Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 1 | // Copyright 2014 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #ifndef V8_COMPILER_INT64_REDUCER_H_ |
| 6 | #define V8_COMPILER_INT64_REDUCER_H_ |
| 7 | |
| 8 | #include "src/compiler/common-operator.h" |
| 9 | #include "src/compiler/graph.h" |
| 10 | #include "src/compiler/machine-operator.h" |
| 11 | #include "src/compiler/node-marker.h" |
| 12 | #include "src/zone-containers.h" |
| 13 | |
| 14 | namespace v8 { |
| 15 | namespace internal { |
| 16 | namespace compiler { |
| 17 | |
| 18 | class Int64Lowering { |
| 19 | public: |
| 20 | Int64Lowering(Graph* graph, MachineOperatorBuilder* machine, |
| 21 | CommonOperatorBuilder* common, Zone* zone, |
| 22 | Signature<MachineRepresentation>* signature); |
| 23 | |
| 24 | void LowerGraph(); |
| 25 | |
| 26 | private: |
| 27 | enum class State : uint8_t { kUnvisited, kOnStack, kInputsPushed, kVisited }; |
| 28 | |
| 29 | struct Replacement { |
| 30 | Node* low; |
| 31 | Node* high; |
| 32 | }; |
| 33 | |
| 34 | Zone* zone() const { return zone_; } |
| 35 | Graph* graph() const { return graph_; } |
| 36 | MachineOperatorBuilder* machine() const { return machine_; } |
| 37 | CommonOperatorBuilder* common() const { return common_; } |
| 38 | Signature<MachineRepresentation>* signature() const { return signature_; } |
| 39 | |
| 40 | void LowerNode(Node* node); |
| 41 | bool DefaultLowering(Node* node); |
| 42 | |
| 43 | void ReplaceNode(Node* old, Node* new_low, Node* new_high); |
| 44 | bool HasReplacementLow(Node* node); |
| 45 | Node* GetReplacementLow(Node* node); |
| 46 | bool HasReplacementHigh(Node* node); |
| 47 | Node* GetReplacementHigh(Node* node); |
| 48 | |
| 49 | Zone* zone_; |
| 50 | Graph* const graph_; |
| 51 | MachineOperatorBuilder* machine_; |
| 52 | CommonOperatorBuilder* common_; |
| 53 | NodeMarker<State> state_; |
| 54 | ZoneStack<Node*> stack_; |
| 55 | Replacement* replacements_; |
| 56 | Signature<MachineRepresentation>* signature_; |
| 57 | }; |
| 58 | |
| 59 | } // namespace compiler |
| 60 | } // namespace internal |
| 61 | } // namespace v8 |
| 62 | |
| 63 | #endif // V8_COMPILER_INT64_REDUCER_H_ |