| // 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. |
| |
| #ifndef V8_COMPILER_FRAME_STATES_H_ |
| #define V8_COMPILER_FRAME_STATES_H_ |
| |
| #include "src/builtins/builtins.h" |
| #include "src/handles.h" |
| #include "src/objects/shared-function-info.h" |
| #include "src/utils.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| namespace compiler { |
| |
| class JSGraph; |
| class Node; |
| |
| // Flag that describes how to combine the current environment with |
| // the output of a node to obtain a framestate for lazy bailout. |
| class OutputFrameStateCombine { |
| public: |
| static const size_t kInvalidIndex = SIZE_MAX; |
| |
| static OutputFrameStateCombine Ignore() { |
| return OutputFrameStateCombine(kInvalidIndex); |
| } |
| static OutputFrameStateCombine PokeAt(size_t index) { |
| return OutputFrameStateCombine(index); |
| } |
| |
| size_t GetOffsetToPokeAt() const { |
| DCHECK_NE(parameter_, kInvalidIndex); |
| return parameter_; |
| } |
| |
| bool IsOutputIgnored() const { return parameter_ == kInvalidIndex; } |
| |
| size_t ConsumedOutputCount() const { return IsOutputIgnored() ? 0 : 1; } |
| |
| bool operator==(OutputFrameStateCombine const& other) const { |
| return parameter_ == other.parameter_; |
| } |
| bool operator!=(OutputFrameStateCombine const& other) const { |
| return !(*this == other); |
| } |
| |
| friend size_t hash_value(OutputFrameStateCombine const&); |
| friend std::ostream& operator<<(std::ostream&, |
| OutputFrameStateCombine const&); |
| |
| private: |
| explicit OutputFrameStateCombine(size_t parameter) : parameter_(parameter) {} |
| |
| size_t const parameter_; |
| }; |
| |
| |
| // The type of stack frame that a FrameState node represents. |
| enum class FrameStateType { |
| kInterpretedFunction, // Represents an InterpretedFrame. |
| kArgumentsAdaptor, // Represents an ArgumentsAdaptorFrame. |
| kConstructStub, // Represents a ConstructStubFrame. |
| kBuiltinContinuation, // Represents a continuation to a stub. |
| kJavaScriptBuiltinContinuation // Represents a continuation to a JavaScipt |
| // builtin. |
| }; |
| |
| class FrameStateFunctionInfo { |
| public: |
| FrameStateFunctionInfo(FrameStateType type, int parameter_count, |
| int local_count, |
| Handle<SharedFunctionInfo> shared_info) |
| : type_(type), |
| parameter_count_(parameter_count), |
| local_count_(local_count), |
| shared_info_(shared_info) {} |
| |
| int local_count() const { return local_count_; } |
| int parameter_count() const { return parameter_count_; } |
| Handle<SharedFunctionInfo> shared_info() const { return shared_info_; } |
| FrameStateType type() const { return type_; } |
| |
| static bool IsJSFunctionType(FrameStateType type) { |
| return type == FrameStateType::kInterpretedFunction || |
| type == FrameStateType::kJavaScriptBuiltinContinuation; |
| } |
| |
| private: |
| FrameStateType const type_; |
| int const parameter_count_; |
| int const local_count_; |
| Handle<SharedFunctionInfo> const shared_info_; |
| }; |
| |
| |
| class FrameStateInfo final { |
| public: |
| FrameStateInfo(BailoutId bailout_id, OutputFrameStateCombine state_combine, |
| const FrameStateFunctionInfo* info) |
| : bailout_id_(bailout_id), |
| frame_state_combine_(state_combine), |
| info_(info) {} |
| |
| FrameStateType type() const { |
| return info_ == nullptr ? FrameStateType::kInterpretedFunction |
| : info_->type(); |
| } |
| BailoutId bailout_id() const { return bailout_id_; } |
| OutputFrameStateCombine state_combine() const { return frame_state_combine_; } |
| MaybeHandle<SharedFunctionInfo> shared_info() const { |
| return info_ == nullptr ? MaybeHandle<SharedFunctionInfo>() |
| : info_->shared_info(); |
| } |
| int parameter_count() const { |
| return info_ == nullptr ? 0 : info_->parameter_count(); |
| } |
| int local_count() const { |
| return info_ == nullptr ? 0 : info_->local_count(); |
| } |
| const FrameStateFunctionInfo* function_info() const { return info_; } |
| |
| private: |
| BailoutId const bailout_id_; |
| OutputFrameStateCombine const frame_state_combine_; |
| const FrameStateFunctionInfo* const info_; |
| }; |
| |
| bool operator==(FrameStateInfo const&, FrameStateInfo const&); |
| bool operator!=(FrameStateInfo const&, FrameStateInfo const&); |
| |
| size_t hash_value(FrameStateInfo const&); |
| |
| std::ostream& operator<<(std::ostream&, FrameStateInfo const&); |
| |
| static const int kFrameStateParametersInput = 0; |
| static const int kFrameStateLocalsInput = 1; |
| static const int kFrameStateStackInput = 2; |
| static const int kFrameStateContextInput = 3; |
| static const int kFrameStateFunctionInput = 4; |
| static const int kFrameStateOuterStateInput = 5; |
| static const int kFrameStateInputCount = kFrameStateOuterStateInput + 1; |
| |
| enum class ContinuationFrameStateMode { EAGER, LAZY }; |
| |
| Node* CreateStubBuiltinContinuationFrameState(JSGraph* graph, |
| Builtins::Name name, |
| Node* context, Node** parameters, |
| int parameter_count, |
| Node* outer_frame_state, |
| ContinuationFrameStateMode mode); |
| |
| Node* CreateJavaScriptBuiltinContinuationFrameState( |
| JSGraph* graph, Handle<JSFunction> function, Builtins::Name name, |
| Node* target, Node* context, Node** stack_parameters, |
| int stack_parameter_count, Node* outer_frame_state, |
| ContinuationFrameStateMode mode); |
| |
| } // namespace compiler |
| } // namespace internal |
| } // namespace v8 |
| |
| #endif // V8_COMPILER_FRAME_STATES_H_ |