Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1 | // Copyright 2015 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_ESCAPE_ANALYSIS_H_ |
| 6 | #define V8_COMPILER_ESCAPE_ANALYSIS_H_ |
| 7 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 8 | #include "src/compiler/graph.h" |
| 9 | |
| 10 | namespace v8 { |
| 11 | namespace internal { |
| 12 | namespace compiler { |
| 13 | |
| 14 | // Forward declarations. |
| 15 | class CommonOperatorBuilder; |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 16 | class EscapeStatusAnalysis; |
| 17 | class MergeCache; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 18 | class VirtualState; |
| 19 | class VirtualObject; |
| 20 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 21 | // EscapeObjectAnalysis simulates stores to determine values of loads if |
| 22 | // an object is virtual and eliminated. |
| 23 | class EscapeAnalysis { |
| 24 | public: |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 25 | EscapeAnalysis(Graph* graph, CommonOperatorBuilder* common, Zone* zone); |
| 26 | ~EscapeAnalysis(); |
| 27 | |
| 28 | void Run(); |
| 29 | |
| 30 | Node* GetReplacement(Node* node); |
| 31 | bool IsVirtual(Node* node); |
| 32 | bool IsEscaped(Node* node); |
| 33 | bool CompareVirtualObjects(Node* left, Node* right); |
| 34 | Node* GetOrCreateObjectState(Node* effect, Node* node); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 35 | bool ExistsVirtualAllocate(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 36 | |
| 37 | private: |
| 38 | void RunObjectAnalysis(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 39 | bool Process(Node* node); |
| 40 | void ProcessLoadField(Node* node); |
| 41 | void ProcessStoreField(Node* node); |
| 42 | void ProcessLoadElement(Node* node); |
| 43 | void ProcessStoreElement(Node* node); |
| 44 | void ProcessAllocationUsers(Node* node); |
| 45 | void ProcessAllocation(Node* node); |
| 46 | void ProcessFinishRegion(Node* node); |
| 47 | void ProcessCall(Node* node); |
| 48 | void ProcessStart(Node* node); |
| 49 | bool ProcessEffectPhi(Node* node); |
| 50 | void ProcessLoadFromPhi(int offset, Node* from, Node* node, |
| 51 | VirtualState* states); |
| 52 | |
| 53 | void ForwardVirtualState(Node* node); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 54 | VirtualState* CopyForModificationAt(VirtualState* state, Node* node); |
| 55 | VirtualObject* CopyForModificationAt(VirtualObject* obj, VirtualState* state, |
| 56 | Node* node); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 57 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 58 | Node* replacement(Node* node); |
| 59 | Node* ResolveReplacement(Node* node); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 60 | bool SetReplacement(Node* node, Node* rep); |
| 61 | bool UpdateReplacement(VirtualState* state, Node* node, Node* rep); |
| 62 | |
| 63 | VirtualObject* GetVirtualObject(VirtualState* state, Node* node); |
| 64 | |
| 65 | void DebugPrint(); |
| 66 | void DebugPrintState(VirtualState* state); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 67 | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 68 | Graph* graph() const; |
| 69 | Zone* zone() const { return zone_; } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 70 | CommonOperatorBuilder* common() const { return common_; } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 71 | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 72 | Zone* const zone_; |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 73 | Node* const slot_not_analyzed_; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 74 | CommonOperatorBuilder* const common_; |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 75 | EscapeStatusAnalysis* status_analysis_; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 76 | ZoneVector<VirtualState*> virtual_states_; |
| 77 | ZoneVector<Node*> replacements_; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 78 | MergeCache* cache_; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 79 | |
| 80 | DISALLOW_COPY_AND_ASSIGN(EscapeAnalysis); |
| 81 | }; |
| 82 | |
| 83 | } // namespace compiler |
| 84 | } // namespace internal |
| 85 | } // namespace v8 |
| 86 | |
| 87 | #endif // V8_COMPILER_ESCAPE_ANALYSIS_H_ |