1 // Copyright 2013 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_CRANKSHAFT_HYDROGEN_RANGE_ANALYSIS_H_ 6 #define V8_CRANKSHAFT_HYDROGEN_RANGE_ANALYSIS_H_ 7 8 #include "src/base/compiler-specific.h" 9 #include "src/crankshaft/hydrogen.h" 10 11 namespace v8 { 12 namespace internal { 13 14 15 class HRangeAnalysisPhase : public HPhase { 16 public: 17 explicit HRangeAnalysisPhase(HGraph* graph) 18 : HPhase("H_Range analysis", graph), changed_ranges_(16, zone()), 19 in_worklist_(graph->GetMaximumValueID(), zone()), 20 worklist_(32, zone()) {} 21 22 void Run(); 23 24 private: 25 PRINTF_FORMAT(2, 3) void TraceRange(const char* msg, ...); 26 void InferControlFlowRange(HCompareNumericAndBranch* test, 27 HBasicBlock* dest); 28 void UpdateControlFlowRange(Token::Value op, HValue* value, HValue* other); 29 void InferRange(HValue* value); 30 void RollBackTo(int index); 31 void AddRange(HValue* value, Range* range); 32 void AddToWorklist(HValue* value) { 33 if (in_worklist_.Contains(value->id())) return; 34 in_worklist_.Add(value->id()); 35 worklist_.Add(value, zone()); 36 } 37 void PropagateMinusZeroChecks(HValue* value); 38 void PoisonRanges(); 39 40 ZoneList<HValue*> changed_ranges_; 41 42 BitVector in_worklist_; 43 ZoneList<HValue*> worklist_; 44 45 DISALLOW_COPY_AND_ASSIGN(HRangeAnalysisPhase); 46 }; 47 48 49 } // namespace internal 50 } // namespace v8 51 52 #endif // V8_CRANKSHAFT_HYDROGEN_RANGE_ANALYSIS_H_ 53
