| // Copyright 2014 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_INT64_LOWERING_H_ |
| #define V8_COMPILER_INT64_LOWERING_H_ |
| |
| #include "src/common/globals.h" |
| #include "src/compiler/common-operator.h" |
| #include "src/compiler/graph.h" |
| #include "src/compiler/machine-operator.h" |
| #include "src/compiler/node-marker.h" |
| #include "src/zone/zone-containers.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| template <typename T> |
| class Signature; |
| |
| namespace compiler { |
| |
| // Struct for CallDescriptors that need special lowering. |
| struct V8_EXPORT_PRIVATE Int64LoweringSpecialCase { |
| Int64LoweringSpecialCase() |
| : bigint_to_i64_call_descriptor(nullptr), |
| i64_to_bigint_call_descriptor(nullptr), |
| bigint_to_i32_pair_call_descriptor(nullptr), |
| i32_pair_to_bigint_call_descriptor(nullptr) {} |
| |
| // CallDescriptors that need special lowering. |
| CallDescriptor* bigint_to_i64_call_descriptor; |
| CallDescriptor* i64_to_bigint_call_descriptor; |
| |
| // The replacement CallDescriptors. |
| CallDescriptor* bigint_to_i32_pair_call_descriptor; |
| CallDescriptor* i32_pair_to_bigint_call_descriptor; |
| }; |
| |
| class V8_EXPORT_PRIVATE Int64Lowering { |
| public: |
| Int64Lowering( |
| Graph* graph, MachineOperatorBuilder* machine, |
| CommonOperatorBuilder* common, Zone* zone, |
| Signature<MachineRepresentation>* signature, |
| std::unique_ptr<Int64LoweringSpecialCase> special_case = nullptr); |
| |
| void LowerGraph(); |
| |
| static int GetParameterCountAfterLowering( |
| Signature<MachineRepresentation>* signature); |
| |
| private: |
| enum class State : uint8_t { kUnvisited, kOnStack, kVisited }; |
| |
| struct Replacement { |
| Node* low; |
| Node* high; |
| }; |
| |
| Zone* zone() const { return zone_; } |
| Graph* graph() const { return graph_; } |
| MachineOperatorBuilder* machine() const { return machine_; } |
| CommonOperatorBuilder* common() const { return common_; } |
| Signature<MachineRepresentation>* signature() const { return signature_; } |
| |
| void PushNode(Node* node); |
| void LowerNode(Node* node); |
| bool DefaultLowering(Node* node, bool low_word_only = false); |
| void LowerComparison(Node* node, const Operator* signed_op, |
| const Operator* unsigned_op); |
| void LowerWord64AtomicBinop(Node* node, const Operator* op); |
| void LowerWord64AtomicNarrowOp(Node* node, const Operator* op); |
| |
| CallDescriptor* LowerCallDescriptor(const CallDescriptor* call_descriptor); |
| |
| void ReplaceNode(Node* old, Node* new_low, Node* new_high); |
| bool HasReplacementLow(Node* node); |
| Node* GetReplacementLow(Node* node); |
| bool HasReplacementHigh(Node* node); |
| Node* GetReplacementHigh(Node* node); |
| void PreparePhiReplacement(Node* phi); |
| void GetIndexNodes(Node* index, Node** index_low, Node** index_high); |
| void ReplaceNodeWithProjections(Node* node); |
| void LowerMemoryBaseAndIndex(Node* node); |
| |
| struct NodeState { |
| Node* node; |
| int input_index; |
| }; |
| |
| Zone* zone_; |
| Graph* const graph_; |
| MachineOperatorBuilder* machine_; |
| CommonOperatorBuilder* common_; |
| NodeMarker<State> state_; |
| ZoneDeque<NodeState> stack_; |
| Replacement* replacements_; |
| Signature<MachineRepresentation>* signature_; |
| Node* placeholder_; |
| std::unique_ptr<Int64LoweringSpecialCase> special_case_; |
| }; |
| |
| } // namespace compiler |
| } // namespace internal |
| } // namespace v8 |
| |
| #endif // V8_COMPILER_INT64_LOWERING_H_ |