| // Copyright 2013 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_COMMON_OPERATOR_H_ |
| #define V8_COMPILER_COMMON_OPERATOR_H_ |
| |
| #include "src/compiler/machine-type.h" |
| #include "src/unique.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| // Forward declarations. |
| class ExternalReference; |
| |
| |
| namespace compiler { |
| |
| // Forward declarations. |
| class CallDescriptor; |
| struct CommonOperatorGlobalCache; |
| class Operator; |
| |
| |
| // Prediction hint for branches. |
| enum class BranchHint : uint8_t { kNone, kTrue, kFalse }; |
| |
| inline size_t hash_value(BranchHint hint) { return static_cast<size_t>(hint); } |
| |
| std::ostream& operator<<(std::ostream&, BranchHint); |
| |
| BranchHint BranchHintOf(const Operator* const); |
| |
| |
| class SelectParameters FINAL { |
| public: |
| explicit SelectParameters(MachineType type, |
| BranchHint hint = BranchHint::kNone) |
| : type_(type), hint_(hint) {} |
| |
| MachineType type() const { return type_; } |
| BranchHint hint() const { return hint_; } |
| |
| private: |
| const MachineType type_; |
| const BranchHint hint_; |
| }; |
| |
| bool operator==(SelectParameters const&, SelectParameters const&); |
| bool operator!=(SelectParameters const&, SelectParameters const&); |
| |
| size_t hash_value(SelectParameters const& p); |
| |
| std::ostream& operator<<(std::ostream&, SelectParameters const& p); |
| |
| SelectParameters const& SelectParametersOf(const Operator* const); |
| |
| |
| // 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: |
| enum Kind { |
| kPushOutput, // Push the output on the expression stack. |
| kPokeAt // Poke at the given environment location, |
| // counting from the top of the stack. |
| }; |
| |
| static OutputFrameStateCombine Ignore() { |
| return OutputFrameStateCombine(kPushOutput, 0); |
| } |
| static OutputFrameStateCombine Push(size_t count = 1) { |
| return OutputFrameStateCombine(kPushOutput, count); |
| } |
| static OutputFrameStateCombine PokeAt(size_t index) { |
| return OutputFrameStateCombine(kPokeAt, index); |
| } |
| |
| Kind kind() const { return kind_; } |
| size_t GetPushCount() const { |
| DCHECK_EQ(kPushOutput, kind()); |
| return parameter_; |
| } |
| size_t GetOffsetToPokeAt() const { |
| DCHECK_EQ(kPokeAt, kind()); |
| return parameter_; |
| } |
| |
| bool IsOutputIgnored() const { |
| return kind_ == kPushOutput && parameter_ == 0; |
| } |
| |
| size_t ConsumedOutputCount() const { |
| return kind_ == kPushOutput ? GetPushCount() : 1; |
| } |
| |
| bool operator==(OutputFrameStateCombine const& other) const { |
| return kind_ == other.kind_ && 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: |
| OutputFrameStateCombine(Kind kind, size_t parameter) |
| : kind_(kind), parameter_(parameter) {} |
| |
| Kind const kind_; |
| size_t const parameter_; |
| }; |
| |
| |
| // The type of stack frame that a FrameState node represents. |
| enum FrameStateType { |
| JS_FRAME, // Represents an unoptimized JavaScriptFrame. |
| ARGUMENTS_ADAPTOR // Represents an ArgumentsAdaptorFrame. |
| }; |
| |
| |
| class FrameStateCallInfo FINAL { |
| public: |
| FrameStateCallInfo( |
| FrameStateType type, BailoutId bailout_id, |
| OutputFrameStateCombine state_combine, |
| MaybeHandle<JSFunction> jsfunction = MaybeHandle<JSFunction>()) |
| : type_(type), |
| bailout_id_(bailout_id), |
| frame_state_combine_(state_combine), |
| jsfunction_(jsfunction) {} |
| |
| FrameStateType type() const { return type_; } |
| BailoutId bailout_id() const { return bailout_id_; } |
| OutputFrameStateCombine state_combine() const { return frame_state_combine_; } |
| MaybeHandle<JSFunction> jsfunction() const { return jsfunction_; } |
| |
| private: |
| FrameStateType type_; |
| BailoutId bailout_id_; |
| OutputFrameStateCombine frame_state_combine_; |
| MaybeHandle<JSFunction> jsfunction_; |
| }; |
| |
| bool operator==(FrameStateCallInfo const&, FrameStateCallInfo const&); |
| bool operator!=(FrameStateCallInfo const&, FrameStateCallInfo const&); |
| |
| size_t hash_value(FrameStateCallInfo const&); |
| |
| std::ostream& operator<<(std::ostream&, FrameStateCallInfo const&); |
| |
| |
| // Interface for building common operators that can be used at any level of IR, |
| // including JavaScript, mid-level, and low-level. |
| class CommonOperatorBuilder FINAL : public ZoneObject { |
| public: |
| explicit CommonOperatorBuilder(Zone* zone); |
| |
| const Operator* Dead(); |
| const Operator* End(); |
| const Operator* Branch(BranchHint = BranchHint::kNone); |
| const Operator* IfTrue(); |
| const Operator* IfFalse(); |
| const Operator* Throw(); |
| const Operator* Terminate(int effects); |
| const Operator* Return(); |
| |
| const Operator* Start(int num_formal_parameters); |
| const Operator* Loop(int control_input_count); |
| const Operator* Merge(int control_input_count); |
| const Operator* Parameter(int index); |
| |
| const Operator* Int32Constant(int32_t); |
| const Operator* Int64Constant(int64_t); |
| const Operator* Float32Constant(volatile float); |
| const Operator* Float64Constant(volatile double); |
| const Operator* ExternalConstant(const ExternalReference&); |
| const Operator* NumberConstant(volatile double); |
| const Operator* HeapConstant(const Unique<HeapObject>&); |
| |
| const Operator* Select(MachineType, BranchHint = BranchHint::kNone); |
| const Operator* Phi(MachineType type, int arguments); |
| const Operator* EffectPhi(int arguments); |
| const Operator* ValueEffect(int arguments); |
| const Operator* Finish(int arguments); |
| const Operator* StateValues(int arguments); |
| const Operator* FrameState( |
| FrameStateType type, BailoutId bailout_id, |
| OutputFrameStateCombine state_combine, |
| MaybeHandle<JSFunction> jsfunction = MaybeHandle<JSFunction>()); |
| const Operator* Call(const CallDescriptor* descriptor); |
| const Operator* Projection(size_t index); |
| |
| private: |
| Zone* zone() const { return zone_; } |
| |
| const CommonOperatorGlobalCache& cache_; |
| Zone* const zone_; |
| |
| DISALLOW_COPY_AND_ASSIGN(CommonOperatorBuilder); |
| }; |
| |
| } // namespace compiler |
| } // namespace internal |
| } // namespace v8 |
| |
| #endif // V8_COMPILER_COMMON_OPERATOR_H_ |