| // 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_HYDROGEN_RANGE_ANALYSIS_H_ |
| #define V8_HYDROGEN_RANGE_ANALYSIS_H_ |
| |
| #include "src/hydrogen.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| |
| class HRangeAnalysisPhase : public HPhase { |
| public: |
| explicit HRangeAnalysisPhase(HGraph* graph) |
| : HPhase("H_Range analysis", graph), changed_ranges_(16, zone()), |
| in_worklist_(graph->GetMaximumValueID(), zone()), |
| worklist_(32, zone()) {} |
| |
| void Run(); |
| |
| private: |
| void TraceRange(const char* msg, ...); |
| void InferControlFlowRange(HCompareNumericAndBranch* test, |
| HBasicBlock* dest); |
| void UpdateControlFlowRange(Token::Value op, HValue* value, HValue* other); |
| void InferRange(HValue* value); |
| void RollBackTo(int index); |
| void AddRange(HValue* value, Range* range); |
| void AddToWorklist(HValue* value) { |
| if (in_worklist_.Contains(value->id())) return; |
| in_worklist_.Add(value->id()); |
| worklist_.Add(value, zone()); |
| } |
| void PropagateMinusZeroChecks(HValue* value); |
| void PoisonRanges(); |
| |
| ZoneList<HValue*> changed_ranges_; |
| |
| BitVector in_worklist_; |
| ZoneList<HValue*> worklist_; |
| |
| DISALLOW_COPY_AND_ASSIGN(HRangeAnalysisPhase); |
| }; |
| |
| |
| } } // namespace v8::internal |
| |
| #endif // V8_HYDROGEN_RANGE_ANALYSIS_H_ |