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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_HYDROGEN_RANGE_ANALYSIS_H_ | |
6 #define V8_HYDROGEN_RANGE_ANALYSIS_H_ | |
7 | |
8 #include "src/hydrogen.h" | |
9 | |
10 namespace v8 { | |
11 namespace internal { | |
12 | |
13 | |
14 class HRangeAnalysisPhase : public HPhase { | |
15 public: | |
16 explicit HRangeAnalysisPhase(HGraph* graph) | |
17 : HPhase("H_Range analysis", graph), changed_ranges_(16, zone()), | |
18 in_worklist_(graph->GetMaximumValueID(), zone()), | |
19 worklist_(32, zone()) {} | |
20 | |
21 void Run(); | |
22 | |
23 private: | |
24 void TraceRange(const char* msg, ...); | |
25 void InferControlFlowRange(HCompareNumericAndBranch* test, | |
26 HBasicBlock* dest); | |
27 void UpdateControlFlowRange(Token::Value op, HValue* value, HValue* other); | |
28 void InferRange(HValue* value); | |
29 void RollBackTo(int index); | |
30 void AddRange(HValue* value, Range* range); | |
31 void AddToWorklist(HValue* value) { | |
32 if (in_worklist_.Contains(value->id())) return; | |
33 in_worklist_.Add(value->id()); | |
34 worklist_.Add(value, zone()); | |
35 } | |
36 void PropagateMinusZeroChecks(HValue* value); | |
37 void PoisonRanges(); | |
38 | |
39 ZoneList<HValue*> changed_ranges_; | |
40 | |
41 BitVector in_worklist_; | |
42 ZoneList<HValue*> worklist_; | |
43 | |
44 DISALLOW_COPY_AND_ASSIGN(HRangeAnalysisPhase); | |
45 }; | |
46 | |
47 | |
48 } // namespace internal | |
49 } // namespace v8 | |
50 | |
51 #endif // V8_HYDROGEN_RANGE_ANALYSIS_H_ | |
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