blob: 438d10ab59f67c1de2808c64923a165887968a0f [file] [log] [blame]
// Copyright 2017 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/code-stub-assembler.h"
namespace v8 {
namespace internal {
typedef compiler::Node Node;
typedef compiler::CodeAssemblerState CodeAssemblerState;
typedef compiler::CodeAssemblerLabel CodeAssemblerLabel;
class ArgumentsBuiltinsAssembler : public CodeStubAssembler {
explicit ArgumentsBuiltinsAssembler(CodeAssemblerState* state)
: CodeStubAssembler(state) {}
Node* EmitFastNewStrictArguments(Node* context, Node* function);
Node* EmitFastNewSloppyArguments(Node* context, Node* function);
Node* EmitFastNewRestParameter(Node* context, Node* function);
// Calculates and returns the the frame pointer, argument count and formal
// parameter count to be used to access a function's parameters, taking
// argument adapter frames into account. The tuple is of the form:
// <frame_ptr, # parameters actually passed, formal parameter count>
std::tuple<Node*, Node*, Node*> GetArgumentsFrameAndCount(Node* function,
ParameterMode mode);
// Allocates an an arguments (either rest, strict or sloppy) together with the
// FixedArray elements for the arguments and a parameter map (for sloppy
// arguments only). A tuple is returned with pointers to the arguments object,
// the elements and parameter map in the form:
// <argument object, arguments FixedArray, parameter map or nullptr>
std::tuple<Node*, Node*, Node*> AllocateArgumentsObject(
Node* map, Node* arguments, Node* mapped_arguments,
ParameterMode param_mode, int base_size);
// For Rest parameters and Strict arguments, the copying of parameters from
// the stack into the arguments object is straight-forward and shares much of
// the same underlying logic, which is encapsulated by this function. It
// allocates an arguments-like object of size |base_size| with the map |map|,
// and then copies |rest_count| arguments from the stack frame pointed to by
// |frame_ptr| starting from |first_arg|. |arg_count| == |first_arg| +
// |rest_count|.
Node* ConstructParametersObjectFromArgs(Node* map, Node* frame_ptr,
Node* arg_count, Node* first_arg,
Node* rest_count,
ParameterMode param_mode,
int base_size);
} // namespace internal
} // namespace v8