);
case wasm::kExprI8x16Eq:
return graph()->NewNode(mcgraph()->machine()->I8x16Eq(), inputs[0],
inputs[1]);
case wasm::kExprI8x16Ne:
return graph()->NewNode(mcgraph()->machine()->I8x16Ne(), inputs[0],
inputs[1]);
case wasm::kExprI8x16LtS:
return graph()->NewNode(mcgraph()->machine()->I8x16GtS(), inputs[1],
inputs[0]);
case wasm::kExprI8x16LeS:
return graph()->NewNode(mcgraph()->machine()->I8x16GeS(), inputs[1],
inputs[0]);
case wasm::kExprI8x16GtS:
return graph()->NewNode(mcgraph()->machine()->I8x16GtS(), inputs[0],
inputs[1]);
case wasm::kExprI8x16GeS:
return graph()->NewNode(mcgraph()->machine()->I8x16GeS(), inputs[0],
inputs[1]);
case wasm::kExprI8x16ShrU:
return graph()->NewNode(mcgraph()->machine()->I8x16ShrU(), inputs[0],
inputs[1]);
case wasm::kExprI8x16UConvertI16x8:
return graph()->NewNode(mcgraph()->machine()->I8x16UConvertI16x8(),
inputs[0], inputs[1]);
case wasm::kExprI8x16AddSatU:
return graph()->NewNode(mcgraph()->machine()->I8x16AddSatU(), inputs[0],
inputs[1]);
case wasm::kExprI8x16SubSatU:
return graph()->NewNode(mcgraph()->machine()->I8x16SubSatU(), inputs[0],
inputs[1]);
case wasm::kExprI8x16MinU:
return graph()->NewNode(mcgraph()->machine()->I8x16MinU(), inputs[0],
inputs[1]);
case wasm::kExprI8x16MaxU:
return graph()->NewNode(mcgraph()->machine()->I8x16MaxU(), inputs[0],
inputs[1]);
case wasm::kExprI8x16LtU:
return graph()->NewNode(mcgraph()->machine()->I8x16GtU(), inputs[1],
inputs[0]);
case wasm::kExprI8x16LeU:
return graph()->NewNode(mcgraph()->machine()->I8x16GeU(), inputs[1],
inputs[0]);
case wasm::kExprI8x16GtU:
return graph()->NewNode(mcgraph()->machine()->I8x16GtU(), inputs[0],
inputs[1]);
case wasm::kExprI8x16GeU:
return graph()->NewNode(mcgraph()->machine()->I8x16GeU(), inputs[0],
inputs[1]);
case wasm::kExprI8x16RoundingAverageU:
return graph()->NewNode(mcgraph()->machine()->I8x16RoundingAverageU(),
inputs[0], inputs[1]);
case wasm::kExprI8x16Popcnt:
return graph()->NewNode(mcgraph()->machine()->I8x16Popcnt(), inputs[0]);
case wasm::kExprI8x16Abs:
return graph()->NewNode(mcgraph()->machine()->I8x16Abs(), inputs[0]);
case wasm::kExprI8x16BitMask:
return graph()->NewNode(mcgraph()->machine()->I8x16BitMask(), inputs[0]);
case wasm::kExprI8x16SignSelect:
return graph()->NewNode(mcgraph()->machine()->I8x16SignSelect(),
inputs[0], inputs[1], inputs[2]);
case wasm::kExprS128And:
return graph()->NewNode(mcgraph()->machine()->S128And(), inputs[0],
inputs[1]);
case wasm::kExprS128Or:
return graph()->NewNode(mcgraph()->machine()->S128Or(), inputs[0],
inputs[1]);
case wasm::kExprS128Xor:
return graph()->NewNode(mcgraph()->machine()->S128Xor(), inputs[0],
inputs[1]);
case wasm::kExprS128Not:
return graph()->NewNode(mcgraph()->machine()->S128Not(), inputs[0]);
case wasm::kExprS128Select:
return graph()->NewNode(mcgraph()->machine()->S128Select(), inputs[2],
inputs[0], inputs[1]);
case wasm::kExprS128AndNot:
return graph()->NewNode(mcgraph()->machine()->S128AndNot(), inputs[0],
inputs[1]);
case wasm::kExprV32x4AnyTrue:
return graph()->NewNode(mcgraph()->machine()->V32x4AnyTrue(), inputs[0]);
case wasm::kExprV32x4AllTrue:
return graph()->NewNode(mcgraph()->machine()->V32x4AllTrue(), inputs[0]);
case wasm::kExprV16x8AnyTrue:
return graph()->NewNode(mcgraph()->machine()->V16x8AnyTrue(), inputs[0]);
case wasm::kExprV16x8AllTrue:
return graph()->NewNode(mcgraph()->machine()->V16x8AllTrue(), inputs[0]);
case wasm::kExprV8x16AnyTrue:
return graph()->NewNode(mcgraph()->machine()->V8x16AnyTrue(), inputs[0]);
case wasm::kExprV8x16AllTrue:
return graph()->NewNode(mcgraph()->machine()->V8x16AllTrue(), inputs[0]);
case wasm::kExprI8x16Swizzle:
return graph()->NewNode(mcgraph()->machine()->I8x16Swizzle(), inputs[0],
inputs[1]);
default:
FATAL_UNSUPPORTED_OPCODE(opcode);
}
}
Node* WasmGraphBuilder::SimdLaneOp(wasm::WasmOpcode opcode, uint8_t lane,
Node* const* inputs) {
has_simd_ = true;
switch (opcode) {
case wasm::kExprF64x2ExtractLane:
return graph()->NewNode(mcgraph()->machine()->F64x2ExtractLane(lane),
inputs[0]);
case wasm::kExprF64x2ReplaceLane:
return graph()->NewNode(mcgraph()->machine()->F64x2ReplaceLane(lane),
inputs[0], inputs[1]);
case wasm::kExprF32x4ExtractLane:
return graph()->NewNode(mcgraph()->machine()->F32x4ExtractLane(lane),
inputs[0]);
case wasm::kExprF32x4ReplaceLane:
return graph()->NewNode(mcgraph()->machine()->F32x4ReplaceLane(lane),
inputs[0], inputs[1]);
case wasm::kExprI64x2ExtractLane:
return graph()->NewNode(mcgraph()->machine()->I64x2ExtractLane(lane),
inputs[0]);
case wasm::kExprI64x2ReplaceLane:
return graph()->NewNode(mcgraph()->machine()->I64x2ReplaceLane(lane),
inputs[0], inputs[1]);
case wasm::kExprI32x4ExtractLane:
return graph()->NewNode(mcgraph()->machine()->I32x4ExtractLane(lane),
inputs[0]);
case wasm::kExprI32x4ReplaceLane:
return graph()->NewNode(mcgraph()->machine()->I32x4ReplaceLane(lane),
inputs[0], inputs[1]);
case wasm::kExprI16x8ExtractLaneS:
return graph()->NewNode(mcgraph()->machine()->I16x8ExtractLaneS(lane),
inputs[0]);
case wasm::kExprI16x8ExtractLaneU:
return graph()->NewNode(mcgraph()->machine()->I16x8ExtractLaneU(lane),
inputs[0]);
case wasm::kExprI16x8ReplaceLane:
return graph()->NewNode(mcgraph()->machine()->I16x8ReplaceLane(lane),
inputs[0], inputs[1]);
case wasm::kExprI8x16ExtractLaneS:
return graph()->NewNode(mcgraph()->machine()->I8x16ExtractLaneS(lane),
inputs[0]);
case wasm::kExprI8x16ExtractLaneU:
return graph()->NewNode(mcgraph()->machine()->I8x16ExtractLaneU(lane),
inputs[0]);
case wasm::kExprI8x16ReplaceLane:
return graph()->NewNode(mcgraph()->machine()->I8x16ReplaceLane(lane),
inputs[0], inputs[1]);
default:
FATAL_UNSUPPORTED_OPCODE(opcode);
}
}
Node* WasmGraphBuilder::Simd8x16ShuffleOp(const uint8_t shuffle[16],
Node* const* inputs) {
has_simd_ = true;
return graph()->NewNode(mcgraph()->machine()->I8x16Shuffle(shuffle),
inputs[0], inputs[1]);
}
Node* WasmGraphBuilder::AtomicOp(wasm::WasmOpcode opcode, Node* const* inputs,
uint32_t alignment, uint64_t offset,
wasm::WasmCodePosition position) {
struct AtomicOpInfo {
enum Type : int8_t {
kNoInput = 0,
kOneInput = 1,
kTwoInputs = 2,
kSpecial
};
using OperatorByType =
const Operator* (MachineOperatorBuilder::*)(MachineType);
using OperatorByRep =
const Operator* (MachineOperatorBuilder::*)(MachineRepresentation);
const Type type;
const MachineType machine_type;
const OperatorByType operator_by_type = nullptr;
const OperatorByRep operator_by_rep = nullptr;
constexpr AtomicOpInfo(Type t, MachineType m, OperatorByType o)
: type(t), machine_type(m), operator_by_type(o) {}
constexpr AtomicOpInfo(Type t, MachineType m, OperatorByRep o)
: type(t), machine_type(m), operator_by_rep(o) {}
// Constexpr, hence just a table lookup in most compilers.
static constexpr AtomicOpInfo Get(wasm::WasmOpcode opcode) {
switch (opcode) {
#define CASE(Name, Type, MachType, Op) \
case wasm::kExpr##Name: \
return {Type, MachineType::MachType(), &MachineOperatorBuilder::Op};
// Binops.
CASE(I32AtomicAdd, kOneInput, Uint32, Word32AtomicAdd)
CASE(I64AtomicAdd, kOneInput, Uint64, Word64AtomicAdd)
CASE(I32AtomicAdd8U, kOneInput, Uint8, Word32AtomicAdd)
CASE(I32AtomicAdd16U, kOneInput, Uint16, Word32AtomicAdd)
CASE(I64AtomicAdd8U, kOneInput, Uint8, Word64AtomicAdd)
CASE(I64AtomicAdd16U, kOneInput, Uint16, Word64AtomicAdd)
CASE(I64AtomicAdd32U, kOneInput, Uint32, Word64AtomicAdd)
CASE(I32AtomicSub, kOneInput, Uint32, Word32AtomicSub)
CASE(I64AtomicSub, kOneInput, Uint64, Word64AtomicSub)
CASE(I32AtomicSub8U, kOneInput, Uint8, Word32AtomicSub)
CASE(I32AtomicSub16U, kOneInput, Uint16, Word32AtomicSub)
CASE(I64AtomicSub8U, kOneInput, Uint8, Word64AtomicSub)
CASE(I64AtomicSub16U, kOneInput, Uint16, Word64AtomicSub)
CASE(I64AtomicSub32U, kOneInput, Uint32, Word64AtomicSub)
CASE(I32AtomicAnd, kOneInput, Uint32, Word32AtomicAnd)
CASE(I64AtomicAnd, kOneInput, Uint64, Word64AtomicAnd)
CASE(I32AtomicAnd8U, kOneInput, Uint8, Word32AtomicAnd)
CASE(I32AtomicAnd16U, kOneInput, Uint16, Word32AtomicAnd)
CASE(I64AtomicAnd8U, kOneInput, Uint8, Word64AtomicAnd)
CASE(I64AtomicAnd16U, kOneInput, Uint16, Word64AtomicAnd)
CASE(I64AtomicAnd32U, kOneInput, Uint32, Word64AtomicAnd)
CASE(I32AtomicOr, kOneInput, Uint32, Word32AtomicOr)
CASE(I64AtomicOr, kOneInput, Uint64, Word64AtomicOr)
CASE(I32AtomicOr8U, kOneInput, Uint8, Word32AtomicOr)
CASE(I32AtomicOr16U, kOneInput, Uint16, Word32AtomicOr)
CASE(I64AtomicOr8U, kOneInput, Uint8, Word64AtomicOr)
CASE(I64AtomicOr16U, kOneInput, Uint16, Word64AtomicOr)
CASE(I64AtomicOr32U, kOneInput, Uint32, Word64AtomicOr)
CASE(I32AtomicXor, kOneInput, Uint32, Word32AtomicXor)
CASE(I64AtomicXor, kOneInput, Uint64, Word64AtomicXor)
CASE(I32AtomicXor8U, kOneInput, Uint8, Word32AtomicXor)
CASE(I32AtomicXor16U, kOneInput, Uint16, Word32AtomicXor)
CASE(I64AtomicXor8U, kOneInput, Uint8, Word64AtomicXor)
CASE(I64AtomicXor16U, kOneInput, Uint16, Word64AtomicXor)
CASE(I64AtomicXor32U, kOneInput, Uint32, Word64AtomicXor)
CASE(I32AtomicExchange, kOneInput, Uint32, Word32AtomicExchange)
CASE(I64AtomicExchange, kOneInput, Uint64, Word64AtomicExchange)
CASE(I32AtomicExchange8U, kOneInput, Uint8, Word32AtomicExchange)
CASE(I32AtomicExchange16U, kOneInput, Uint16, Word32AtomicExchange)
CASE(I64AtomicExchange8U, kOneInput, Uint8, Word64AtomicExchange)
CASE(I64AtomicExchange16U, kOneInput, Uint16, Word64AtomicExchange)
CASE(I64AtomicExchange32U, kOneInput, Uint32, Word64AtomicExchange)
// Compare-exchange.
CASE(I32AtomicCompareExchange, kTwoInputs, Uint32,
Word32AtomicCompareExchange)
CASE(I64AtomicCompareExchange, kTwoInputs, Uint64,
Word64AtomicCompareExchange)
CASE(I32AtomicCompareExchange8U, kTwoInputs, Uint8,
Word32AtomicCompareExchange)
CASE(I32AtomicCompareExchange16U, kTwoInputs, Uint16,
Word32AtomicCompareExchange)
CASE(I64AtomicCompareExchange8U, kTwoInputs, Uint8,
Word64AtomicCompareExchange)
CASE(I64AtomicCompareExchange16U, kTwoInputs, Uint16,
Word64AtomicCompareExchange)
CASE(I64AtomicCompareExchange32U, kTwoInputs, Uint32,
Word64AtomicCompareExchange)
// Load.
CASE(I32AtomicLoad, kNoInput, Uint32, Word32AtomicLoad)
CASE(I64AtomicLoad, kNoInput, Uint64, Word64AtomicLoad)
CASE(I32AtomicLoad8U, kNoInput, Uint8, Word32AtomicLoad)
CASE(I32AtomicLoad16U, kNoInput, Uint16, Word32AtomicLoad)
CASE(I64AtomicLoad8U, kNoInput, Uint8, Word64AtomicLoad)
CASE(I64AtomicLoad16U, kNoInput, Uint16, Word64AtomicLoad)
CASE(I64AtomicLoad32U, kNoInput, Uint32, Word64AtomicLoad)
// Store.
CASE(I32AtomicStore, kOneInput, Uint32, Word32AtomicStore)
CASE(I64AtomicStore, kOneInput, Uint64, Word64AtomicStore)
CASE(I32AtomicStore8U, kOneInput, Uint8, Word32AtomicStore)
CASE(I32AtomicStore16U, kOneInput, Uint16, Word32AtomicStore)
CASE(I64AtomicStore8U, kOneInput, Uint8, Word64AtomicStore)
CASE(I64AtomicStore16U, kOneInput, Uint16, Word64AtomicStore)
CASE(I64AtomicStore32U, kOneInput, Uint32, Word64AtomicStore)
#undef CASE
case wasm::kExprAtomicNotify:
return {kSpecial, MachineType::Int32(), OperatorByType{nullptr}};
case wasm::kExprI32AtomicWait:
return {kSpecial, MachineType::Int32(), OperatorByType{nullptr}};
case wasm::kExprI64AtomicWait:
return {kSpecial, MachineType::Int64(), OperatorByType{nullptr}};
default:
#if V8_HAS_CXX14_CONSTEXPR
UNREACHABLE();
#else
// Return something for older GCC.
return {kSpecial, MachineType::Int64(), OperatorByType{nullptr}};
#endif
}
}
};
AtomicOpInfo info = AtomicOpInfo::Get(opcode);
Node* index = CheckBoundsAndAlignment(info.machine_type.MemSize(), inputs[0],
offset, position);
// {offset} is validated to be within uintptr_t range in {BoundsCheckMem}.
uintptr_t capped_offset = static_cast<uintptr_t>(offset);
if (info.type != AtomicOpInfo::kSpecial) {
const Operator* op =
info.operator_by_type
? (mcgraph()->machine()->*info.operator_by_type)(info.machine_type)
: (mcgraph()->machine()->*info.operator_by_rep)(
info.machine_type.representation());
Node* input_nodes[6] = {MemBuffer(capped_offset), index};
int num_actual_inputs = info.type;
std::copy_n(inputs + 1, num_actual_inputs, input_nodes + 2);
input_nodes[num_actual_inputs + 2] = effect();
input_nodes[num_actual_inputs + 3] = control();
return gasm_->AddNode(
graph()->NewNode(op, num_actual_inputs + 4, input_nodes));
}
// After we've bounds-checked, compute the effective offset.
Node* effective_offset =
gasm_->IntAdd(gasm_->UintPtrConstant(capped_offset), index);
switch (opcode) {
case wasm::kExprAtomicNotify: {
auto* call_descriptor =
GetBuiltinCallDescriptor<WasmAtomicNotifyDescriptor>(
this, StubCallMode::kCallWasmRuntimeStub);
Node* call_target = mcgraph()->RelocatableIntPtrConstant(
wasm::WasmCode::kWasmAtomicNotify, RelocInfo::WASM_STUB_CALL);
return gasm_->Call(call_descriptor, call_target, effective_offset,
inputs[1]);
}
case wasm::kExprI32AtomicWait: {
auto* call_descriptor = GetI32AtomicWaitCallDescriptor();
intptr_t target = mcgraph()->machine()->Is64()
? wasm::WasmCode::kWasmI32AtomicWait64
: wasm::WasmCode::kWasmI32AtomicWait32;
Node* call_target = mcgraph()->RelocatableIntPtrConstant(
target, RelocInfo::WASM_STUB_CALL);
return gasm_->Call(call_descriptor, call_target, effective_offset,
inputs[1], inputs[2]);
}
case wasm::kExprI64AtomicWait: {
auto* call_descriptor = GetI64AtomicWaitCallDescriptor();
intptr_t target = mcgraph()->machine()->Is64()
? wasm::WasmCode::kWasmI64AtomicWait64
: wasm::WasmCode::kWasmI64AtomicWait32;
Node* call_target = mcgraph()->RelocatableIntPtrConstant(
target, RelocInfo::WASM_STUB_CALL);
return gasm_->Call(call_descriptor, call_target, effective_offset,
inputs[1], inputs[2]);
}
default:
FATAL_UNSUPPORTED_OPCODE(opcode);
}
}
Node* WasmGraphBuilder::AtomicFence() {
return SetEffect(graph()->NewNode(mcgraph()->machine()->MemBarrier(),
effect(), control()));
}
Node* WasmGraphBuilder::MemoryInit(uint32_t data_segment_index, Node* dst,
Node* src, Node* size,
wasm::WasmCodePosition position) {
// The data segment index must be in bounds since it is required by
// validation.
DCHECK_LT(data_segment_index, env_->module->num_declared_data_segments);
Node* function = graph()->NewNode(mcgraph()->common()->ExternalConstant(
ExternalReference::wasm_memory_init()));
Node* stack_slot = StoreArgsInStackSlot(
{{MachineType::PointerRepresentation(), instance_node_.get()},
{MachineRepresentation::kWord32, dst},
{MachineRepresentation::kWord32, src},
{MachineRepresentation::kWord32,
gasm_->Uint32Constant(data_segment_index)},
{MachineRepresentation::kWord32, size}});
MachineType sig_types[] = {MachineType::Int32(), MachineType::Pointer()};
MachineSignature sig(1, 1, sig_types);
Node* call = SetEffect(BuildCCall(&sig, function, stack_slot));
return TrapIfFalse(wasm::kTrapMemOutOfBounds, call, position);
}
Node* WasmGraphBuilder::DataDrop(uint32_t data_segment_index,
wasm::WasmCodePosition position) {
DCHECK_LT(data_segment_index, env_->module->num_declared_data_segments);
Node* seg_size_array =
LOAD_INSTANCE_FIELD(DataSegmentSizes, MachineType::Pointer());
STATIC_ASSERT(wasm::kV8MaxWasmDataSegments <= kMaxUInt32 >> 2);
const Operator* store_op = mcgraph()->machine()->Store(
StoreRepresentation(MachineRepresentation::kWord32, kNoWriteBarrier));
return SetEffect(
graph()->NewNode(store_op, seg_size_array,
mcgraph()->IntPtrConstant(data_segment_index << 2),
mcgraph()->Int32Constant(0), effect(), control()));
}
Node* WasmGraphBuilder::StoreArgsInStackSlot(
std::initializer_list<std::pair<MachineRepresentation, Node*>> args) {
int slot_size = 0;
for (auto arg : args) {
slot_size += ElementSizeInBytes(arg.first);
}
DCHECK_LT(0, slot_size);
Node* stack_slot =
graph()->NewNode(mcgraph()->machine()->StackSlot(slot_size));
int offset = 0;
for (auto arg : args) {
MachineRepresentation type = arg.first;
Node* value = arg.second;
gasm_->Store(StoreRepresentation(type, kNoWriteBarrier), stack_slot,
mcgraph()->Int32Constant(offset), value);
offset += ElementSizeInBytes(type);
}
return stack_slot;
}
Node* WasmGraphBuilder::MemoryCopy(Node* dst, Node* src, Node* size,
wasm::WasmCodePosition position) {
Node* function = graph()->NewNode(mcgraph()->common()->ExternalConstant(
ExternalReference::wasm_memory_copy()));
Node* stack_slot = StoreArgsInStackSlot(
{{MachineType::PointerRepresentation(), instance_node_.get()},
{MachineRepresentation::kWord32, dst},
{MachineRepresentation::kWord32, src},
{MachineRepresentation::kWord32, size}});
MachineType sig_types[] = {MachineType::Int32(), MachineType::Pointer()};
MachineSignature sig(1, 1, sig_types);
Node* call = SetEffect(BuildCCall(&sig, function, stack_slot));
return TrapIfFalse(wasm::kTrapMemOutOfBounds, call, position);
}
Node* WasmGraphBuilder::MemoryFill(Node* dst, Node* value, Node* size,
wasm::WasmCodePosition position) {
Node* function = graph()->NewNode(mcgraph()->common()->ExternalConstant(
ExternalReference::wasm_memory_fill()));
Node* stack_slot = StoreArgsInStackSlot(
{{MachineType::PointerRepresentation(), instance_node_.get()},
{MachineRepresentation::kWord32, dst},
{MachineRepresentation::kWord32, value},
{MachineRepresentation::kWord32, size}});
MachineType sig_types[] = {MachineType::Int32(), MachineType::Pointer()};
MachineSignature sig(1, 1, sig_types);
Node* call = SetEffect(BuildCCall(&sig, function, stack_slot));
return TrapIfFalse(wasm::kTrapMemOutOfBounds, call, position);
}
Node* WasmGraphBuilder::TableInit(uint32_t table_index,
uint32_t elem_segment_index, Node* dst,
Node* src, Node* size,
wasm::WasmCodePosition position) {
auto call_descriptor = GetBuiltinCallDescriptor<WasmTableInitDescriptor>(
this, StubCallMode::kCallWasmRuntimeStub);
intptr_t target = wasm::WasmCode::kWasmTableInit;
Node* call_target =
mcgraph()->RelocatableIntPtrConstant(target, RelocInfo::WASM_STUB_CALL);
return gasm_->Call(
call_descriptor, call_target, dst, src, size,
graph()->NewNode(mcgraph()->common()->NumberConstant(table_index)),
graph()->NewNode(
mcgraph()->common()->NumberConstant(elem_segment_index)));
}
Node* WasmGraphBuilder::ElemDrop(uint32_t elem_segment_index,
wasm::WasmCodePosition position) {
// The elem segment index must be in bounds since it is required by
// validation.
DCHECK_LT(elem_segment_index, env_->module->elem_segments.size());
Node* dropped_elem_segments =
LOAD_INSTANCE_FIELD(DroppedElemSegments, MachineType::Pointer());
const Operator* store_op = mcgraph()->machine()->Store(
StoreRepresentation(MachineRepresentation::kWord8, kNoWriteBarrier));
return SetEffect(
graph()->NewNode(store_op, dropped_elem_segments,
mcgraph()->IntPtrConstant(elem_segment_index),
mcgraph()->Int32Constant(1), effect(), control()));
}
Node* WasmGraphBuilder::TableCopy(uint32_t table_dst_index,
uint32_t table_src_index, Node* dst,
Node* src, Node* size,
wasm::WasmCodePosition position) {
auto call_descriptor = GetBuiltinCallDescriptor<WasmTableCopyDescriptor>(
this, StubCallMode::kCallWasmRuntimeStub);
intptr_t target = wasm::WasmCode::kWasmTableCopy;
Node* call_target =
mcgraph()->RelocatableIntPtrConstant(target, RelocInfo::WASM_STUB_CALL);
return gasm_->Call(
call_descriptor, call_target, dst, src, size,
graph()->NewNode(mcgraph()->common()->NumberConstant(table_dst_index)),
graph()->NewNode(mcgraph()->common()->NumberConstant(table_src_index)));
}
Node* WasmGraphBuilder::TableGrow(uint32_t table_index, Node* value,
Node* delta) {
Node* args[] = {
graph()->NewNode(mcgraph()->common()->NumberConstant(table_index)), value,
BuildConvertUint32ToSmiWithSaturation(delta, FLAG_wasm_max_table_size)};
Node* result =
BuildCallToRuntime(Runtime::kWasmTableGrow, args, arraysize(args));
return BuildChangeSmiToInt32(result);
}
Node* WasmGraphBuilder::TableSize(uint32_t table_index) {
Node* tables = LOAD_INSTANCE_FIELD(Tables, MachineType::TaggedPointer());
Node* table = LOAD_FIXED_ARRAY_SLOT_ANY(tables, table_index);
int length_field_size = WasmTableObject::kCurrentLengthOffsetEnd -
WasmTableObject::kCurrentLengthOffset + 1;
Node* length_smi = gasm_->Load(
assert_size(length_field_size, MachineType::TaggedSigned()), table,
wasm::ObjectAccess::ToTagged(WasmTableObject::kCurrentLengthOffset));
return BuildChangeSmiToInt32(length_smi);
}
Node* WasmGraphBuilder::TableFill(uint32_t table_index, Node* start,
Node* value, Node* count) {
Node* args[] = {
graph()->NewNode(mcgraph()->common()->NumberConstant(table_index)),
BuildConvertUint32ToSmiWithSaturation(start, FLAG_wasm_max_table_size),
value,
BuildConvertUint32ToSmiWithSaturation(count, FLAG_wasm_max_table_size)};
return BuildCallToRuntime(Runtime::kWasmTableFill, args, arraysize(args));
}
namespace {
MachineType FieldType(const wasm::StructType* type, uint32_t field_index,
bool is_signed) {
return MachineType::TypeForRepresentation(
type->field(field_index).machine_representation(), is_signed);
}
Node* FieldOffset(MachineGraph* graph, const wasm::StructType* type,
uint32_t field_index) {
int offset = WasmStruct::kHeaderSize + type->field_offset(field_index) -
kHeapObjectTag;
return graph->IntPtrConstant(offset);
}
// It's guaranteed that struct/array fields are aligned to min(field_size,
// kTaggedSize), with the latter being 4 or 8 depending on platform and
// pointer compression. So on our most common configurations, 8-byte types
// must use unaligned loads/stores.
Node* LoadWithTaggedAlignment(WasmGraphAssembler* gasm, MachineType type,
Node* base, Node* offset) {
if (ElementSizeInBytes(type.representation()) > kTaggedSize) {
return gasm->LoadUnaligned(type, base, offset);
} else {
return gasm->Load(type, base, offset);
}
}
// Same alignment considerations as above.
Node* StoreWithTaggedAlignment(WasmGraphAssembler* gasm, Node* base,
Node* offset, Node* value,
wasm::ValueType type) {
MachineRepresentation rep = type.machine_representation();
if (ElementSizeInBytes(rep) > kTaggedSize) {
return gasm->StoreUnaligned(rep, base, offset, value);
} else {
WriteBarrierKind write_barrier =
type.is_reference_type() ? kPointerWriteBarrier : kNoWriteBarrier;
StoreRepresentation store_rep(rep, write_barrier);
return gasm->Store(store_rep, base, offset, value);
}
}
// Set a field of a struct, without checking if the struct is null.
// Helper method for StructNewWithRtt and StructSet.
Node* StoreStructFieldUnchecked(MachineGraph* graph, WasmGraphAssembler* gasm,
Node* struct_object,
const wasm::StructType* type,
uint32_t field_index, Node* value) {
return StoreWithTaggedAlignment(gasm, struct_object,
FieldOffset(graph, type, field_index), value,
type->field(field_index));
}
Node* ArrayElementOffset(GraphAssembler* gasm, Node* index,
wasm::ValueType element_type) {
return gasm->Int32Add(
gasm->Int32Constant(WasmArray::kHeaderSize - kHeapObjectTag),
gasm->Int32Mul(index,
gasm->Int32Constant(element_type.element_size_bytes())));
}
Node* ArrayLength(GraphAssembler* gasm, Node* array) {
return gasm->Load(
MachineType::Uint32(), array,
gasm->Int32Constant(WasmArray::kLengthOffset - kHeapObjectTag));
}
} // namespace
Node* WasmGraphBuilder::StructNewWithRtt(uint32_t struct_index,
const wasm::StructType* type,
Node* rtt, Vector<Node*> fields) {
Node* s = CALL_BUILTIN(
WasmAllocateStructWithRtt, rtt,
LOAD_INSTANCE_FIELD(NativeContext, MachineType::TaggedPointer()));
for (uint32_t i = 0; i < type->field_count(); i++) {
StoreStructFieldUnchecked(mcgraph(), gasm_.get(), s, type, i, fields[i]);
}
return s;
}
Node* WasmGraphBuilder::ArrayNewWithRtt(uint32_t array_index,
const wasm::ArrayType* type,
Node* length, Node* initial_value,
Node* rtt) {
wasm::ValueType element_type = type->element_type();
Node* a = CALL_BUILTIN(
WasmAllocateArrayWithRtt, rtt, BuildChangeUint31ToSmi(length),
graph()->NewNode(mcgraph()->common()->NumberConstant(
element_type.element_size_bytes())),
LOAD_INSTANCE_FIELD(NativeContext, MachineType::TaggedPointer()));
auto loop = gasm_->MakeLoopLabel(MachineRepresentation::kWord32);
auto done = gasm_->MakeLabel();
Node* start_offset =
gasm_->Int32Constant(WasmArray::kHeaderSize - kHeapObjectTag);
Node* element_size = gasm_->Int32Constant(element_type.element_size_bytes());
Node* end_offset =
gasm_->Int32Add(start_offset, gasm_->Int32Mul(element_size, length));
// "Goto" requires the graph's end to have been set up.
// TODO(jkummerow): Figure out if there's a more elegant solution.
Graph* g = mcgraph()->graph();
if (!g->end()) {
g->SetEnd(g->NewNode(mcgraph()->common()->End(0)));
}
gasm_->Goto(&loop, start_offset);
gasm_->Bind(&loop);
{
Node* offset = loop.PhiAt(0);
Node* check = gasm_->Uint32LessThan(offset, end_offset);
gasm_->GotoIfNot(check, &done);
StoreWithTaggedAlignment(gasm_.get(), a, offset, initial_value,
type->element_type());
offset = gasm_->Int32Add(offset, element_size);
gasm_->Goto(&loop, offset);
}
gasm_->Bind(&done);
return a;
}
Node* WasmGraphBuilder::RttCanon(wasm::HeapType type) {
if (type.is_generic()) {
switch (type.representation()) {
case wasm::HeapType::kEq:
return LOAD_FULL_POINTER(
BuildLoadIsolateRoot(),
IsolateData::root_slot_offset(RootIndex::kWasmRttEqrefMap));
case wasm::HeapType::kExtern:
return LOAD_FULL_POINTER(
BuildLoadIsolateRoot(),
IsolateData::root_slot_offset(RootIndex::kWasmRttExternrefMap));
case wasm::HeapType::kFunc:
return LOAD_FULL_POINTER(
BuildLoadIsolateRoot(),
IsolateData::root_slot_offset(RootIndex::kWasmRttFuncrefMap));
case wasm::HeapType::kI31:
return LOAD_FULL_POINTER(
BuildLoadIsolateRoot(),
IsolateData::root_slot_offset(RootIndex::kWasmRttI31refMap));
default:
UNREACHABLE();
}
}
Node* maps_list =
LOAD_INSTANCE_FIELD(ManagedObjectMaps, MachineType::TaggedPointer());
return LOAD_FIXED_ARRAY_SLOT_PTR(maps_list, type.ref_index());
}
Node* WasmGraphBuilder::RttSub(wasm::HeapType type, Node* parent_rtt) {
return CALL_BUILTIN(
WasmAllocateRtt,
graph()->NewNode(
mcgraph()->common()->NumberConstant(type.representation())),
parent_rtt,
LOAD_INSTANCE_FIELD(NativeContext, MachineType::TaggedPointer()));
}
Node* IsI31(GraphAssembler* gasm, Node* object) {
if (COMPRESS_POINTERS_BOOL) {
return gasm->Word32Equal(
gasm->Word32And(object, gasm->Int32Constant(kSmiTagMask)),
gasm->Int32Constant(kSmiTag));
} else {
return gasm->WordEqual(
gasm->WordAnd(object, gasm->IntPtrConstant(kSmiTagMask)),
gasm->IntPtrConstant(kSmiTag));
}
}
void AssertFalse(MachineGraph* mcgraph, GraphAssembler* gasm, Node* condition) {
#if DEBUG
if (FLAG_debug_code) {
auto ok = gasm->MakeLabel();
gasm->GotoIfNot(condition, &ok);
EnsureEnd(mcgraph);
gasm->Unreachable();
gasm->Bind(&ok);
}
#endif
}
Node* WasmGraphBuilder::RefTest(Node* object, Node* rtt,
CheckForNull null_check, CheckForI31 i31_check,
RttIsI31 rtt_is_i31) {
auto done = gasm_->MakeLabel(MachineRepresentation::kWord32);
bool need_done_label = false;
if (i31_check == kWithI31Check) {
if (rtt_is_i31 == kRttIsI31) {
return IsI31(gasm_.get(), object);
}
gasm_->GotoIf(IsI31(gasm_.get(), object), &done, gasm_->Int32Constant(0));
need_done_label = true;
} else {
AssertFalse(mcgraph(), gasm_.get(), IsI31(gasm_.get(), object));
}
if (null_check == kWithNullCheck) {
gasm_->GotoIf(gasm_->WordEqual(object, RefNull()), &done,
gasm_->Int32Constant(0));
need_done_label = true;
}
Node* map = gasm_->Load(MachineType::TaggedPointer(), object,
HeapObject::kMapOffset - kHeapObjectTag);
// TODO(7748): Add a fast path for map == rtt.
Node* subtype_check = BuildChangeSmiToInt32(CALL_BUILTIN(
WasmIsRttSubtype, map, rtt,
LOAD_INSTANCE_FIELD(NativeContext, MachineType::TaggedPointer())));
if (need_done_label) {
gasm_->Goto(&done, subtype_check);
gasm_->Bind(&done);
subtype_check = done.PhiAt(0);
}
return subtype_check;
}
Node* WasmGraphBuilder::RefCast(Node* object, Node* rtt,
CheckForNull null_check, CheckForI31 i31_check,
RttIsI31 rtt_is_i31,
wasm::WasmCodePosition position) {
if (i31_check == kWithI31Check) {
if (rtt_is_i31 == kRttIsI31) {
TrapIfFalse(wasm::kTrapIllegalCast, IsI31(gasm_.get(), object), position);
return object;
} else {
TrapIfTrue(wasm::kTrapIllegalCast, IsI31(gasm_.get(), object), position);
}
} else {
AssertFalse(mcgraph(), gasm_.get(), IsI31(gasm_.get(), object));
}
if (null_check == kWithNullCheck) {
TrapIfTrue(wasm::kTrapIllegalCast, gasm_->WordEqual(object, RefNull()),
position);
}
Node* map = gasm_->Load(MachineType::TaggedPointer(), object,
HeapObject::kMapOffset - kHeapObjectTag);
// TODO(7748): Add a fast path for map == rtt.
Node* check_result = BuildChangeSmiToInt32(CALL_BUILTIN(
WasmIsRttSubtype, map, rtt,
LOAD_INSTANCE_FIELD(NativeContext, MachineType::TaggedPointer())));
TrapIfFalse(wasm::kTrapIllegalCast, check_result, position);
return object;
}
Node* WasmGraphBuilder::BrOnCast(Node* object, Node* rtt,
CheckForNull null_check, CheckForI31 i31_check,
RttIsI31 rtt_is_i31, Node** match_control,
Node** match_effect, Node** no_match_control,
Node** no_match_effect) {
// We have up to 3 control nodes to merge; the EffectPhi needs an additional
// input.
base::SmallVector<Node*, 3> merge_controls;
base::SmallVector<Node*, 4> merge_effects;
Node* is_i31 = IsI31(gasm_.get(), object);
if (i31_check == kWithI31Check) {
if (rtt_is_i31 == kRttIsI31) {
BranchExpectFalse(is_i31, match_control, no_match_control);
return nullptr;
} else {
Node* i31_branch = graph()->NewNode(
mcgraph()->common()->Branch(BranchHint::kFalse), is_i31, control());
SetControl(graph()->NewNode(mcgraph()->common()->IfFalse(), i31_branch));
merge_controls.emplace_back(
graph()->NewNode(mcgraph()->common()->IfTrue(), i31_branch));
merge_effects.emplace_back(effect());
}
} else {
AssertFalse(mcgraph(), gasm_.get(), is_i31);
}
if (null_check == kWithNullCheck) {
Node* null_branch =
graph()->NewNode(mcgraph()->common()->Branch(BranchHint::kFalse),
gasm_->WordEqual(object, RefNull()), control());
SetControl(graph()->NewNode(mcgraph()->common()->IfFalse(), null_branch));
merge_controls.emplace_back(
graph()->NewNode(mcgraph()->common()->IfTrue(), null_branch));
merge_effects.emplace_back(effect());
}
// At this point, {object} is neither null nor an i31ref/Smi.
Node* map = gasm_->Load(MachineType::TaggedPointer(), object,
HeapObject::kMapOffset - kHeapObjectTag);
// TODO(7748): Add a fast path for map == rtt.
Node* subtype_check = BuildChangeSmiToInt32(CALL_BUILTIN(
WasmIsRttSubtype, map, rtt,
LOAD_INSTANCE_FIELD(NativeContext, MachineType::TaggedPointer())));
Node* cast_branch =
graph()->NewNode(mcgraph()->common()->Branch(BranchHint::kFalse),
subtype_check, control());
*match_control = graph()->NewNode(mcgraph()->common()->IfTrue(), cast_branch);
*match_effect = effect();
Node* not_subtype =
graph()->NewNode(mcgraph()->common()->IfFalse(), cast_branch);
// Wire up the "cast attempt was unsuccessful" control nodes: merge them if
// there is more than one.
if (merge_controls.size() > 0) {
merge_controls.emplace_back(not_subtype);
merge_effects.emplace_back(effect());
// Range is 1..3, so casting to int is safe.
DCHECK_EQ(merge_controls.size(), merge_effects.size());
unsigned count = static_cast<unsigned>(merge_controls.size());
*no_match_control = Merge(count, merge_controls.data());
// EffectPhis need their control dependency as an additional input.
merge_effects.emplace_back(*no_match_control);
*no_match_effect = EffectPhi(count, merge_effects.data());
} else {
*no_match_control = not_subtype;
*no_match_effect = effect();
}
// Return value is not used, but we need it for compatibility
// with graph-builder-interface.
return nullptr;
}
Node* WasmGraphBuilder::StructGet(Node* struct_object,
const wasm::StructType* struct_type,
uint32_t field_index, CheckForNull null_check,
bool is_signed,
wasm::WasmCodePosition position) {
if (null_check == kWithNullCheck) {
TrapIfTrue(wasm::kTrapNullDereference,
gasm_->WordEqual(struct_object, RefNull()), position);
}
MachineType machine_type = FieldType(struct_type, field_index, is_signed);
Node* offset = FieldOffset(mcgraph(), struct_type, field_index);
return LoadWithTaggedAlignment(gasm_.get(), machine_type, struct_object,
offset);
}
Node* WasmGraphBuilder::StructSet(Node* struct_object,
const wasm::StructType* struct_type,
uint32_t field_index, Node* field_value,
CheckForNull null_check,
wasm::WasmCodePosition position) {
if (null_check == kWithNullCheck) {
TrapIfTrue(wasm::kTrapNullDereference,
gasm_->WordEqual(struct_object, RefNull()), position);
}
return StoreStructFieldUnchecked(mcgraph(), gasm_.get(), struct_object,
struct_type, field_index, field_value);
}
void WasmGraphBuilder::BoundsCheck(Node* array, Node* index,
wasm::WasmCodePosition position) {
Node* length = ArrayLength(gasm_.get(), array);
TrapIfFalse(wasm::kTrapArrayOutOfBounds, gasm_->Uint32LessThan(index, length),
position);
}
Node* WasmGraphBuilder::ArrayGet(Node* array_object,
const wasm::ArrayType* type, Node* index,
CheckForNull null_check, bool is_signed,
wasm::WasmCodePosition position) {
if (null_check == kWithNullCheck) {
TrapIfTrue(wasm::kTrapNullDereference,
gasm_->WordEqual(array_object, RefNull()), position);
}
BoundsCheck(array_object, index, position);
MachineType machine_type = MachineType::TypeForRepresentation(
type->element_type().machine_representation(), is_signed);
Node* offset = ArrayElementOffset(gasm_.get(), index, type->element_type());
return LoadWithTaggedAlignment(gasm_.get(), machine_type, array_object,
offset);
}
Node* WasmGraphBuilder::ArraySet(Node* array_object,
const wasm::ArrayType* type, Node* index,
Node* value, CheckForNull null_check,
wasm::WasmCodePosition position) {
if (null_check == kWithNullCheck) {
TrapIfTrue(wasm::kTrapNullDereference,
gasm_->WordEqual(array_object, RefNull()), position);
}
BoundsCheck(array_object, index, position);
Node* offset = ArrayElementOffset(gasm_.get(), index, type->element_type());
return StoreWithTaggedAlignment(gasm_.get(), array_object, offset, value,
type->element_type());
}
Node* WasmGraphBuilder::ArrayLen(Node* array_object,
wasm::WasmCodePosition position) {
TrapIfTrue(wasm::kTrapNullDereference,
gasm_->WordEqual(array_object, RefNull()), position);
return ArrayLength(gasm_.get(), array_object);
}
// 1 bit V8 Smi tag, 31 bits V8 Smi shift, 1 bit i31ref high-bit truncation.
constexpr int kI31To32BitSmiShift = 33;
Node* WasmGraphBuilder::I31New(Node* input) {
if (SmiValuesAre31Bits()) {
return gasm_->Word32Shl(input, BuildSmiShiftBitsConstant32());
}
DCHECK(SmiValuesAre32Bits());
input = BuildChangeInt32ToIntPtr(input);
return gasm_->WordShl(input, gasm_->IntPtrConstant(kI31To32BitSmiShift));
}
Node* WasmGraphBuilder::I31GetS(Node* input) {
if (SmiValuesAre31Bits()) {
input = BuildTruncateIntPtrToInt32(input);
return gasm_->Word32SarShiftOutZeros(input, BuildSmiShiftBitsConstant32());
}
DCHECK(SmiValuesAre32Bits());
return BuildTruncateIntPtrToInt32(
gasm_->WordSar(input, gasm_->IntPtrConstant(kI31To32BitSmiShift)));
}
Node* WasmGraphBuilder::I31GetU(Node* input) {
if (SmiValuesAre31Bits()) {
input = BuildTruncateIntPtrToInt32(input);
return gasm_->Word32Shr(input, BuildSmiShiftBitsConstant32());
}
DCHECK(SmiValuesAre32Bits());
return BuildTruncateIntPtrToInt32(
gasm_->WordShr(input, gasm_->IntPtrConstant(kI31To32BitSmiShift)));
}
class WasmDecorator final : public GraphDecorator {
public:
explicit WasmDecorator(NodeOriginTable* origins, wasm::Decoder* decoder)
: origins_(origins), decoder_(decoder) {}
void Decorate(Node* node) final {
origins_->SetNodeOrigin(
node, NodeOrigin("wasm graph creation", "n/a",
NodeOrigin::kWasmBytecode, decoder_->position()));
}
private:
compiler::NodeOriginTable* origins_;
wasm::Decoder* decoder_;
};
void WasmGraphBuilder::AddBytecodePositionDecorator(
NodeOriginTable* node_origins, wasm::Decoder* decoder) {
DCHECK_NULL(decorator_);
decorator_ = graph()->zone()->New<WasmDecorator>(node_origins, decoder);
graph()->AddDecorator(decorator_);
}
void WasmGraphBuilder::RemoveBytecodePositionDecorator() {
DCHECK_NOT_NULL(decorator_);
graph()->RemoveDecorator(decorator_);
decorator_ = nullptr;
}
namespace {
class WasmWrapperGraphBuilder : public WasmGraphBuilder {
public:
WasmWrapperGraphBuilder(Zone* zone, MachineGraph* mcgraph,
const wasm::FunctionSig* sig,
const wasm::WasmModule* module,
compiler::SourcePositionTable* spt,
StubCallMode stub_mode, wasm::WasmFeatures features)
: WasmGraphBuilder(nullptr, zone, mcgraph, sig, spt),
module_(module),
stub_mode_(stub_mode),
enabled_features_(features) {}
CallDescriptor* GetI64ToBigIntCallDescriptor() {
if (i64_to_bigint_descriptor_) return i64_to_bigint_descriptor_;
i64_to_bigint_descriptor_ =
GetBuiltinCallDescriptor<I64ToBigIntDescriptor>(this, stub_mode_);
AddInt64LoweringReplacement(
i64_to_bigint_descriptor_,
GetBuiltinCallDescriptor<I32PairToBigIntDescriptor>(this, stub_mode_));
return i64_to_bigint_descriptor_;
}
CallDescriptor* GetBigIntToI64CallDescriptor() {
if (bigint_to_i64_descriptor_) return bigint_to_i64_descriptor_;
bigint_to_i64_descriptor_ =
GetBuiltinCallDescriptor<BigIntToI64Descriptor>(this, stub_mode_);
AddInt64LoweringReplacement(
bigint_to_i64_descriptor_,
GetBuiltinCallDescriptor<BigIntToI32PairDescriptor>(this, stub_mode_));
return bigint_to_i64_descriptor_;
}
Node* GetTargetForBuiltinCall(wasm::WasmCode::RuntimeStubId wasm_stub,
Builtins::Name builtin_id) {
return (stub_mode_ == StubCallMode::kCallWasmRuntimeStub)
? mcgraph()->RelocatableIntPtrConstant(wasm_stub,
RelocInfo::WASM_STUB_CALL)
: GetBuiltinPointerTarget(builtin_id);
}
Node* BuildLoadUndefinedValueFromInstance() {
if (undefined_value_node_ == nullptr) {
Node* isolate_root = graph()->NewNode(
mcgraph()->machine()->Load(MachineType::Pointer()),
instance_node_.get(),
mcgraph()->Int32Constant(WASM_INSTANCE_OBJECT_OFFSET(IsolateRoot)),
graph()->start(), graph()->start());
undefined_value_node_ = graph()->NewNode(
mcgraph()->machine()->Load(MachineType::Pointer()), isolate_root,
mcgraph()->Int32Constant(
IsolateData::root_slot_offset(RootIndex::kUndefinedValue)),
isolate_root, graph()->start());
}
return undefined_value_node_.get();
}
Node* BuildChangeInt32ToNumber(Node* value) {
// We expect most integers at runtime to be Smis, so it is important for
// wrapper performance that Smi conversion be inlined.
if (SmiValuesAre32Bits()) {
return BuildChangeInt32ToSmi(value);
}
DCHECK(SmiValuesAre31Bits());
auto builtin = gasm_->MakeDeferredLabel();
auto done = gasm_->MakeLabel(MachineRepresentation::kTagged);
// Double value to test if value can be a Smi, and if so, to convert it.
Node* add = gasm_->Int32AddWithOverflow(value, value);
Node* ovf = gasm_->Projection(1, add);
gasm_->GotoIf(ovf, &builtin);
// If it didn't overflow, the result is {2 * value} as pointer-sized value.
Node* smi_tagged = BuildChangeInt32ToIntPtr(gasm_->Projection(0, add));
gasm_->Goto(&done, smi_tagged);
// Otherwise, call builtin, to convert to a HeapNumber.
gasm_->Bind(&builtin);
CommonOperatorBuilder* common = mcgraph()->common();
Node* target =
GetTargetForBuiltinCall(wasm::WasmCode::kWasmInt32ToHeapNumber,
Builtins::kWasmInt32ToHeapNumber);
if (!int32_to_heapnumber_operator_.is_set()) {
auto call_descriptor = Linkage::GetStubCallDescriptor(
mcgraph()->zone(), WasmInt32ToHeapNumberDescriptor(), 0,
CallDescriptor::kNoFlags, Operator::kNoProperties, stub_mode_);
int32_to_heapnumber_operator_.set(common->Call(call_descriptor));
}
Node* call =
gasm_->Call(int32_to_heapnumber_operator_.get(), target, value);
gasm_->Goto(&done, call);
gasm_->Bind(&done);
return done.PhiAt(0);
}
Node* BuildChangeTaggedToInt32(Node* value, Node* context) {
// We expect most integers at runtime to be Smis, so it is important for
// wrapper performance that Smi conversion be inlined.
auto builtin = gasm_->MakeDeferredLabel();
auto done = gasm_->MakeLabel(MachineRepresentation::kWord32);
// Test if value is a Smi.
Node* is_smi =
gasm_->Word32Equal(gasm_->Word32And(BuildTruncateIntPtrToInt32(value),
gasm_->Int32Constant(kSmiTagMask)),
gasm_->Int32Constant(0));
gasm_->GotoIfNot(is_smi, &builtin);
// If Smi, convert to int32.
Node* smi = BuildChangeSmiToInt32(value);
gasm_->Goto(&done, smi);
// Otherwise, call builtin which changes non-Smi to Int32.
gasm_->Bind(&builtin);
CommonOperatorBuilder* common = mcgraph()->common();
Node* target =
GetTargetForBuiltinCall(wasm::WasmCode::kWasmTaggedNonSmiToInt32,
Builtins::kWasmTaggedNonSmiToInt32);
if (!tagged_non_smi_to_int32_operator_.is_set()) {
auto call_descriptor = Linkage::GetStubCallDescriptor(
mcgraph()->zone(), WasmTaggedNonSmiToInt32Descriptor(), 0,
CallDescriptor::kNoFlags, Operator::kNoProperties, stub_mode_);
tagged_non_smi_to_int32_operator_.set(common->Call(call_descriptor));
}
Node* call = gasm_->Call(tagged_non_smi_to_int32_operator_.get(), target,
value, context);
SetSourcePosition(call, 1);
gasm_->Goto(&done, call);
gasm_->Bind(&done);
return done.PhiAt(0);
}
Node* BuildChangeFloat32ToNumber(Node* value) {
CommonOperatorBuilder* common = mcgraph()->common();
Node* target = GetTargetForBuiltinCall(wasm::WasmCode::kWasmFloat32ToNumber,
Builtins::kWasmFloat32ToNumber);
if (!float32_to_number_operator_.is_set()) {
auto call_descriptor = Linkage::GetStubCallDescriptor(
mcgraph()->zone(), WasmFloat32ToNumberDescriptor(), 0,
CallDescriptor::kNoFlags, Operator::kNoProperties, stub_mode_);
float32_to_number_operator_.set(common->Call(call_descriptor));
}
return gasm_->Call(float32_to_number_operator_.get(), target, value);
}
Node* BuildChangeFloat64ToNumber(Node* value) {
CommonOperatorBuilder* common = mcgraph()->common();
Node* target = GetTargetForBuiltinCall(wasm::WasmCode::kWasmFloat64ToNumber,
Builtins::kWasmFloat64ToNumber);
if (!float64_to_number_operator_.is_set()) {
auto call_descriptor = Linkage::GetStubCallDescriptor(
mcgraph()->zone(), WasmFloat64ToNumberDescriptor(), 0,
CallDescriptor::kNoFlags, Operator::kNoProperties, stub_mode_);
float64_to_number_operator_.set(common->Call(call_descriptor));
}
return gasm_->Call(float64_to_number_operator_.get(), target, value);
}
Node* BuildChangeTaggedToFloat64(Node* value, Node* context) {
CommonOperatorBuilder* common = mcgraph()->common();
Node* target = GetTargetForBuiltinCall(wasm::WasmCode::kWasmTaggedToFloat64,
Builtins::kWasmTaggedToFloat64);
if (!tagged_to_float64_operator_.is_set()) {
auto call_descriptor = Linkage::GetStubCallDescriptor(
mcgraph()->zone(), WasmTaggedToFloat64Descriptor(), 0,
CallDescriptor::kNoFlags, Operator::kNoProperties, stub_mode_);
tagged_to_float64_operator_.set(common->Call(call_descriptor));
}
Node* call =
gasm_->Call(tagged_to_float64_operator_.get(), target, value, context);
SetSourcePosition(call, 1);
return call;
}
int AddArgumentNodes(Vector<Node*> args, int pos, int param_count,
const wasm::FunctionSig* sig) {
// Convert wasm numbers to JS values.
for (int i = 0; i < param_count; ++i) {
Node* param =
Param(i + 1); // Start from index 1 to drop the instance_node.
args[pos++] = ToJS(param, sig->GetParam(i));
}
return pos;
}
Node* ToJS(Node* node, wasm::ValueType type) {
switch (type.kind()) {
case wasm::ValueType::kI32:
return BuildChangeInt32ToNumber(node);
case wasm::ValueType::kS128:
UNREACHABLE();
case wasm::ValueType::kI64: {
DCHECK(enabled_features_.has_bigint());
return BuildChangeInt64ToBigInt(node);
}
case wasm::ValueType::kF32:
return BuildChangeFloat32ToNumber(node);
case wasm::ValueType::kF64:
return BuildChangeFloat64ToNumber(node);
case wasm::ValueType::kRef:
case wasm::ValueType::kOptRef: {
uint32_t representation = type.heap_representation();
if (representation == wasm::HeapType::kExtern ||
representation == wasm::HeapType::kExn ||
representation == wasm::HeapType::kFunc) {
return node;
}
if (representation == wasm::HeapType::kEq) {
return BuildAllocateObjectWrapper(node);
}
if (type.has_index() && module_->has_signature(type.ref_index())) {
// Typed function
return node;
}
// TODO(7748): Figure out a JS interop story for arrays and structs.
// If this is reached, then IsJSCompatibleSignature() is too permissive.
UNREACHABLE();
}
case wasm::ValueType::kRtt:
// TODO(7748): Figure out what to do for RTTs.
UNIMPLEMENTED();
case wasm::ValueType::kI8:
case wasm::ValueType::kI16:
case wasm::ValueType::kStmt:
case wasm::ValueType::kBottom:
UNREACHABLE();
}
}
// TODO(7748): Temporary solution to allow round-tripping of Wasm objects
// through JavaScript, where they show up as opaque boxes. This will disappear
// once we have a proper WasmGC <-> JS interaction story.
Node* BuildAllocateObjectWrapper(Node* input) {
return CALL_BUILTIN(
WasmAllocateObjectWrapper, input,
LOAD_INSTANCE_FIELD(NativeContext, MachineType::TaggedPointer()));
}
Node* BuildUnpackObjectWrapper(Node* input) {
Node* obj = CALL_BUILTIN(
WasmGetOwnProperty, input,
LOAD_FULL_POINTER(BuildLoadIsolateRoot(),
IsolateData::root_slot_offset(
RootIndex::kwasm_wrapped_object_symbol)),
LOAD_INSTANCE_FIELD(NativeContext, MachineType::TaggedPointer()));
// Invalid object wrappers (i.e. any other JS object that doesn't have the
// magic hidden property) will return {undefined}. Map that to {null}.
Node* undefined = LOAD_FULL_POINTER(
BuildLoadIsolateRoot(),
IsolateData::root_slot_offset(RootIndex::kUndefinedValue));
Node* is_undefined = gasm_->WordEqual(obj, undefined);
Diamond check(graph(), mcgraph()->common(), is_undefined,
BranchHint::kFalse);
check.Chain(control());
return check.Phi(MachineRepresentation::kTagged, RefNull(), obj);
}
Node* BuildChangeInt64ToBigInt(Node* input) {
const Operator* call =
mcgraph()->common()->Call(GetI64ToBigIntCallDescriptor());
Node* target;
if (mcgraph()->machine()->Is64()) {
target = GetTargetForBuiltinCall(wasm::WasmCode::kI64ToBigInt,
Builtins::kI64ToBigInt);
} else {
DCHECK(mcgraph()->machine()->Is32());
// On 32-bit platforms we already set the target to the
// I32PairToBigInt builtin here, so that we don't have to replace the
// target in the int64-lowering.
target = GetTargetForBuiltinCall(wasm::WasmCode::kI32PairToBigInt,
Builtins::kI32PairToBigInt);
}
return SetEffectControl(
graph()->NewNode(call, target, input, effect(), control()));
}
Node* BuildChangeBigIntToInt64(Node* input, Node* context) {
const Operator* call =
mcgraph()->common()->Call(GetBigIntToI64CallDescriptor());
Node* target;
if (mcgraph()->machine()->Is64()) {
target = GetTargetForBuiltinCall(wasm::WasmCode::kBigIntToI64,
Builtins::kBigIntToI64);
} else {
DCHECK(mcgraph()->machine()->Is32());
// On 32-bit platforms we already set the target to the
// BigIntToI32Pair builtin here, so that we don't have to replace the
// target in the int64-lowering.
target = GetTargetForBuiltinCall(wasm::WasmCode::kBigIntToI32Pair,
Builtins::kBigIntToI32Pair);
}
return SetEffectControl(
graph()->NewNode(call, target, input, context, effect(), control()));
}
void BuildCheckValidRefValue(Node* input, Node* js_context,
wasm::ValueType type) {
// Make sure ValueType fits in a Smi.
STATIC_ASSERT(wasm::ValueType::kLastUsedBit + 1 <= kSmiValueSize);
Node* inputs[] = {instance_node_.get(), input,
mcgraph()->IntPtrConstant(
IntToSmi(static_cast<int>(type.raw_bit_field())))};
Node* check = BuildChangeSmiToInt32(SetEffect(BuildCallToRuntimeWithContext(
Runtime::kWasmIsValidRefValue, js_context, inputs, 3)));
Diamond type_check(graph(), mcgraph()->common(), check, BranchHint::kTrue);
type_check.Chain(control());
SetControl(type_check.if_false);
Node* old_effect = effect();
BuildCallToRuntimeWithContext(Runtime::kWasmThrowJSTypeError, js_context,
nullptr, 0);
SetEffectControl(type_check.EffectPhi(old_effect, effect()),
type_check.merge);
}
Node* FromJS(Node* input, Node* js_context, wasm::ValueType type) {
switch (type.kind()) {
case wasm::ValueType::kRef:
case wasm::ValueType::kOptRef: {
switch (type.heap_representation()) {
case wasm::HeapType::kExtern:
case wasm::HeapType::kExn:
return input;
case wasm::HeapType::kFunc:
BuildCheckValidRefValue(input, js_context, type);
return input;
case wasm::HeapType::kEq:
BuildCheckValidRefValue(input, js_context, type);
return BuildUnpackObjectWrapper(input);
case wasm::HeapType::kI31:
// If this is reached, then IsJSCompatibleSignature() is too
// permissive.
UNREACHABLE();
default:
if (module_->has_signature(type.ref_index())) {
BuildCheckValidRefValue(input, js_context, type);
return input;
}
// If this is reached, then IsJSCompatibleSignature() is too
// permissive.
UNREACHABLE();
}
}
case wasm::ValueType::kF32:
return graph()->NewNode(
mcgraph()->machine()->TruncateFloat64ToFloat32(),
BuildChangeTaggedToFloat64(input, js_context));
case wasm::ValueType::kF64:
return BuildChangeTaggedToFloat64(input, js_context);
case wasm::ValueType::kI32:
return BuildChangeTaggedToInt32(input, js_context);
case wasm::ValueType::kI64:
// i64 values can only come from BigInt.
DCHECK(enabled_features_.has_bigint());
return BuildChangeBigIntToInt64(input, js_context);
case wasm::ValueType::kRtt: // TODO(7748): Implement.
case wasm::ValueType::kS128:
case wasm::ValueType::kI8:
case wasm::ValueType::kI16:
case wasm::ValueType::kBottom:
case wasm::ValueType::kStmt:
UNREACHABLE();
break;
}
}
Node* SmiToFloat32(Node* input) {
return graph()->NewNode(mcgraph()->machine()->RoundInt32ToFloat32(),
BuildChangeSmiToInt32(input));
}
Node* SmiToFloat64(Node* input) {
return graph()->NewNode(mcgraph()->machine()->ChangeInt32ToFloat64(),
BuildChangeSmiToInt32(input));
}
Node* HeapNumberToFloat64(Node* input) {
return gasm_->Load(MachineType::Float64(), input,
wasm::ObjectAccess::ToTagged(HeapNumber::kValueOffset));
}
Node* FromJSFast(Node* input, wasm::ValueType type) {
switch (type.kind()) {
case wasm::ValueType::kI32:
return BuildChangeSmiToInt32(input);
case wasm::ValueType::kF32: {
auto done = gasm_->MakeLabel(MachineRepresentation::kFloat32);
auto heap_number = gasm_->MakeLabel();
gasm_->GotoIfNot(IsSmi(input), &heap_number);
gasm_->Goto(&done, SmiToFloat32(input));
gasm_->Bind(&heap_number);
Node* value =
graph()->NewNode(mcgraph()->machine()->TruncateFloat64ToFloat32(),
HeapNumberToFloat64(input));
gasm_->Goto(&done, value);
gasm_->Bind(&done);
return done.PhiAt(0);
}
case wasm::ValueType::kF64: {
auto done = gasm_->MakeLabel(MachineRepresentation::kFloat64);
auto heap_number = gasm_->MakeLabel();
gasm_->GotoIfNot(IsSmi(input), &heap_number);
gasm_->Goto(&done, SmiToFloat64(input));
gasm_->Bind(&heap_number);
gasm_->Goto(&done, HeapNumberToFloat64(input));
gasm_->Bind(&done);
return done.PhiAt(0);
}
case wasm::ValueType::kRef:
case wasm::ValueType::kOptRef:
case wasm::ValueType::kI64:
case wasm::ValueType::kRtt:
case wasm::ValueType::kS128:
case wasm::ValueType::kI8:
case wasm::ValueType::kI16:
case wasm::ValueType::kBottom:
case wasm::ValueType::kStmt:
UNREACHABLE();
break;
}
}
void BuildModifyThreadInWasmFlag(bool new_value) {
if (!trap_handler::IsTrapHandlerEnabled()) return;
Node* isolate_root = BuildLoadIsolateRoot();
Node* thread_in_wasm_flag_address =
gasm_->Load(MachineType::Pointer(), isolate_root,
Isolate::thread_in_wasm_flag_address_offset());
if (FLAG_debug_code) {
Node* flag_value = SetEffect(
graph()->NewNode(mcgraph()->machine()->Load(MachineType::Pointer()),
thread_in_wasm_flag_address,
mcgraph()->Int32Constant(0), effect(), control()));
Node* check =
graph()->NewNode(mcgraph()->machine()->Word32Equal(), flag_value,
mcgraph()->Int32Constant(new_value ? 0 : 1));
Diamond flag_check(graph(), mcgraph()->common(), check,
BranchHint::kTrue);
flag_check.Chain(control());
SetControl(flag_check.if_false);
Node* message_id = graph()->NewNode(
mcgraph()->common()->NumberConstant(static_cast<int32_t>(
new_value ? AbortReason::kUnexpectedThreadInWasmSet
: AbortReason::kUnexpectedThreadInWasmUnset)));
Node* old_effect = effect();
BuildCallToRuntimeWithContext(Runtime::kAbort, NoContextConstant(),
&message_id, 1);
SetEffectControl(flag_check.EffectPhi(old_effect, effect()),
flag_check.merge);
}
SetEffect(graph()->NewNode(
mcgraph()->machine()->Store(StoreRepresentation(
MachineRepresentation::kWord32, kNoWriteBarrier)),
thread_in_wasm_flag_address, mcgraph()->Int32Constant(0),
mcgraph()->Int32Constant(new_value ? 1 : 0), effect(), control()));
}
Node* BuildLoadInstanceFromExportedFunctionData(Node* function_data) {
return gasm_->Load(
MachineType::AnyTagged(), function_data,
WasmExportedFunctionData::kInstanceOffset - kHeapObjectTag);
}
Node* BuildMultiReturnFixedArrayFromIterable(const wasm::FunctionSig* sig,
Node* iterable, Node* context) {
Node* length = BuildChangeUint31ToSmi(
mcgraph()->Uint32Constant(static_cast<uint32_t>(sig->return_count())));
return CALL_BUILTIN(IterableToFixedArrayForWasm, iterable, length, context);
}
// Extract the FixedArray implementing
// the backing storage of a JavaScript array.
Node* BuildLoadArrayBackingStorage(Node* js_array) {
return gasm_->Load(MachineType::AnyTagged(), js_array,
JSObject::kElementsOffset - kHeapObjectTag);
}
// Generate a call to the AllocateJSArray builtin.
Node* BuildCallAllocateJSArray(Node* array_length, Node* context) {
// Since we don't check that args will fit in an array,
// we make sure this is true based on statically known limits.
STATIC_ASSERT(wasm::kV8MaxWasmFunctionMultiReturns <=
JSArray::kInitialMaxFastElementArray);
return SetControl(CALL_BUILTIN(WasmAllocateJSArray, array_length, context));
}
Node* BuildCallAndReturn(bool is_import, Node* js_context,
Node* function_data,
base::SmallVector<Node*, 16> args) {
// Set the ThreadInWasm flag before we do the actual call.
BuildModifyThreadInWasmFlag(true);
const int rets_count = static_cast<int>(sig_->return_count());
base::SmallVector<Node*, 1> rets(rets_count);
if (is_import) {
// Call to an imported function.
// Load function index from {WasmExportedFunctionData}.
Node* function_index =
BuildLoadFunctionIndexFromExportedFunctionData(function_data);
BuildImportCall(sig_, VectorOf(args), VectorOf(rets),
wasm::kNoCodePosition, function_index, kCallContinues);
} else {
// Call to a wasm function defined in this module.
// The call target is the jump table slot for that function.
Node* jump_table_start =
LOAD_INSTANCE_FIELD(JumpTableStart, MachineType::Pointer());
Node* jump_table_offset =
BuildLoadJumpTableOffsetFromExportedFunctionData(function_data);
Node* jump_table_slot = graph()->NewNode(
mcgraph()->machine()->IntAdd(), jump_table_start, jump_table_offset);
args[0] = jump_table_slot;
BuildWasmCall(sig_, VectorOf(args), VectorOf(rets), wasm::kNoCodePosition,
nullptr, kNoRetpoline);
}
// Clear the ThreadInWasm flag.
BuildModifyThreadInWasmFlag(false);
Node* jsval;
if (sig_->return_count() == 0) {
jsval = BuildLoadUndefinedValueFromInstance();
} else if (sig_->return_count() == 1) {
jsval = ToJS(rets[0], sig_->GetReturn());
} else {
int32_t return_count = static_cast<int32_t>(sig_->return_count());
Node* size =
graph()->NewNode(mcgraph()->common()->NumberConstant(return_count));
jsval = BuildCallAllocateJSArray(size, js_context);
Node* fixed_array = BuildLoadArrayBackingStorage(jsval);
for (int i = 0; i < return_count; ++i) {
Node* value = ToJS(rets[i], sig_->GetReturn(i));
STORE_FIXED_ARRAY_SLOT_ANY(fixed_array, i, value);
}
}
return jsval;
}
bool QualifiesForFastTransform(const wasm::FunctionSig*) {
const int wasm_count = static_cast<int>(sig_->parameter_count());
for (int i = 0; i < wasm_count; ++i) {
wasm::ValueType type = sig_->GetParam(i);
switch (type.kind()) {
case wasm::ValueType::kRef:
case wasm::ValueType::kOptRef:
case wasm::ValueType::kI64:
case wasm::ValueType::kRtt:
case wasm::ValueType::kS128:
case wasm::ValueType::kI8:
case wasm::ValueType::kI16:
case wasm::ValueType::kBottom:
case wasm::ValueType::kStmt:
return false;
case wasm::ValueType::kI32:
case wasm::ValueType::kF32:
case wasm::ValueType::kF64:
break;
}
}
return true;
}
Node* IsSmi(Node* input) {
return gasm_->Word32Equal(
gasm_->Word32And(BuildTruncateIntPtrToInt32(input),
gasm_->Int32Constant(kSmiTagMask)),
gasm_->Int32Constant(0));
}
void CanTransformFast(
Node* input, wasm::ValueType type,
v8::internal::compiler::GraphAssemblerLabel<0>* slow_path) {
switch (type.kind()) {
case wasm::ValueType::kI32: {
gasm_->GotoIfNot(IsSmi(input), slow_path);
return;
}
case wasm::ValueType::kF32:
case wasm::ValueType::kF64: {
auto done = gasm_->MakeLabel();
gasm_->GotoIf(IsSmi(input), &done);
Node* map =
gasm_->Load(MachineType::TaggedPointer(), input,
wasm::ObjectAccess::ToTagged(HeapObject::kMapOffset));
Node* heap_number_map = LOAD_FULL_POINTER(
BuildLoadIsolateRoot(),
IsolateData::root_slot_offset(RootIndex::kHeapNumberMap));
Node* is_heap_number = gasm_->WordEqual(heap_number_map, map);
gasm_->GotoIf(is_heap_number, &done);
gasm_->Goto(slow_path);
gasm_->Bind(&done);
return;
}
case wasm::ValueType::kRef:
case wasm::ValueType::kOptRef:
case wasm::ValueType::kI64:
case wasm::ValueType::kRtt:
case wasm::ValueType::kS128:
case wasm::ValueType::kI8:
case wasm::ValueType::kI16:
case wasm::ValueType::kBottom:
case wasm::ValueType::kStmt:
UNREACHABLE();
break;
}
}
void BuildJSToWasmWrapper(bool is_import) {
const int wasm_count = static_cast<int>(sig_->parameter_count());
// Build the start and the JS parameter nodes.
SetEffectControl(Start(wasm_count + 5));
// Create the js_closure and js_context parameters.
Node* js_closure =
graph()->NewNode(mcgraph()->common()->Parameter(
Linkage::kJSCallClosureParamIndex, "%closure"),
graph()->start());
Node* js_context = graph()->NewNode(
mcgraph()->common()->Parameter(
Linkage::GetJSCallContextParamIndex(wasm_count + 1), "%context"),
graph()->start());
// Create the instance_node node to pass as parameter. It is loaded from
// an actual reference to an instance or a placeholder reference,
// called {WasmExportedFunction} via the {WasmExportedFunctionData}
// structure.
Node* function_data = BuildLoadFunctionDataFromJSFunction(js_closure);
instance_node_.set(
BuildLoadInstanceFromExportedFunctionData(function_data));
if (!wasm::IsJSCompatibleSignature(sig_, module_, enabled_features_)) {
// Throw a TypeError. Use the js_context of the calling javascript
// function (passed as a parameter), such that the generated code is
// js_context independent.
BuildCallToRuntimeWithContext(Runtime::kWasmThrowJSTypeError, js_context,
nullptr, 0);
TerminateThrow(effect(), control());
return;
}
const int args_count = wasm_count + 1; // +1 for wasm_code.
// Check whether the signature of the function allows for a fast
// transformation (if any params exist that need transformation).
// Create a fast transformation path, only if it does.
bool include_fast_path = wasm_count && QualifiesForFastTransform(sig_);
// Prepare Param() nodes. Param() nodes can only be created once,
// so we need to use the same nodes along all possible transformation paths.
base::SmallVector<Node*, 16> params(args_count);
for (int i = 0; i < wasm_count; ++i) params[i + 1] = Param(i + 1);
auto done = gasm_->MakeLabel(MachineRepresentation::kTagged);
if (include_fast_path) {
auto slow_path = gasm_->MakeDeferredLabel();
// Check if the params received on runtime can be actually transformed
// using the fast transformation. When a param that cannot be transformed
// fast is encountered, skip checking the rest and fall back to the slow
// path.
for (int i = 0; i < wasm_count; ++i) {
CanTransformFast(params[i + 1], sig_->GetParam(i), &slow_path);
}
// Convert JS parameters to wasm numbers using the fast transformation
// and build the call.
base::SmallVector<Node*, 16> args(args_count);
for (int i = 0; i < wasm_count; ++i) {
Node* wasm_param = FromJSFast(params[i + 1], sig_->GetParam(i));
args[i + 1] = wasm_param;
}
Node* jsval =
BuildCallAndReturn(is_import, js_context, function_data, args);
gasm_->Goto(&done, jsval);
gasm_->Bind(&slow_path);
}
// Convert JS parameters to wasm numbers using the default transformation
// and build the call.
base::SmallVector<Node*, 16> args(args_count);
for (int i = 0; i < wasm_count; ++i) {
Node* wasm_param = FromJS(params[i + 1], js_context, sig_->GetParam(i));
args[i + 1] = wasm_param;
}
Node* jsval =
BuildCallAndReturn(is_import, js_context, function_data, args);
// If both the default and a fast transformation paths are present,
// get the return value based on the path used.
if (include_fast_path) {
gasm_->Goto(&done, jsval);
gasm_->Bind(&done);
Return(done.PhiAt(0));
} else {
Return(jsval);
}
if (ContainsInt64(sig_)) LowerInt64(kCalledFromJS);
}
Node* BuildReceiverNode(Node* callable_node, Node* native_context,
Node* undefined_node) {
// Check function strict bit.
Node* shared_function_info = gasm_->Load(
MachineType::TaggedPointer(), callable_node,
wasm::ObjectAccess::SharedFunctionInfoOffsetInTaggedJSFunction());
Node* flags =
gasm_->Load(MachineType::Int32(), shared_function_info,
wasm::ObjectAccess::FlagsOffsetInSharedFunctionInfo());
Node* strict_check =
Binop(wasm::kExprI32And, flags,
mcgraph()->Int32Constant(SharedFunctionInfo::IsNativeBit::kMask |
SharedFunctionInfo::IsStrictBit::kMask));
// Load global receiver if sloppy else use undefined.
Diamond strict_d(graph(), mcgraph()->common(), strict_check,
BranchHint::kNone);
Node* old_effect = effect();
SetControl(strict_d.if_false);
Node* global_proxy =
LOAD_FIXED_ARRAY_SLOT_PTR(native_context, Context::GLOBAL_PROXY_INDEX);
SetEffectControl(strict_d.EffectPhi(old_effect, global_proxy),
strict_d.merge);
return strict_d.Phi(MachineRepresentation::kTagged, undefined_node,
global_proxy);
}
bool BuildWasmToJSWrapper(WasmImportCallKind kind, int expected_arity) {
int wasm_count = static_cast<int>(sig_->parameter_count());
// Build the start and the parameter nodes.
SetEffectControl(Start(wasm_count + 4));
instance_node_.set(Param(wasm::kWasmInstanceParameterIndex));
Node* native_context =
LOAD_INSTANCE_FIELD(NativeContext, MachineType::TaggedPointer());
if (kind == WasmImportCallKind::kRuntimeTypeError) {
// =======================================================================
// === Runtime TypeError =================================================
// =======================================================================
BuildCallToRuntimeWithContext(Runtime::kWasmThrowJSTypeError,
native_context, nullptr, 0);
TerminateThrow(effect(), control());
return false;
}
// The callable is passed as the last parameter, after Wasm arguments.
Node* callable_node = Param(wasm_count + 1);
Node* undefined_node = BuildLoadUndefinedValueFromInstance();
Node* call = nullptr;
// Clear the ThreadInWasm flag.
BuildModifyThreadInWasmFlag(false);
switch (kind) {
// =======================================================================
// === JS Functions with matching arity ==================================
// =======================================================================
case WasmImportCallKind::kJSFunctionArityMatch: {
base::SmallVector<Node*, 16> args(wasm_count + 7);
int pos = 0;
Node* function_context =
gasm_->Load(MachineType::TaggedPointer(), callable_node,
wasm::ObjectAccess::ContextOffsetInTaggedJSFunction());
args[pos++] = callable_node; // target callable.
// Determine receiver at runtime.
args[pos++] =
BuildReceiverNode(callable_node, native_context, undefined_node);
auto call_descriptor = Linkage::GetJSCallDescriptor(
graph()->zone(), false, wasm_count + 1, CallDescriptor::kNoFlags);
// Convert wasm numbers to JS values.
pos = AddArgumentNodes(VectorOf(args), pos, wasm_count, sig_);
args[pos++] = undefined_node; // new target
args[pos++] = mcgraph()->Int32Constant(wasm_count); // argument count
args[pos++] = function_context;
args[pos++] = effect();
args[pos++] = control();
DCHECK_EQ(pos, args.size());
call = graph()->NewNode(mcgraph()->common()->Call(call_descriptor), pos,
args.begin());
break;
}
#ifdef V8_NO_ARGUMENTS_ADAPTOR
// =======================================================================
// === JS Functions with mismatching arity ===============================
// =======================================================================
case WasmImportCallKind::kJSFunctionArityMismatch: {
int pushed_count = std::max(expected_arity, wasm_count);
base::SmallVector<Node*, 16> args(pushed_count + 7);
int pos = 0;
args[pos++] = callable_node; // target callable.
// Determine receiver at runtime.
args[pos++] =
BuildReceiverNode(callable_node, native_context, undefined_node);
// Convert wasm numbers to JS values.
pos = AddArgumentNodes(VectorOf(args), pos, wasm_count, sig_);
for (int i = wasm_count; i < expected_arity; ++i) {
args[pos++] = undefined_node;
}
args[pos++] = undefined_node; // new target
args[pos++] = mcgraph()->Int32Constant(wasm_count); // argument count
Node* function_context =
gasm_->Load(MachineType::TaggedPointer(), callable_node,
wasm::ObjectAccess::ContextOffsetInTaggedJSFunction());
args[pos++] = function_context;
args[pos++] = effect();
args[pos++] = control();
DCHECK_EQ(pos, args.size());
auto call_descriptor = Linkage::GetJSCallDescriptor(
graph()->zone(), false, pushed_count + 1, CallDescriptor::kNoFlags);
call = graph()->NewNode(mcgraph()->common()->Call(call_descriptor), pos,
args.begin());
break;
}
#else
// =======================================================================
// === JS Functions with mismatching arity ===============================
// =======================================================================
case WasmImportCallKind::kJSFunctionArityMismatch: {
base::SmallVector<Node*, 16> args(wasm_count + 9);
int pos = 0;
Node* function_context =
gasm_->Load(MachineType::TaggedPointer(), callable_node,
wasm::ObjectAccess::ContextOffsetInTaggedJSFunction());
args[pos++] =
GetBuiltinPointerTarget(Builtins::kArgumentsAdaptorTrampoline);
args[pos++] = callable_node; // target callable
args[pos++] = undefined_node; // new target
args[pos++] = mcgraph()->Int32Constant(wasm_count); // argument count
// Load shared function info, and then the formal parameter count.
Node* shared_function_info = gasm_->Load(
MachineType::TaggedPointer(), callable_node,
wasm::ObjectAccess::SharedFunctionInfoOffsetInTaggedJSFunction());
Node* formal_param_count = SetEffect(graph()->NewNode(
mcgraph()->machine()->Load(MachineType::Uint16()),
shared_function_info,
mcgraph()->Int32Constant(
wasm::ObjectAccess::
FormalParameterCountOffsetInSharedFunctionInfo()),
effect(), control()));
args[pos++] = formal_param_count;
// Determine receiver at runtime.
args[pos++] =
BuildReceiverNode(callable_node, native_context, undefined_node);
auto call_descriptor = Linkage::GetStubCallDescriptor(
mcgraph()->zone(), ArgumentsAdaptorDescriptor{}, 1 + wasm_count,
CallDescriptor::kNoFlags, Operator::kNoProperties,
StubCallMode::kCallBuiltinPointer);
// Convert wasm numbers to JS values.
pos = AddArgumentNodes(VectorOf(args), pos, wasm_count, sig_);
args[pos++] = function_context;
args[pos++] = effect();
args[pos++] = control();
DCHECK_EQ(pos, args.size());
call = graph()->NewNode(mcgraph()->common()->Call(call_descriptor), pos,
args.begin());
break;
}
#endif
// =======================================================================
// === General case of unknown callable ==================================
// =======================================================================
case WasmImportCallKind::kUseCallBuiltin: {
base::SmallVector<Node*, 16> args(wasm_count + 7);
int pos = 0;
args[pos++] = GetBuiltinPointerTarget(Builtins::kCall_ReceiverIsAny);
args[pos++] = callable_node;
args[pos++] = mcgraph()->Int32Constant(wasm_count); // argument count
args[pos++] = undefined_node; // receiver
auto call_descriptor = Linkage::GetStubCallDescriptor(
graph()->zone(), CallTrampolineDescriptor{}, wasm_count + 1,
CallDescriptor::kNoFlags, Operator::kNoProperties,
StubCallMode::kCallBuiltinPointer);
// Convert wasm numbers to JS values.
pos = AddArgumentNodes(VectorOf(args), pos, wasm_count, sig_);
// The native_context is sufficient here, because all kind of callables
// which depend on the context provide their own context. The context
// here is only needed if the target is a constructor to throw a
// TypeError, if the target is a native function, or if the target is a
// callable JSObject, which can only be constructed by the runtime.
args[pos++] = native_context;
args[pos++] = effect();
args[pos++] = control();
DCHECK_EQ(pos, args.size());
call = graph()->NewNode(mcgraph()->common()->Call(call_descriptor), pos,
args.begin());
break;
}
default:
UNREACHABLE();
}
DCHECK_NOT_NULL(call);
SetEffect(call);
SetSourcePosition(call, 0);
// Convert the return value(s) back.
if (sig_->return_count() <= 1) {
Node* val = sig_->return_count() == 0
? mcgraph()->Int32Constant(0)
: FromJS(call, native_context, sig_->GetReturn());
BuildModifyThreadInWasmFlag(true);
Return(val);
} else {
Node* fixed_array =
BuildMultiReturnFixedArrayFromIterable(sig_, call, native_context);
base::SmallVector<Node*, 8> wasm_values(sig_->return_count());
for (unsigned i = 0; i < sig_->return_count(); ++i) {
wasm_values[i] = FromJS(LOAD_FIXED_ARRAY_SLOT_ANY(fixed_array, i),
native_context, sig_->GetReturn(i));
}
BuildModifyThreadInWasmFlag(true);
Return(VectorOf(wasm_values));
}
if (ContainsInt64(sig_)) LowerInt64(kCalledFromWasm);
return true;
}
void BuildCapiCallWrapper(Address address) {
// Store arguments on our stack, then align the stack for calling to C.
int param_bytes = 0;
for (wasm::ValueType type : sig_->parameters()) {
param_bytes += type.element_size_bytes();
}
int return_bytes = 0;
for (wasm::ValueType type : sig_->returns()) {
return_bytes += type.element_size_bytes();
}
int stack_slot_bytes = std::max(param_bytes, return_bytes);
Node* values = stack_slot_bytes == 0
? mcgraph()->IntPtrConstant(0)
: graph()->NewNode(mcgraph()->machine()->StackSlot(
stack_slot_bytes, kDoubleAlignment));
int offset = 0;
int param_count = static_cast<int>(sig_->parameter_count());
for (int i = 0; i < param_count; ++i) {
wasm::ValueType type = sig_->GetParam(i);
// Start from the parameter with index 1 to drop the instance_node.
// TODO(jkummerow): When a values is a reference type, we should pass it
// in a GC-safe way, not just as a raw pointer.
SetEffect(graph()->NewNode(GetSafeStoreOperator(offset, type), values,
Int32Constant(offset), Param(i + 1), effect(),
control()));
offset += type.element_size_bytes();
}
// The function is passed as the last parameter, after Wasm arguments.
Node* function_node = Param(param_count + 1);
Node* shared = gasm_->Load(
MachineType::AnyTagged(), function_node,
wasm::ObjectAccess::SharedFunctionInfoOffsetInTaggedJSFunction());
Node* sfi_data =
gasm_->Load(MachineType::AnyTagged(), shared,
SharedFunctionInfo::kFunctionDataOffset - kHeapObjectTag);
Node* host_data_foreign =
gasm_->Load(MachineType::AnyTagged(), sfi_data,
WasmCapiFunctionData::kEmbedderDataOffset - kHeapObjectTag);
BuildModifyThreadInWasmFlag(false);
Node* isolate_root = BuildLoadIsolateRoot();
Node* fp_value = graph()->NewNode(mcgraph()->machine()->LoadFramePointer());
STORE_RAW(isolate_root, Isolate::c_entry_fp_offset(), fp_value,
MachineType::PointerRepresentation(), kNoWriteBarrier);
// TODO(jkummerow): Load the address from the {host_data}, and cache
// wrappers per signature.
const ExternalReference ref = ExternalReference::Create(address);
Node* function =
graph()->NewNode(mcgraph()->common()->ExternalConstant(ref));
// Parameters: Address host_data_foreign, Address arguments.
MachineType host_sig_types[] = {
MachineType::Pointer(), MachineType::Pointer(), MachineType::Pointer()};
MachineSignature host_sig(1, 2, host_sig_types);
Node* return_value =
BuildCCall(&host_sig, function, host_data_foreign, values);
BuildModifyThreadInWasmFlag(true);
Node* exception_branch = graph()->NewNode(
mcgraph()->common()->Branch(BranchHint::kTrue),
graph()->NewNode(mcgraph()->machine()->WordEqual(), return_value,
mcgraph()->IntPtrConstant(0)),
control());
SetControl(
graph()->NewNode(mcgraph()->common()->IfFalse(), exception_branch));
WasmThrowDescriptor interface_descriptor;
auto call_descriptor = Linkage::GetStubCallDescriptor(
mcgraph()->zone(), interface_descriptor,
interface_descriptor.GetStackParameterCount(), CallDescriptor::kNoFlags,
Operator::kNoProperties, StubCallMode::kCallWasmRuntimeStub);
Node* call_target = mcgraph()->RelocatableIntPtrConstant(
wasm::WasmCode::kWasmRethrow, RelocInfo::WASM_STUB_CALL);
Node* throw_effect =
graph()->NewNode(mcgraph()->common()->Call(call_descriptor),
call_target, return_value, effect(), control());
TerminateThrow(throw_effect, control());
SetControl(
graph()->NewNode(mcgraph()->common()->IfTrue(), exception_branch));
DCHECK_LT(sig_->return_count(), wasm::kV8MaxWasmFunctionMultiReturns);
size_t return_count = sig_->return_count();
if (return_count == 0) {
Return(Int32Constant(0));
} else {
base::SmallVector<Node*, 8> returns(return_count);
offset = 0;
for (size_t i = 0; i < return_count; ++i) {
wasm::ValueType type = sig_->GetReturn(i);
Node* val = SetEffect(
graph()->NewNode(GetSafeLoadOperator(offset, type), values,
Int32Constant(offset), effect(), control()));
returns[i] = val;
offset += type.element_size_bytes();
}
Return(VectorOf(returns));
}
if (ContainsInt64(sig_)) LowerInt64(kCalledFromWasm);
}
void BuildJSToJSWrapper(Isolate* isolate) {
int wasm_count = static_cast<int>(sig_->parameter_count());
// Build the start and the parameter nodes.
int param_count = 1 /* closure */ + 1 /* receiver */ + wasm_count +
1 /* new.target */ + 1 /* #arg */ + 1 /* context */;
SetEffectControl(Start(param_count));
Node* closure = Param(Linkage::kJSCallClosureParamIndex);
Node* context = Param(Linkage::GetJSCallContextParamIndex(wasm_count + 1));
// Since JS-to-JS wrappers are specific to one Isolate, it is OK to embed
// values (for undefined and root) directly into the instruction stream.
isolate_root_node_ = mcgraph()->IntPtrConstant(isolate->isolate_root());
undefined_value_node_ = graph()->NewNode(mcgraph()->common()->HeapConstant(
isolate->factory()->undefined_value()));
// Throw a TypeError if the signature is incompatible with JavaScript.
if (!wasm::IsJSCompatibleSignature(sig_, module_, enabled_features_)) {
BuildCallToRuntimeWithContext(Runtime::kWasmThrowJSTypeError, context,
nullptr, 0);
TerminateThrow(effect(), control());
return;
}
// Load the original callable from the closure.
Node* shared = LOAD_TAGGED_ANY(
closure,
wasm::ObjectAccess::ToTagged(JSFunction::kSharedFunctionInfoOffset));
Node* func_data = LOAD_TAGGED_ANY(
shared,
wasm::ObjectAccess::ToTagged(SharedFunctionInfo::kFunctionDataOffset));
Node* callable = LOAD_TAGGED_ANY(
func_data,
wasm::ObjectAccess::ToTagged(WasmJSFunctionData::kCallableOffset));
// Call the underlying closure.
base::SmallVector<Node*, 16> args(wasm_count + 7);
int pos = 0;
args[pos++] = GetBuiltinPointerTarget(Builtins::kCall_ReceiverIsAny);
args[pos++] = callable;
args[pos++] = mcgraph()->Int32Constant(wasm_count); // argument count
args[pos++] = BuildLoadUndefinedValueFromInstance(); // receiver
auto call_descriptor = Linkage::GetStubCallDescriptor(
graph()->zone(), CallTrampolineDescriptor{}, wasm_count + 1,
CallDescriptor::kNoFlags, Operator::kNoProperties,
StubCallMode::kCallBuiltinPointer);
// Convert parameter JS values to wasm numbers and back to JS values.
for (int i = 0; i < wasm_count; ++i) {
Node* param = Param(i + 1); // Start from index 1 to skip receiver.
args[pos++] =
ToJS(FromJS(param, context, sig_->GetParam(i)), sig_->GetParam(i));
}
args[pos++] = context;
args[pos++] = effect();
args[pos++] = control();
DCHECK_EQ(pos, args.size());
Node* call = SetEffect(graph()->NewNode(
mcgraph()->common()->Call(call_descriptor), pos, args.begin()));
// Convert return JS values to wasm numbers and back to JS values.
Node* jsval;
if (sig_->return_count() == 0) {
jsval = BuildLoadUndefinedValueFromInstance();
} else if (sig_->return_count() == 1) {
jsval = ToJS(FromJS(call, context, sig_->GetReturn()), sig_->GetReturn());
} else {
Node* fixed_array =
BuildMultiReturnFixedArrayFromIterable(sig_, call, context);
int32_t return_count = static_cast<int32_t>(sig_->return_count());
Node* size =
graph()->NewNode(mcgraph()->common()->NumberConstant(return_count));
jsval = BuildCallAllocateJSArray(size, context);
Node* result_fixed_array = BuildLoadArrayBackingStorage(jsval);
for (unsigned i = 0; i < sig_->return_count(); ++i) {
const auto& type = sig_->GetReturn(i);
Node* elem = LOAD_FIXED_ARRAY_SLOT_ANY(fixed_array, i);
Node* cast = ToJS(FromJS(elem, context, type), type);
STORE_FIXED_ARRAY_SLOT_ANY(result_fixed_array, i, cast);
}
}
Return(jsval);
}
void BuildCWasmEntry() {
// +1 offset for first parameter index being -1.
SetEffectControl(Start(CWasmEntryParameters::kNumParameters + 1));
Node* code_entry = Param(CWasmEntryParameters::kCodeEntry);
Node* object_ref = Param(CWasmEntryParameters::kObjectRef);
Node* arg_buffer = Param(CWasmEntryParameters::kArgumentsBuffer);
Node* c_entry_fp = Param(CWasmEntryParameters::kCEntryFp);
Node* fp_value = graph()->NewNode(mcgraph()->machine()->LoadFramePointer());
STORE_RAW(fp_value, TypedFrameConstants::kFirstPushedFrameValueOffset,
c_entry_fp, MachineType::PointerRepresentation(),
kNoWriteBarrier);
int wasm_arg_count = static_cast<int>(sig_->parameter_count());
base::SmallVector<Node*, 16> args(wasm_arg_count + 4);
int pos = 0;
args[pos++] = code_entry;
args[pos++] = object_ref;
int offset = 0;
for (wasm::ValueType type : sig_->parameters()) {
Node* arg_load = SetEffect(
graph()->NewNode(GetSafeLoadOperator(offset, type), arg_buffer,
Int32Constant(offset), effect(), control()));
args[pos++] = arg_load;
offset += type.element_size_bytes();
}
args[pos++] = effect();
args[pos++] = control();
// Call the wasm code.
auto call_descriptor = GetWasmCallDescriptor(mcgraph()->zone(), sig_);
DCHECK_EQ(pos, args.size());
Node* call = SetEffect(graph()->NewNode(
mcgraph()->common()->Call(call_descriptor), pos, args.begin()));
Node* if_success = graph()->NewNode(mcgraph()->common()->IfSuccess(), call);
Node* if_exception =
graph()->NewNode(mcgraph()->common()->IfException(), call, call);
// Handle exception: return it.
SetControl(if_exception);
Return(if_exception);
// Handle success: store the return value(s).
SetControl(if_success);
pos = 0;
offset = 0;
for (wasm::ValueType type : sig_->returns()) {
Node* value = sig_->return_count() == 1
? call
: graph()->NewNode(mcgraph()->common()->Projection(pos),
call, control());
SetEffect(graph()->NewNode(GetSafeStoreOperator(offset, type), arg_buffer,
Int32Constant(offset), value, effect(),
control()));
offset += type.element_size_bytes();
pos++;
}
Return(mcgraph()->IntPtrConstant(0));
if (mcgraph()->machine()->Is32() && ContainsInt64(sig_)) {
// No special lowering should be requested in the C entry.
DCHECK_NULL(lowering_special_case_);
MachineRepresentation sig_reps[] = {
MachineType::PointerRepresentation(), // return value
MachineType::PointerRepresentation(), // target
MachineRepresentation::kTagged, // object_ref
MachineType::PointerRepresentation(), // argv
MachineType::PointerRepresentation() // c_entry_fp
};
Signature<MachineRepresentation> c_entry_sig(1, 4, sig_reps);
Int64Lowering r(mcgraph()->graph(), mcgraph()->machine(),
mcgraph()->common(), mcgraph()->zone(), &c_entry_sig);
r.LowerGraph();
}
}
private:
const wasm::WasmModule* module_;
StubCallMode stub_mode_;
SetOncePointer<Node> undefined_value_node_;
SetOncePointer<const Operator> int32_to_heapnumber_operator_;
SetOncePointer<const Operator> tagged_non_smi_to_int32_operator_;
SetOncePointer<const Operator> float32_to_number_operator_;
SetOncePointer<const Operator> float64_to_number_operator_;
SetOncePointer<const Operator> tagged_to_float64_operator_;
wasm::WasmFeatures enabled_features_;
CallDescriptor* bigint_to_i64_descriptor_ = nullptr;
CallDescriptor* i64_to_bigint_descriptor_ = nullptr;
};
} // namespace
std::unique_ptr<OptimizedCompilationJob> NewJSToWasmCompilationJob(
Isolate* isolate, wasm::WasmEngine* wasm_engine,
const wasm::FunctionSig* sig, const wasm::WasmModule* module,
bool is_import, const wasm::WasmFeatures& enabled_features) {
//----------------------------------------------------------------------------
// Create the Graph.
//----------------------------------------------------------------------------
std::unique_ptr<Zone> zone = std::make_unique<Zone>(
wasm_engine->allocator(), ZONE_NAME, kCompressGraphZone);
Graph* graph = zone->New<Graph>(zone.get());
CommonOperatorBuilder* common = zone->New<CommonOperatorBuilder>(zone.get());
MachineOperatorBuilder* machine = zone->New<MachineOperatorBuilder>(
zone.get(), MachineType::PointerRepresentation(),
InstructionSelector::SupportedMachineOperatorFlags(),
InstructionSelector::AlignmentRequirements());
MachineGraph* mcgraph = zone->New<MachineGraph>(graph, common, machine);
WasmWrapperGraphBuilder builder(zone.get(), mcgraph, sig, module, nullptr,
StubCallMode::kCallBuiltinPointer,
enabled_features);
builder.BuildJSToWasmWrapper(is_import);
//----------------------------------------------------------------------------
// Create the compilation job.
//----------------------------------------------------------------------------
constexpr size_t kMaxNameLen = 128;
constexpr size_t kNamePrefixLen = 11;
auto name_buffer = std::unique_ptr<char[]>(new char[kMaxNameLen]);
memcpy(name_buffer.get(), "js-to-wasm:", kNamePrefixLen);
PrintSignature(VectorOf(name_buffer.get(), kMaxNameLen) + kNamePrefixLen,
sig);
int params = static_cast<int>(sig->parameter_count());
CallDescriptor* incoming = Linkage::GetJSCallDescriptor(
zone.get(), false, params + 1, CallDescriptor::kNoFlags);
return Pipeline::NewWasmHeapStubCompilationJob(
isolate, wasm_engine, incoming, std::move(zone), graph,
CodeKind::JS_TO_WASM_FUNCTION, std::move(name_buffer),
WasmAssemblerOptions());
}
std::pair<WasmImportCallKind, Handle<JSReceiver>> ResolveWasmImportCall(
Handle<JSReceiver> callable, const wasm::FunctionSig* expected_sig,
const wasm::WasmModule* module,
const wasm::WasmFeatures& enabled_features) {
if (WasmExportedFunction::IsWasmExportedFunction(*callable)) {
auto imported_function = Handle<WasmExportedFunction>::cast(callable);
if (!imported_function->MatchesSignature(module, expected_sig)) {
return std::make_pair(WasmImportCallKind::kLinkError, callable);
}
uint32_t func_index =
static_cast<uint32_t>(imported_function->function_index());
if (func_index >=
imported_function->instance().module()->num_imported_functions) {
return std::make_pair(WasmImportCallKind::kWasmToWasm, callable);
}
Isolate* isolate = callable->GetIsolate();
// Resolve the shortcut to the underlying callable and continue.
Handle<WasmInstanceObject> instance(imported_function->instance(), isolate);
ImportedFunctionEntry entry(instance, func_index);
callable = handle(entry.callable(), isolate);
}
if (WasmJSFunction::IsWasmJSFunction(*callable)) {
auto js_function = Handle<WasmJSFunction>::cast(callable);
if (!js_function->MatchesSignature(expected_sig)) {
return std::make_pair(WasmImportCallKind::kLinkError, callable);
}
Isolate* isolate = callable->GetIsolate();
// Resolve the short-cut to the underlying callable and continue.
callable = handle(js_function->GetCallable(), isolate);
}
if (WasmCapiFunction::IsWasmCapiFunction(*callable)) {
auto capi_function = Handle<WasmCapiFunction>::cast(callable);
if (!capi_function->MatchesSignature(expected_sig)) {
return std::make_pair(WasmImportCallKind::kLinkError, callable);
}
return std::make_pair(WasmImportCallKind::kWasmToCapi, callable);
}
// Assuming we are calling to JS, check whether this would be a runtime error.
if (!wasm::IsJSCompatibleSignature(expected_sig, module, enabled_features)) {
return std::make_pair(WasmImportCallKind::kRuntimeTypeError, callable);
}
// For JavaScript calls, determine whether the target has an arity match.
if (callable->IsJSFunction()) {
Handle<JSFunction> function = Handle<JSFunction>::cast(callable);
Handle<SharedFunctionInfo> shared(function->shared(),
function->GetIsolate());
// Check for math intrinsics.
#define COMPARE_SIG_FOR_BUILTIN(name) \
{ \
const wasm::FunctionSig* sig = \
wasm::WasmOpcodes::Signature(wasm::kExpr##name); \
if (!sig) sig = wasm::WasmOpcodes::AsmjsSignature(wasm::kExpr##name); \
DCHECK_NOT_NULL(sig); \
if (*expected_sig == *sig) { \
return std::make_pair(WasmImportCallKind::k##name, callable); \
} \
}
#define COMPARE_SIG_FOR_BUILTIN_F64(name) \
case Builtins::kMath##name: \
COMPARE_SIG_FOR_BUILTIN(F64##name); \
break;
#define COMPARE_SIG_FOR_BUILTIN_F32_F64(name) \
case Builtins::kMath##name: \
COMPARE_SIG_FOR_BUILTIN(F64##name); \
COMPARE_SIG_FOR_BUILTIN(F32##name); \
break;
if (FLAG_wasm_math_intrinsics && shared->HasBuiltinId()) {
switch (shared->builtin_id()) {
COMPARE_SIG_FOR_BUILTIN_F64(Acos);
COMPARE_SIG_FOR_BUILTIN_F64(Asin);
COMPARE_SIG_FOR_BUILTIN_F64(Atan);
COMPARE_SIG_FOR_BUILTIN_F64(Cos);
COMPARE_SIG_FOR_BUILTIN_F64(Sin);
COMPARE_SIG_FOR_BUILTIN_F64(Tan);
COMPARE_SIG_FOR_BUILTIN_F64(Exp);
COMPARE_SIG_FOR_BUILTIN_F64(Log);
COMPARE_SIG_FOR_BUILTIN_F64(Atan2);
COMPARE_SIG_FOR_BUILTIN_F64(Pow);
COMPARE_SIG_FOR_BUILTIN_F32_F64(Min);
COMPARE_SIG_FOR_BUILTIN_F32_F64(Max);
COMPARE_SIG_FOR_BUILTIN_F32_F64(Abs);
COMPARE_SIG_FOR_BUILTIN_F32_F64(Ceil);
COMPARE_SIG_FOR_BUILTIN_F32_F64(Floor);
COMPARE_SIG_FOR_BUILTIN_F32_F64(Sqrt);
case Builtins::kMathFround:
COMPARE_SIG_FOR_BUILTIN(F32ConvertF64);
break;
default:
break;
}
}
#undef COMPARE_SIG_FOR_BUILTIN
#undef COMPARE_SIG_FOR_BUILTIN_F64
#undef COMPARE_SIG_FOR_BUILTIN_F32_F64
if (IsClassConstructor(shared->kind())) {
// Class constructor will throw anyway.
return std::make_pair(WasmImportCallKind::kUseCallBuiltin, callable);
}
if (shared->internal_formal_parameter_count() ==
expected_sig->parameter_count()) {
return std::make_pair(WasmImportCallKind::kJSFunctionArityMatch,
callable);
}
// If function isn't compiled, compile it now.
IsCompiledScope is_compiled_scope(
shared->is_compiled_scope(callable->GetIsolate()));
if (!is_compiled_scope.is_compiled()) {
Compiler::Compile(function, Compiler::CLEAR_EXCEPTION,
&is_compiled_scope);
}
return std::make_pair(WasmImportCallKind::kJSFunctionArityMismatch,
callable);
}
// Unknown case. Use the call builtin.
return std::make_pair(WasmImportCallKind::kUseCallBuiltin, callable);
}
namespace {
wasm::WasmOpcode GetMathIntrinsicOpcode(WasmImportCallKind kind,
const char** name_ptr) {
#define CASE(name) \
case WasmImportCallKind::k##name: \
*name_ptr = "WasmMathIntrinsic:" #name; \
return wasm::kExpr##name
switch (kind) {
CASE(F64Acos);
CASE(F64Asin);
CASE(F64Atan);
CASE(F64Cos);
CASE(F64Sin);
CASE(F64Tan);
CASE(F64Exp);
CASE(F64Log);
CASE(F64Atan2);
CASE(F64Pow);
CASE(F64Ceil);
CASE(F64Floor);
CASE(F64Sqrt);
CASE(F64Min);
CASE(F64Max);
CASE(F64Abs);
CASE(F32Min);
CASE(F32Max);
CASE(F32Abs);
CASE(F32Ceil);
CASE(F32Floor);
CASE(F32Sqrt);
CASE(F32ConvertF64);
default:
UNREACHABLE();
return wasm::kExprUnreachable;
}
#undef CASE
}
wasm::WasmCompilationResult CompileWasmMathIntrinsic(
wasm::WasmEngine* wasm_engine, WasmImportCallKind kind,
const wasm::FunctionSig* sig) {
DCHECK_EQ(1, sig->return_count());
TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8.wasm.detailed"),
"wasm.CompileWasmMathIntrinsic");
Zone zone(wasm_engine->allocator(), ZONE_NAME, kCompressGraphZone);
// Compile a Wasm function with a single bytecode and let TurboFan
// generate either inlined machine code or a call to a helper.
SourcePositionTable* source_positions = nullptr;
MachineGraph* mcgraph = zone.New<MachineGraph>(
zone.New<Graph>(&zone), zone.New<CommonOperatorBuilder>(&zone),
zone.New<MachineOperatorBuilder>(
&zone, MachineType::PointerRepresentation(),
InstructionSelector::SupportedMachineOperatorFlags(),
InstructionSelector::AlignmentRequirements()));
wasm::CompilationEnv env(
nullptr, wasm::UseTrapHandler::kNoTrapHandler,
wasm::RuntimeExceptionSupport::kNoRuntimeExceptionSupport,
wasm::WasmFeatures::All(), wasm::LowerSimd::kNoLowerSimd);
WasmGraphBuilder builder(&env, mcgraph->zone(), mcgraph, sig,
source_positions);
// Set up the graph start.
Node* start = builder.Start(static_cast<int>(sig->parameter_count() + 1 + 1));
builder.SetEffectControl(start);
builder.set_instance_node(builder.Param(wasm::kWasmInstanceParameterIndex));
// Generate either a unop or a binop.
Node* node = nullptr;
const char* debug_name = "WasmMathIntrinsic";
auto opcode = GetMathIntrinsicOpcode(kind, &debug_name);
switch (sig->parameter_count()) {
case 1:
node = builder.Unop(opcode, builder.Param(1));
break;
case 2:
node = builder.Binop(opcode, builder.Param(1), builder.Param(2));
break;
default:
UNREACHABLE();
}
builder.Return(node);
// Run the compiler pipeline to generate machine code.
auto call_descriptor = GetWasmCallDescriptor(&zone, sig);
if (mcgraph->machine()->Is32()) {
call_descriptor = GetI32WasmCallDescriptor(&zone, call_descriptor);
}
wasm::WasmCompilationResult result = Pipeline::GenerateCodeForWasmNativeStub(
wasm_engine, call_descriptor, mcgraph, CodeKind::WASM_FUNCTION,
wasm::WasmCode::kFunction, debug_name, WasmStubAssemblerOptions(),
source_positions);
return result;
}
} // namespace
wasm::WasmCompilationResult CompileWasmImportCallWrapper(
wasm::WasmEngine* wasm_engine, wasm::CompilationEnv* env,
WasmImportCallKind kind, const wasm::FunctionSig* sig,
bool source_positions, int expected_arity) {
DCHECK_NE(WasmImportCallKind::kLinkError, kind);
DCHECK_NE(WasmImportCallKind::kWasmToWasm, kind);
// Check for math intrinsics first.
if (FLAG_wasm_math_intrinsics &&
kind >= WasmImportCallKind::kFirstMathIntrinsic &&
kind <= WasmImportCallKind::kLastMathIntrinsic) {
return CompileWasmMathIntrinsic(wasm_engine, kind, sig);
}
TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8.wasm.detailed"),
"wasm.CompileWasmImportCallWrapper");
//----------------------------------------------------------------------------
// Create the Graph
//----------------------------------------------------------------------------
Zone zone(wasm_engine->allocator(), ZONE_NAME, kCompressGraphZone);
Graph* graph = zone.New<Graph>(&zone);
CommonOperatorBuilder* common = zone.New<CommonOperatorBuilder>(&zone);
MachineOperatorBuilder* machine = zone.New<MachineOperatorBuilder>(
&zone, MachineType::PointerRepresentation(),
InstructionSelector::SupportedMachineOperatorFlags(),
InstructionSelector::AlignmentRequirements());
MachineGraph* mcgraph = zone.New<MachineGraph>(graph, common, machine);
SourcePositionTable* source_position_table =
source_positions ? zone.New<SourcePositionTable>(graph) : nullptr;
WasmWrapperGraphBuilder builder(
&zone, mcgraph, sig, env->module, source_position_table,
StubCallMode::kCallWasmRuntimeStub, env->enabled_features);
builder.BuildWasmToJSWrapper(kind, expected_arity);
// Build a name in the form "wasm-to-js-<kind>-<signature>".
constexpr size_t kMaxNameLen = 128;
char func_name[kMaxNameLen];
int name_prefix_len = SNPrintF(VectorOf(func_name, kMaxNameLen),
"wasm-to-js-%d-", static_cast<int>(kind));
PrintSignature(VectorOf(func_name, kMaxNameLen) + name_prefix_len, sig, '-');
// Schedule and compile to machine code.
CallDescriptor* incoming =
GetWasmCallDescriptor(&zone, sig, WasmGraphBuilder::kNoRetpoline,
WasmCallKind::kWasmImportWrapper);
if (machine->Is32()) {
incoming = GetI32WasmCallDescriptor(&zone, incoming);
}
wasm::WasmCompilationResult result = Pipeline::GenerateCodeForWasmNativeStub(
wasm_engine, incoming, mcgraph, CodeKind::WASM_TO_JS_FUNCTION,
wasm::WasmCode::kWasmToJsWrapper, func_name, WasmStubAssemblerOptions(),
source_position_table);
result.kind = wasm::WasmCompilationResult::kWasmToJsWrapper;
return result;
}
wasm::WasmCode* CompileWasmCapiCallWrapper(wasm::WasmEngine* wasm_engine,
wasm::NativeModule* native_module,
const wasm::FunctionSig* sig,
Address address) {
TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8.wasm.detailed"),
"wasm.CompileWasmCapiFunction");
Zone zone(wasm_engine->allocator(), ZONE_NAME, kCompressGraphZone);
// TODO(jkummerow): Extract common code into helper method.
SourcePositionTable* source_positions = nullptr;
MachineGraph* mcgraph = zone.New<MachineGraph>(
zone.New<Graph>(&zone), zone.New<CommonOperatorBuilder>(&zone),
zone.New<MachineOperatorBuilder>(
&zone, MachineType::PointerRepresentation(),
InstructionSelector::SupportedMachineOperatorFlags(),
InstructionSelector::AlignmentRequirements()));
WasmWrapperGraphBuilder builder(
&zone, mcgraph, sig, native_module->module(), source_positions,
StubCallMode::kCallWasmRuntimeStub, native_module->enabled_features());
// Set up the graph start.
int param_count = static_cast<int>(sig->parameter_count()) +
1 /* offset for first parameter index being -1 */ +
1 /* Wasm instance */ + 1 /* kExtraCallableParam */;
Node* start = builder.Start(param_count);
builder.SetEffectControl(start);
builder.set_instance_node(builder.Param(wasm::kWasmInstanceParameterIndex));
builder.BuildCapiCallWrapper(address);
// Run the compiler pipeline to generate machine code.
CallDescriptor* call_descriptor =
GetWasmCallDescriptor(&zone, sig, WasmGraphBuilder::kNoRetpoline,
WasmCallKind::kWasmCapiFunction);
if (mcgraph->machine()->Is32()) {
call_descriptor = GetI32WasmCallDescriptor(&zone, call_descriptor);
}
const char* debug_name = "WasmCapiCall";
wasm::WasmCompilationResult result = Pipeline::GenerateCodeForWasmNativeStub(
wasm_engine, call_descriptor, mcgraph, CodeKind::WASM_TO_CAPI_FUNCTION,
wasm::WasmCode::kWasmToCapiWrapper, debug_name,
WasmStubAssemblerOptions(), source_positions);
std::unique_ptr<wasm::WasmCode> wasm_code = native_module->AddCode(
wasm::kAnonymousFuncIndex, result.code_desc, result.frame_slot_count,
result.tagged_parameter_slots,
result.protected_instructions_data.as_vector(),
result.source_positions.as_vector(), wasm::WasmCode::kWasmToCapiWrapper,
wasm::ExecutionTier::kNone, wasm::kNoDebugging);
return native_module->PublishCode(std::move(wasm_code));
}
MaybeHandle<Code> CompileWasmToJSWrapper(Isolate* isolate,
const wasm::FunctionSig* sig,
WasmImportCallKind kind,
int expected_arity) {
std::unique_ptr<Zone> zone = std::make_unique<Zone>(
isolate->allocator(), ZONE_NAME, kCompressGraphZone);
// Create the Graph
Graph* graph = zone->New<Graph>(zone.get());
CommonOperatorBuilder* common = zone->New<CommonOperatorBuilder>(zone.get());
MachineOperatorBuilder* machine = zone->New<MachineOperatorBuilder>(
zone.get(), MachineType::PointerRepresentation(),
InstructionSelector::SupportedMachineOperatorFlags(),
InstructionSelector::AlignmentRequirements());
MachineGraph* mcgraph = zone->New<MachineGraph>(graph, common, machine);
WasmWrapperGraphBuilder builder(zone.get(), mcgraph, sig, nullptr, nullptr,
StubCallMode::kCallWasmRuntimeStub,
wasm::WasmFeatures::FromIsolate(isolate));
builder.BuildWasmToJSWrapper(kind, expected_arity);
// Build a name in the form "wasm-to-js-<kind>-<signature>".
constexpr size_t kMaxNameLen = 128;
constexpr size_t kNamePrefixLen = 11;
auto name_buffer = std::unique_ptr<char[]>(new char[kMaxNameLen]);
memcpy(name_buffer.get(), "wasm-to-js:", kNamePrefixLen);
PrintSignature(VectorOf(name_buffer.get(), kMaxNameLen) + kNamePrefixLen,
sig);
// Generate the call descriptor.
CallDescriptor* incoming =
GetWasmCallDescriptor(zone.get(), sig, WasmGraphBuilder::kNoRetpoline,
WasmCallKind::kWasmImportWrapper);
// Run the compilation job synchronously.
std::unique_ptr<OptimizedCompilationJob> job(
Pipeline::NewWasmHeapStubCompilationJob(
isolate, isolate->wasm_engine(), incoming, std::move(zone), graph,
CodeKind::WASM_TO_JS_FUNCTION, std::move(name_buffer),
AssemblerOptions::Default(isolate)));
// Compile the wrapper
if (job->ExecuteJob(isolate->counters()->runtime_call_stats()) ==
CompilationJob::FAILED ||
job->FinalizeJob(isolate) == CompilationJob::FAILED) {
return Handle<Code>();
}
Handle<Code> code = job->compilation_info()->code();
return code;
}
MaybeHandle<Code> CompileJSToJSWrapper(Isolate* isolate,
const wasm::FunctionSig* sig,
const wasm::WasmModule* module) {
std::unique_ptr<Zone> zone = std::make_unique<Zone>(
isolate->allocator(), ZONE_NAME, kCompressGraphZone);
Graph* graph = zone->New<Graph>(zone.get());
CommonOperatorBuilder* common = zone->New<CommonOperatorBuilder>(zone.get());
MachineOperatorBuilder* machine = zone->New<MachineOperatorBuilder>(
zone.get(), MachineType::PointerRepresentation(),
InstructionSelector::SupportedMachineOperatorFlags(),
InstructionSelector::AlignmentRequirements());
MachineGraph* mcgraph = zone->New<MachineGraph>(graph, common, machine);
WasmWrapperGraphBuilder builder(zone.get(), mcgraph, sig, module, nullptr,
StubCallMode::kCallBuiltinPointer,
wasm::WasmFeatures::FromIsolate(isolate));
builder.BuildJSToJSWrapper(isolate);
int wasm_count = static_cast<int>(sig->parameter_count());
CallDescriptor* incoming = Linkage::GetJSCallDescriptor(
zone.get(), false, wasm_count + 1, CallDescriptor::kNoFlags);
// Build a name in the form "js-to-js:<params>:<returns>".
constexpr size_t kMaxNameLen = 128;
constexpr size_t kNamePrefixLen = 9;
auto name_buffer = std::unique_ptr<char[]>(new char[kMaxNameLen]);
memcpy(name_buffer.get(), "js-to-js:", kNamePrefixLen);
PrintSignature(VectorOf(name_buffer.get(), kMaxNameLen) + kNamePrefixLen,
sig);
// Run the compilation job synchronously.
std::unique_ptr<OptimizedCompilationJob> job(
Pipeline::NewWasmHeapStubCompilationJob(
isolate, isolate->wasm_engine(), incoming, std::move(zone), graph,
CodeKind::JS_TO_JS_FUNCTION, std::move(name_buffer),
AssemblerOptions::Default(isolate)));
if (job->ExecuteJob(isolate->counters()->runtime_call_stats()) ==
CompilationJob::FAILED ||
job->FinalizeJob(isolate) == CompilationJob::FAILED) {
return {};
}
Handle<Code> code = job->compilation_info()->code();
return code;
}
Handle<Code> CompileCWasmEntry(Isolate* isolate, const wasm::FunctionSig* sig,
const wasm::WasmModule* module) {
std::unique_ptr<Zone> zone = std::make_unique<Zone>(
isolate->allocator(), ZONE_NAME, kCompressGraphZone);
Graph* graph = zone->New<Graph>(zone.get());
CommonOperatorBuilder* common = zone->New<CommonOperatorBuilder>(zone.get());
MachineOperatorBuilder* machine = zone->New<MachineOperatorBuilder>(
zone.get(), MachineType::PointerRepresentation(),
InstructionSelector::SupportedMachineOperatorFlags(),
InstructionSelector::AlignmentRequirements());
MachineGraph* mcgraph = zone->New<MachineGraph>(graph, common, machine);
WasmWrapperGraphBuilder builder(zone.get(), mcgraph, sig, module, nullptr,
StubCallMode::kCallBuiltinPointer,
wasm::WasmFeatures::FromIsolate(isolate));
builder.BuildCWasmEntry();
// Schedule and compile to machine code.
MachineType sig_types[] = {MachineType::Pointer(), // return
MachineType::Pointer(), // target
MachineType::AnyTagged(), // object_ref
MachineType::Pointer(), // argv
MachineType::Pointer()}; // c_entry_fp
MachineSignature incoming_sig(1, 4, sig_types);
// Traps need the root register, for TailCallRuntime to call
// Runtime::kThrowWasmError.
CallDescriptor::Flags flags = CallDescriptor::kInitializeRootRegister;
CallDescriptor* incoming =
Linkage::GetSimplifiedCDescriptor(zone.get(), &incoming_sig, flags);
// Build a name in the form "c-wasm-entry:<params>:<returns>".
constexpr size_t kMaxNameLen = 128;
constexpr size_t kNamePrefixLen = 13;
auto name_buffer = std::unique_ptr<char[]>(new char[kMaxNameLen]);
memcpy(name_buffer.get(), "c-wasm-entry:", kNamePrefixLen);
PrintSignature(VectorOf(name_buffer.get(), kMaxNameLen) + kNamePrefixLen,
sig);
// Run the compilation job synchronously.
std::unique_ptr<OptimizedCompilationJob> job(
Pipeline::NewWasmHeapStubCompilationJob(
isolate, isolate->wasm_engine(), incoming, std::move(zone), graph,
CodeKind::C_WASM_ENTRY, std::move(name_buffer),
AssemblerOptions::Default(isolate)));
CHECK_NE(job->ExecuteJob(isolate->counters()->runtime_call_stats(), nullptr),
CompilationJob::FAILED);
CHECK_NE(job->FinalizeJob(isolate), CompilationJob::FAILED);
return job->compilation_info()->code();
}
namespace {
bool BuildGraphForWasmFunction(AccountingAllocator* allocator,
wasm::CompilationEnv* env,
const wasm::FunctionBody& func_body,
int func_index, wasm::WasmFeatures* detected,
MachineGraph* mcgraph,
NodeOriginTable* node_origins,
SourcePositionTable* source_positions) {
// Create a TF graph during decoding.
WasmGraphBuilder builder(env, mcgraph->zone(), mcgraph, func_body.sig,
source_positions);
wasm::VoidResult graph_construction_result =
wasm::BuildTFGraph(allocator, env->enabled_features, env->module,
&builder, detected, func_body, node_origins);
if (graph_construction_result.failed()) {
if (FLAG_trace_wasm_compiler) {
StdoutStream{} << "Compilation failed: "
<< graph_construction_result.error().message()
<< std::endl;
}
return false;
}
// Lower SIMD first, i64x2 nodes will be lowered to int64 nodes, then int64
// lowering will take care of them.
auto sig = CreateMachineSignature(mcgraph->zone(), func_body.sig,
WasmGraphBuilder::kCalledFromWasm);
if (builder.has_simd() &&
(!CpuFeatures::SupportsWasmSimd128() || env->lower_simd)) {
SimdScalarLowering(mcgraph, sig).LowerGraph();
// SimdScalarLowering changes all v128 to 4 i32, so update the machine
// signature for the call to LowerInt64.
size_t return_count = 0;
size_t param_count = 0;
for (auto ret : sig->returns()) {
return_count += ret == MachineRepresentation::kSimd128 ? 4 : 1;
}
for (auto param : sig->parameters()) {
param_count += param == MachineRepresentation::kSimd128 ? 4 : 1;
}
Signature<MachineRepresentation>::Builder sig_builder(
mcgraph->zone(), return_count, param_count);
for (auto ret : sig->returns()) {
if (ret == MachineRepresentation::kSimd128) {
for (int i = 0; i < 4; ++i) {
sig_builder.AddReturn(MachineRepresentation::kWord32);
}
} else {
sig_builder.AddReturn(ret);
}
}
for (auto param : sig->parameters()) {
if (param == MachineRepresentation::kSimd128) {
for (int i = 0; i < 4; ++i) {
sig_builder.AddParam(MachineRepresentation::kWord32);
}
} else {
sig_builder.AddParam(param);
}
}
sig = sig_builder.Build();
}
builder.LowerInt64(sig);
if (func_index >= FLAG_trace_wasm_ast_start &&
func_index < FLAG_trace_wasm_ast_end) {
PrintRawWasmCode(allocator, func_body, env->module, wasm::kPrintLocals);
}
return true;
}
Vector<const char> GetDebugName(Zone* zone, int index) {
// TODO(herhut): Use name from module if available.
constexpr int kBufferLength = 24;
EmbeddedVector<char, kBufferLength> name_vector;
int name_len = SNPrintF(name_vector, "wasm-function#%d", index);
DCHECK(name_len > 0 && name_len < name_vector.length());
char* index_name = zone->NewArray<char>(name_len);
memcpy(index_name, name_vector.begin(), name_len);
return Vector<const char>(index_name, name_len);
}
} // namespace
wasm::WasmCompilationResult ExecuteTurbofanWasmCompilation(
wasm::WasmEngine* wasm_engine, wasm::CompilationEnv* env,
const wasm::FunctionBody& func_body, int func_index, Counters* counters,
wasm::WasmFeatures* detected) {
TRACE_EVENT2(TRACE_DISABLED_BY_DEFAULT("v8.wasm.detailed"),
"wasm.CompileTopTier", "func_index", func_index, "body_size",
func_body.end - func_body.start);
Zone zone(wasm_engine->allocator(), ZONE_NAME, kCompressGraphZone);
MachineGraph* mcgraph = zone.New<MachineGraph>(
zone.New<Graph>(&zone), zone.New<CommonOperatorBuilder>(&zone),
zone.New<MachineOperatorBuilder>(
&zone, MachineType::PointerRepresentation(),
InstructionSelector::SupportedMachineOperatorFlags(),
InstructionSelector::AlignmentRequirements()));
OptimizedCompilationInfo info(GetDebugName(&zone, func_index), &zone,
CodeKind::WASM_FUNCTION);
if (env->runtime_exception_support) {
info.set_wasm_runtime_exception_support();
}
#if !defined(DISABLE_GRAPHS_STARBOARD)
if (info.trace_turbo_json()) {
TurboCfgFile tcf;
tcf << AsC1VCompilation(&info);
}
#endif // DISABLE_GRAPHS_STARBOARD
NodeOriginTable* node_origins =
info.trace_turbo_json() ? zone.New<NodeOriginTable>(mcgraph->graph())
: nullptr;
SourcePositionTable* source_positions =
mcgraph->zone()->New<SourcePositionTable>(mcgraph->graph());
if (!BuildGraphForWasmFunction(wasm_engine->allocator(), env, func_body,
func_index, detected, mcgraph, node_origins,
source_positions)) {
return wasm::WasmCompilationResult{};
}
if (node_origins) {
node_origins->AddDecorator();
}
// Run the compiler pipeline to generate machine code.
auto call_descriptor = GetWasmCallDescriptor(&zone, func_body.sig);
if (mcgraph->machine()->Is32()) {
call_descriptor = GetI32WasmCallDescriptor(&zone, call_descriptor);
}
if (ContainsSimd(func_body.sig) &&
(!CpuFeatures::SupportsWasmSimd128() || env->lower_simd)) {
call_descriptor = GetI32WasmCallDescriptorForSimd(&zone, call_descriptor);
}
Pipeline::GenerateCodeForWasmFunction(
&info, wasm_engine, mcgraph, call_descriptor, source_positions,
node_origins, func_body, env->module, func_index);
if (counters) {
counters->wasm_compile_function_peak_memory_bytes()->AddSample(
static_cast<int>(mcgraph->graph()->zone()->allocation_size()));
}
auto result = info.ReleaseWasmCompilationResult();
CHECK_NOT_NULL(result); // Compilation expected to succeed.
DCHECK_EQ(wasm::ExecutionTier::kTurbofan, result->result_tier);
return std::move(*result);
}
namespace {
// Helper for allocating either an GP or FP reg, or the next stack slot.
class LinkageLocationAllocator {
public:
template <size_t kNumGpRegs, size_t kNumFpRegs>
constexpr LinkageLocationAllocator(const Register (&gp)[kNumGpRegs],
const DoubleRegister (&fp)[kNumFpRegs])
: allocator_(wasm::LinkageAllocator(gp, fp)) {}
LinkageLocation Next(MachineRepresentation rep) {
MachineType type = MachineType::TypeForRepresentation(rep);
if (IsFloatingPoint(rep)) {
if (allocator_.CanAllocateFP(rep)) {
int reg_code = allocator_.NextFpReg(rep);
return LinkageLocation::ForRegister(reg_code, type);
}
} else if (allocator_.CanAllocateGP()) {
int reg_code = allocator_.NextGpReg();
return LinkageLocation::ForRegister(reg_code, type);
}
// Cannot use register; use stack slot.
int index = -1 - allocator_.NextStackSlot(rep);
return LinkageLocation::ForCallerFrameSlot(index, type);
}
void SetStackOffset(int offset) { allocator_.SetStackOffset(offset); }
int NumStackSlots() const { return allocator_.NumStackSlots(); }
private:
wasm::LinkageAllocator allocator_;
};
} // namespace
// General code uses the above configuration data.
CallDescriptor* GetWasmCallDescriptor(
Zone* zone, const wasm::FunctionSig* fsig,
WasmGraphBuilder::UseRetpoline use_retpoline, WasmCallKind call_kind) {
// The extra here is to accomodate the instance object as first parameter
// and, when specified, the additional callable.
bool extra_callable_param =
call_kind == kWasmImportWrapper || call_kind == kWasmCapiFunction;
int extra_params = extra_callable_param ? 2 : 1;
LocationSignature::Builder locations(zone, fsig->return_count(),
fsig->parameter_count() + extra_params);
// Add register and/or stack parameter(s).
LinkageLocationAllocator params(wasm::kGpParamRegisters,
wasm::kFpParamRegisters);
// The instance object.
locations.AddParam(params.Next(MachineRepresentation::kTaggedPointer));
const size_t param_offset = 1; // Actual params start here.
// Parameters are separated into two groups (first all untagged, then all
// tagged parameters). This allows for easy iteration of tagged parameters
// during frame iteration.
const size_t parameter_count = fsig->parameter_count();
for (size_t i = 0; i < parameter_count; i++) {
MachineRepresentation param = fsig->GetParam(i).machine_representation();
// Skip tagged parameters (e.g. any-ref).
if (IsAnyTagged(param)) continue;
auto l = params.Next(param);
locations.AddParamAt(i + param_offset, l);
}
for (size_t i = 0; i < parameter_count; i++) {
MachineRepresentation param = fsig->GetParam(i).machine_representation();
// Skip untagged parameters.
if (!IsAnyTagged(param)) continue;
auto l = params.Next(param);
locations.AddParamAt(i + param_offset, l);
}
// Import call wrappers have an additional (implicit) parameter, the callable.
// For consistency with JS, we use the JSFunction register.
if (extra_callable_param) {
locations.AddParam(LinkageLocation::ForRegister(
kJSFunctionRegister.code(), MachineType::TaggedPointer()));
}
// Add return location(s).
LinkageLocationAllocator rets(wasm::kGpReturnRegisters,
wasm::kFpReturnRegisters);
int parameter_slots = params.NumStackSlots();
if (ShouldPadArguments(parameter_slots)) parameter_slots++;
rets.SetStackOffset(parameter_slots);
const int return_count = static_cast<int>(locations.return_count_);
for (int i = 0; i < return_count; i++) {
MachineRepresentation ret = fsig->GetReturn(i).machine_representation();
auto l = rets.Next(ret);
locations.AddReturn(l);
}
const RegList kCalleeSaveRegisters = 0;
const RegList kCalleeSaveFPRegisters = 0;
// The target for wasm calls is always a code object.
MachineType target_type = MachineType::Pointer();
LinkageLocation target_loc = LinkageLocation::ForAnyRegister(target_type);
CallDescriptor::Kind descriptor_kind;
if (call_kind == kWasmFunction) {
descriptor_kind = CallDescriptor::kCallWasmFunction;
} else if (call_kind == kWasmImportWrapper) {
descriptor_kind = CallDescriptor::kCallWasmImportWrapper;
} else {
DCHECK_EQ(call_kind, kWasmCapiFunction);
descriptor_kind = CallDescriptor::kCallWasmCapiFunction;
}
CallDescriptor::Flags flags =
use_retpoline ? CallDescriptor::kRetpoline : CallDescriptor::kNoFlags;
return zone->New<CallDescriptor>( // --
descriptor_kind, // kind
target_type, // target MachineType
target_loc, // target location
locations.Build(), // location_sig
parameter_slots, // stack_parameter_count
compiler::Operator::kNoProperties, // properties
kCalleeSaveRegisters, // callee-saved registers
kCalleeSaveFPRegisters, // callee-saved fp regs
flags, // flags
"wasm-call", // debug name
StackArgumentOrder::kDefault, // order of the arguments in the stack
0, // allocatable registers
rets.NumStackSlots() - parameter_slots); // stack_return_count
}
namespace {
CallDescriptor* ReplaceTypeInCallDescriptorWith(
Zone* zone, const CallDescriptor* call_descriptor, size_t num_replacements,
MachineType input_type, MachineRepresentation output_type) {
size_t parameter_count = call_descriptor->ParameterCount();
size_t return_count = call_descriptor->ReturnCount();
for (size_t i = 0; i < call_descriptor->ParameterCount(); i++) {
if (call_descriptor->GetParameterType(i) == input_type) {
parameter_count += num_replacements - 1;
}
}
for (size_t i = 0; i < call_descriptor->ReturnCount(); i++) {
if (call_descriptor->GetReturnType(i) == input_type) {
return_count += num_replacements - 1;
}
}
if (parameter_count == call_descriptor->ParameterCount() &&
return_count == call_descriptor->ReturnCount()) {
return const_cast<CallDescriptor*>(call_descriptor);
}
LocationSignature::Builder locations(zone, return_count, parameter_count);
// The last parameter may be the special callable parameter. In that case we
// have to preserve it as the last parameter, i.e. we allocate it in the new
// location signature again in the same register.
bool has_callable_param =
(call_descriptor->GetInputLocation(call_descriptor->InputCount() - 1) ==
LinkageLocation::ForRegister(kJSFunctionRegister.code(),
MachineType::TaggedPointer()));
LinkageLocationAllocator params(wasm::kGpParamRegisters,
wasm::kFpParamRegisters);
for (size_t i = 0, e = call_descriptor->ParameterCount() -
(has_callable_param ? 1 : 0);
i < e; i++) {
if (call_descriptor->GetParameterType(i) == input_type) {
for (size_t j = 0; j < num_replacements; j++) {
locations.AddParam(params.Next(output_type));
}
} else {
locations.AddParam(
params.Next(call_descriptor->GetParameterType(i).representation()));
}
}
if (has_callable_param) {
locations.AddParam(LinkageLocation::ForRegister(
kJSFunctionRegister.code(), MachineType::TaggedPointer()));
}
LinkageLocationAllocator rets(wasm::kGpReturnRegisters,
wasm::kFpReturnRegisters);
rets.SetStackOffset(params.NumStackSlots());
for (size_t i = 0; i < call_descriptor->ReturnCount(); i++) {
if (call_descriptor->GetReturnType(i) == input_type) {
for (size_t j = 0; j < num_replacements; j++) {
locations.AddReturn(rets.Next(output_type));
}
} else {
locations.AddReturn(
rets.Next(call_descriptor->GetReturnType(i).representation()));
}
}
return zone->New<CallDescriptor>( // --
call_descriptor->kind(), // kind
call_descriptor->GetInputType(0), // target MachineType
call_descriptor->GetInputLocation(0), // target location
locations.Build(), // location_sig
params.NumStackSlots(), // stack_parameter_count
call_descriptor->properties(), // properties
call_descriptor->CalleeSavedRegisters(), // callee-saved registers
call_descriptor->CalleeSavedFPRegisters(), // callee-saved fp regs
call_descriptor->flags(), // flags
call_descriptor->debug_name(), // debug name
call_descriptor->GetStackArgumentOrder(), // stack order
call_descriptor->AllocatableRegisters(), // allocatable registers
rets.NumStackSlots() - params.NumStackSlots()); // stack_return_count
}
} // namespace
CallDescriptor* GetI32WasmCallDescriptor(
Zone* zone, const CallDescriptor* call_descriptor) {
return ReplaceTypeInCallDescriptorWith(zone, call_descriptor, 2,
MachineType::Int64(),
MachineRepresentation::kWord32);
}
CallDescriptor* GetI32WasmCallDescriptorForSimd(
Zone* zone, CallDescriptor* call_descriptor) {
return ReplaceTypeInCallDescriptorWith(zone, call_descriptor, 4,
MachineType::Simd128(),
MachineRepresentation::kWord32);
}
AssemblerOptions WasmAssemblerOptions() {
AssemblerOptions options;
// Relocation info required to serialize {WasmCode} for proper functions.
options.record_reloc_info_for_serialization = true;
options.enable_root_array_delta_access = false;
return options;
}
AssemblerOptions WasmStubAssemblerOptions() {
AssemblerOptions options;
// Relocation info not necessary because stubs are not serialized.
options.record_reloc_info_for_serialization = false;
options.enable_root_array_delta_access = false;
return options;
}
#undef FATAL_UNSUPPORTED_OPCODE
#undef CALL_BUILTIN
#undef WASM_INSTANCE_OBJECT_SIZE
#undef WASM_INSTANCE_OBJECT_OFFSET
#undef LOAD_INSTANCE_FIELD
#undef LOAD_TAGGED_POINTER
#undef LOAD_TAGGED_ANY
#undef LOAD_FIXED_ARRAY_SLOT
#undef LOAD_FIXED_ARRAY_SLOT_SMI
#undef LOAD_FIXED_ARRAY_SLOT_PTR
#undef LOAD_FIXED_ARRAY_SLOT_ANY
#undef STORE_RAW
#undef STORE_RAW_NODE_OFFSET
#undef STORE_FIXED_ARRAY_SLOT_SMI
#undef STORE_FIXED_ARRAY_SLOT_ANY
} // namespace compiler
} // namespace internal
} // namespace v8