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Side by Side Diff: src/IceLiveness.h

Issue 1216963007: Doxygenize the documentation comments (Closed) Base URL: https://chromium.googlesource.com/native_client/pnacl-subzero.git@master
Patch Set: Created 5 years, 5 months ago
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1 //===- subzero/src/IceLiveness.h - Liveness analysis ------------*- C++ -*-===// 1 //===- subzero/src/IceLiveness.h - Liveness analysis ------------*- C++ -*-===//
2 // 2 //
3 // The Subzero Code Generator 3 // The Subzero Code Generator
4 // 4 //
5 // This file is distributed under the University of Illinois Open Source 5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details. 6 // License. See LICENSE.TXT for details.
7 // 7 //
8 //===----------------------------------------------------------------------===// 8 //===----------------------------------------------------------------------===//
9 // 9 //
10 // This file declares the Liveness and LivenessNode classes, 10 // This file declares the Liveness and LivenessNode classes,
(...skipping 19 matching lines...) Expand all
30 Liveness() = delete; 30 Liveness() = delete;
31 Liveness(const Liveness &) = delete; 31 Liveness(const Liveness &) = delete;
32 Liveness &operator=(const Liveness &) = delete; 32 Liveness &operator=(const Liveness &) = delete;
33 33
34 class LivenessNode { 34 class LivenessNode {
35 LivenessNode &operator=(const LivenessNode &) = delete; 35 LivenessNode &operator=(const LivenessNode &) = delete;
36 36
37 public: 37 public:
38 LivenessNode() = default; 38 LivenessNode() = default;
39 LivenessNode(const LivenessNode &) = default; 39 LivenessNode(const LivenessNode &) = default;
40 // NumLocals is the number of Variables local to this block. 40 /// NumLocals is the number of Variables local to this block.
41 SizeT NumLocals = 0; 41 SizeT NumLocals = 0;
42 // NumNonDeadPhis tracks the number of Phi instructions that 42 /// NumNonDeadPhis tracks the number of Phi instructions that
43 // Inst::liveness() identified as tentatively live. If 43 /// Inst::liveness() identified as tentatively live. If
44 // NumNonDeadPhis changes from the last liveness pass, then liveness 44 /// NumNonDeadPhis changes from the last liveness pass, then liveness
45 // has not yet converged. 45 /// has not yet converged.
46 SizeT NumNonDeadPhis = 0; 46 SizeT NumNonDeadPhis = 0;
47 // LiveToVarMap maps a liveness bitvector index to a Variable. This 47 // LiveToVarMap maps a liveness bitvector index to a Variable. This
48 // is generally just for printing/dumping. The index should be less 48 // is generally just for printing/dumping. The index should be less
49 // than NumLocals + Liveness::NumGlobals. 49 // than NumLocals + Liveness::NumGlobals.
50 std::vector<Variable *> LiveToVarMap; 50 std::vector<Variable *> LiveToVarMap;
51 // LiveIn and LiveOut track the in- and out-liveness of the global 51 // LiveIn and LiveOut track the in- and out-liveness of the global
52 // variables. The size of each vector is 52 // variables. The size of each vector is
53 // LivenessNode::NumGlobals. 53 // LivenessNode::NumGlobals.
54 LivenessBV LiveIn, LiveOut; 54 LivenessBV LiveIn, LiveOut;
55 // LiveBegin and LiveEnd track the instruction numbers of the start 55 // LiveBegin and LiveEnd track the instruction numbers of the start
(...skipping 32 matching lines...) Expand 10 before | Expand all | Expand 10 after
88 resize(Index); 88 resize(Index);
89 return &Nodes[Index].LiveBegin; 89 return &Nodes[Index].LiveBegin;
90 } 90 }
91 LiveBeginEndMap *getLiveEnd(const CfgNode *Node) { 91 LiveBeginEndMap *getLiveEnd(const CfgNode *Node) {
92 SizeT Index = Node->getIndex(); 92 SizeT Index = Node->getIndex();
93 resize(Index); 93 resize(Index);
94 return &Nodes[Index].LiveEnd; 94 return &Nodes[Index].LiveEnd;
95 } 95 }
96 96
97 private: 97 private:
98 // Resize Nodes so that Nodes[Index] is valid. 98 /// Resize Nodes so that Nodes[Index] is valid.
99 void resize(SizeT Index) { 99 void resize(SizeT Index) {
100 if (Index >= Nodes.size()) 100 if (Index >= Nodes.size())
101 Nodes.resize(Index + 1); 101 Nodes.resize(Index + 1);
102 } 102 }
103 Cfg *Func; 103 Cfg *Func;
104 LivenessMode Mode; 104 LivenessMode Mode;
105 SizeT NumGlobals = 0; 105 SizeT NumGlobals = 0;
106 // Size of Nodes is Cfg::Nodes.size(). 106 /// Size of Nodes is Cfg::Nodes.size().
107 std::vector<LivenessNode> Nodes; 107 std::vector<LivenessNode> Nodes;
108 // VarToLiveMap maps a Variable's Variable::Number to its live index 108 /// VarToLiveMap maps a Variable's Variable::Number to its live index
109 // within its basic block. 109 /// within its basic block.
110 std::vector<SizeT> VarToLiveMap; 110 std::vector<SizeT> VarToLiveMap;
111 // LiveToVarMap is analogous to LivenessNode::LiveToVarMap, but for 111 /// LiveToVarMap is analogous to LivenessNode::LiveToVarMap, but for
112 // non-local variables. 112 /// non-local variables.
113 std::vector<Variable *> LiveToVarMap; 113 std::vector<Variable *> LiveToVarMap;
114 }; 114 };
115 115
116 } // end of namespace Ice 116 } // end of namespace Ice
117 117
118 #endif // SUBZERO_SRC_ICELIVENESS_H 118 #endif // SUBZERO_SRC_ICELIVENESS_H
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