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annotate include/llvm/Analysis/ScalarEvolutionExpressions.h @ 0:95c75e76d11b LLVM3.4

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LLVM 3.4
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Thu, 12 Dec 2013 13:56:28 +0900
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children 54457678186b
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1 //===- llvm/Analysis/ScalarEvolutionExpressions.h - SCEV Exprs --*- C++ -*-===//
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2 //
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3 // The LLVM Compiler Infrastructure
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4 //
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5 // This file is distributed under the University of Illinois Open Source
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6 // License. See LICENSE.TXT for details.
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7 //
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8 //===----------------------------------------------------------------------===//
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9 //
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10 // This file defines the classes used to represent and build scalar expressions.
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11 //
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12 //===----------------------------------------------------------------------===//
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13
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14 #ifndef LLVM_ANALYSIS_SCALAREVOLUTIONEXPRESSIONS_H
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15 #define LLVM_ANALYSIS_SCALAREVOLUTIONEXPRESSIONS_H
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16
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17 #include "llvm/ADT/SmallPtrSet.h"
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18 #include "llvm/Analysis/ScalarEvolution.h"
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19 #include "llvm/Support/ErrorHandling.h"
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20
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21 namespace llvm {
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22 class ConstantInt;
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23 class ConstantRange;
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24 class DominatorTree;
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25
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26 enum SCEVTypes {
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27 // These should be ordered in terms of increasing complexity to make the
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28 // folders simpler.
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29 scConstant, scTruncate, scZeroExtend, scSignExtend, scAddExpr, scMulExpr,
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30 scUDivExpr, scAddRecExpr, scUMaxExpr, scSMaxExpr,
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31 scUnknown, scCouldNotCompute
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32 };
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33
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34 //===--------------------------------------------------------------------===//
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35 /// SCEVConstant - This class represents a constant integer value.
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36 ///
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37 class SCEVConstant : public SCEV {
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38 friend class ScalarEvolution;
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39
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40 ConstantInt *V;
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41 SCEVConstant(const FoldingSetNodeIDRef ID, ConstantInt *v) :
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42 SCEV(ID, scConstant), V(v) {}
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43 public:
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44 ConstantInt *getValue() const { return V; }
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45
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46 Type *getType() const { return V->getType(); }
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47
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48 /// Methods for support type inquiry through isa, cast, and dyn_cast:
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49 static inline bool classof(const SCEV *S) {
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50 return S->getSCEVType() == scConstant;
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51 }
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52 };
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53
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54 //===--------------------------------------------------------------------===//
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55 /// SCEVCastExpr - This is the base class for unary cast operator classes.
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56 ///
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57 class SCEVCastExpr : public SCEV {
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58 protected:
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59 const SCEV *Op;
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60 Type *Ty;
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61
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62 SCEVCastExpr(const FoldingSetNodeIDRef ID,
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63 unsigned SCEVTy, const SCEV *op, Type *ty);
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64
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65 public:
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66 const SCEV *getOperand() const { return Op; }
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67 Type *getType() const { return Ty; }
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68
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69 /// Methods for support type inquiry through isa, cast, and dyn_cast:
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70 static inline bool classof(const SCEV *S) {
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71 return S->getSCEVType() == scTruncate ||
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72 S->getSCEVType() == scZeroExtend ||
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73 S->getSCEVType() == scSignExtend;
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74 }
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75 };
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76
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77 //===--------------------------------------------------------------------===//
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78 /// SCEVTruncateExpr - This class represents a truncation of an integer value
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79 /// to a smaller integer value.
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80 ///
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81 class SCEVTruncateExpr : public SCEVCastExpr {
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82 friend class ScalarEvolution;
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83
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84 SCEVTruncateExpr(const FoldingSetNodeIDRef ID,
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85 const SCEV *op, Type *ty);
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86
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87 public:
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88 /// Methods for support type inquiry through isa, cast, and dyn_cast:
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89 static inline bool classof(const SCEV *S) {
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90 return S->getSCEVType() == scTruncate;
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91 }
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92 };
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93
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94 //===--------------------------------------------------------------------===//
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95 /// SCEVZeroExtendExpr - This class represents a zero extension of a small
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96 /// integer value to a larger integer value.
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97 ///
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98 class SCEVZeroExtendExpr : public SCEVCastExpr {
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99 friend class ScalarEvolution;
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100
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101 SCEVZeroExtendExpr(const FoldingSetNodeIDRef ID,
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102 const SCEV *op, Type *ty);
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103
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104 public:
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105 /// Methods for support type inquiry through isa, cast, and dyn_cast:
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106 static inline bool classof(const SCEV *S) {
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107 return S->getSCEVType() == scZeroExtend;
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108 }
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109 };
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110
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111 //===--------------------------------------------------------------------===//
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112 /// SCEVSignExtendExpr - This class represents a sign extension of a small
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113 /// integer value to a larger integer value.
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114 ///
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115 class SCEVSignExtendExpr : public SCEVCastExpr {
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116 friend class ScalarEvolution;
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117
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118 SCEVSignExtendExpr(const FoldingSetNodeIDRef ID,
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119 const SCEV *op, Type *ty);
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120
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121 public:
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122 /// Methods for support type inquiry through isa, cast, and dyn_cast:
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123 static inline bool classof(const SCEV *S) {
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124 return S->getSCEVType() == scSignExtend;
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125 }
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126 };
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127
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128
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129 //===--------------------------------------------------------------------===//
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130 /// SCEVNAryExpr - This node is a base class providing common
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131 /// functionality for n'ary operators.
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132 ///
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133 class SCEVNAryExpr : public SCEV {
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134 protected:
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135 // Since SCEVs are immutable, ScalarEvolution allocates operand
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136 // arrays with its SCEVAllocator, so this class just needs a simple
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137 // pointer rather than a more elaborate vector-like data structure.
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138 // This also avoids the need for a non-trivial destructor.
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139 const SCEV *const *Operands;
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140 size_t NumOperands;
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141
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142 SCEVNAryExpr(const FoldingSetNodeIDRef ID,
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143 enum SCEVTypes T, const SCEV *const *O, size_t N)
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144 : SCEV(ID, T), Operands(O), NumOperands(N) {}
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145
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146 public:
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147 size_t getNumOperands() const { return NumOperands; }
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148 const SCEV *getOperand(unsigned i) const {
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149 assert(i < NumOperands && "Operand index out of range!");
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150 return Operands[i];
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151 }
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152
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153 typedef const SCEV *const *op_iterator;
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154 op_iterator op_begin() const { return Operands; }
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155 op_iterator op_end() const { return Operands + NumOperands; }
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156
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157 Type *getType() const { return getOperand(0)->getType(); }
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158
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159 NoWrapFlags getNoWrapFlags(NoWrapFlags Mask = NoWrapMask) const {
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160 return (NoWrapFlags)(SubclassData & Mask);
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161 }
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162
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163 /// Methods for support type inquiry through isa, cast, and dyn_cast:
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164 static inline bool classof(const SCEV *S) {
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165 return S->getSCEVType() == scAddExpr ||
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166 S->getSCEVType() == scMulExpr ||
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167 S->getSCEVType() == scSMaxExpr ||
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168 S->getSCEVType() == scUMaxExpr ||
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169 S->getSCEVType() == scAddRecExpr;
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170 }
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171 };
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172
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173 //===--------------------------------------------------------------------===//
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174 /// SCEVCommutativeExpr - This node is the base class for n'ary commutative
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175 /// operators.
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176 ///
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177 class SCEVCommutativeExpr : public SCEVNAryExpr {
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178 protected:
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179 SCEVCommutativeExpr(const FoldingSetNodeIDRef ID,
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180 enum SCEVTypes T, const SCEV *const *O, size_t N)
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181 : SCEVNAryExpr(ID, T, O, N) {}
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182
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183 public:
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184 /// Methods for support type inquiry through isa, cast, and dyn_cast:
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185 static inline bool classof(const SCEV *S) {
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186 return S->getSCEVType() == scAddExpr ||
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187 S->getSCEVType() == scMulExpr ||
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188 S->getSCEVType() == scSMaxExpr ||
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189 S->getSCEVType() == scUMaxExpr;
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190 }
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191
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192 /// Set flags for a non-recurrence without clearing previously set flags.
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193 void setNoWrapFlags(NoWrapFlags Flags) {
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194 SubclassData |= Flags;
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195 }
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196 };
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197
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198
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199 //===--------------------------------------------------------------------===//
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200 /// SCEVAddExpr - This node represents an addition of some number of SCEVs.
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201 ///
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202 class SCEVAddExpr : public SCEVCommutativeExpr {
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203 friend class ScalarEvolution;
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204
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205 SCEVAddExpr(const FoldingSetNodeIDRef ID,
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206 const SCEV *const *O, size_t N)
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207 : SCEVCommutativeExpr(ID, scAddExpr, O, N) {
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208 }
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209
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210 public:
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211 Type *getType() const {
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212 // Use the type of the last operand, which is likely to be a pointer
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213 // type, if there is one. This doesn't usually matter, but it can help
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214 // reduce casts when the expressions are expanded.
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215 return getOperand(getNumOperands() - 1)->getType();
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216 }
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217
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218 /// Methods for support type inquiry through isa, cast, and dyn_cast:
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219 static inline bool classof(const SCEV *S) {
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220 return S->getSCEVType() == scAddExpr;
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221 }
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222 };
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223
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224 //===--------------------------------------------------------------------===//
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225 /// SCEVMulExpr - This node represents multiplication of some number of SCEVs.
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226 ///
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227 class SCEVMulExpr : public SCEVCommutativeExpr {
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228 friend class ScalarEvolution;
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229
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230 SCEVMulExpr(const FoldingSetNodeIDRef ID,
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231 const SCEV *const *O, size_t N)
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232 : SCEVCommutativeExpr(ID, scMulExpr, O, N) {
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233 }
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234
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235 public:
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236 /// Methods for support type inquiry through isa, cast, and dyn_cast:
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diff changeset
237 static inline bool classof(const SCEV *S) {
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238 return S->getSCEVType() == scMulExpr;
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239 }
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diff changeset
240 };
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diff changeset
241
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diff changeset
242
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243 //===--------------------------------------------------------------------===//
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244 /// SCEVUDivExpr - This class represents a binary unsigned division operation.
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245 ///
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246 class SCEVUDivExpr : public SCEV {
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247 friend class ScalarEvolution;
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248
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249 const SCEV *LHS;
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250 const SCEV *RHS;
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251 SCEVUDivExpr(const FoldingSetNodeIDRef ID, const SCEV *lhs, const SCEV *rhs)
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252 : SCEV(ID, scUDivExpr), LHS(lhs), RHS(rhs) {}
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253
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254 public:
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255 const SCEV *getLHS() const { return LHS; }
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256 const SCEV *getRHS() const { return RHS; }
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diff changeset
257
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258 Type *getType() const {
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259 // In most cases the types of LHS and RHS will be the same, but in some
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260 // crazy cases one or the other may be a pointer. ScalarEvolution doesn't
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diff changeset
261 // depend on the type for correctness, but handling types carefully can
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diff changeset
262 // avoid extra casts in the SCEVExpander. The LHS is more likely to be
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diff changeset
263 // a pointer type than the RHS, so use the RHS' type here.
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264 return getRHS()->getType();
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265 }
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266
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267 /// Methods for support type inquiry through isa, cast, and dyn_cast:
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268 static inline bool classof(const SCEV *S) {
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269 return S->getSCEVType() == scUDivExpr;
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270 }
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271 };
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272
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273
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274 //===--------------------------------------------------------------------===//
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275 /// SCEVAddRecExpr - This node represents a polynomial recurrence on the trip
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276 /// count of the specified loop. This is the primary focus of the
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277 /// ScalarEvolution framework; all the other SCEV subclasses are mostly just
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278 /// supporting infrastructure to allow SCEVAddRecExpr expressions to be
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279 /// created and analyzed.
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280 ///
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281 /// All operands of an AddRec are required to be loop invariant.
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282 ///
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283 class SCEVAddRecExpr : public SCEVNAryExpr {
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284 friend class ScalarEvolution;
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285
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286 const Loop *L;
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287
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288 SCEVAddRecExpr(const FoldingSetNodeIDRef ID,
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289 const SCEV *const *O, size_t N, const Loop *l)
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290 : SCEVNAryExpr(ID, scAddRecExpr, O, N), L(l) {}
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291
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292 public:
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293 const SCEV *getStart() const { return Operands[0]; }
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294 const Loop *getLoop() const { return L; }
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295
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296 /// getStepRecurrence - This method constructs and returns the recurrence
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297 /// indicating how much this expression steps by. If this is a polynomial
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298 /// of degree N, it returns a chrec of degree N-1.
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299 /// We cannot determine whether the step recurrence has self-wraparound.
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300 const SCEV *getStepRecurrence(ScalarEvolution &SE) const {
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diff changeset
301 if (isAffine()) return getOperand(1);
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diff changeset
302 return SE.getAddRecExpr(SmallVector<const SCEV *, 3>(op_begin()+1,
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diff changeset
303 op_end()),
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diff changeset
304 getLoop(), FlagAnyWrap);
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305 }
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306
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307 /// isAffine - Return true if this is an affine AddRec (i.e., it represents
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308 /// an expressions A+B*x where A and B are loop invariant values.
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diff changeset
309 bool isAffine() const {
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diff changeset
310 // We know that the start value is invariant. This expression is thus
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diff changeset
311 // affine iff the step is also invariant.
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diff changeset
312 return getNumOperands() == 2;
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diff changeset
313 }
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diff changeset
314
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diff changeset
315 /// isQuadratic - Return true if this is an quadratic AddRec (i.e., it
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diff changeset
316 /// represents an expressions A+B*x+C*x^2 where A, B and C are loop
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parents:
diff changeset
317 /// invariant values. This corresponds to an addrec of the form {L,+,M,+,N}
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parents:
diff changeset
318 bool isQuadratic() const {
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diff changeset
319 return getNumOperands() == 3;
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diff changeset
320 }
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diff changeset
321
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diff changeset
322 /// Set flags for a recurrence without clearing any previously set flags.
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parents:
diff changeset
323 /// For AddRec, either NUW or NSW implies NW. Keep track of this fact here
95c75e76d11b LLVM 3.4
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parents:
diff changeset
324 /// to make it easier to propagate flags.
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diff changeset
325 void setNoWrapFlags(NoWrapFlags Flags) {
95c75e76d11b LLVM 3.4
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parents:
diff changeset
326 if (Flags & (FlagNUW | FlagNSW))
95c75e76d11b LLVM 3.4
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parents:
diff changeset
327 Flags = ScalarEvolution::setFlags(Flags, FlagNW);
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parents:
diff changeset
328 SubclassData |= Flags;
95c75e76d11b LLVM 3.4
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diff changeset
329 }
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diff changeset
330
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diff changeset
331 /// evaluateAtIteration - Return the value of this chain of recurrences at
95c75e76d11b LLVM 3.4
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parents:
diff changeset
332 /// the specified iteration number.
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parents:
diff changeset
333 const SCEV *evaluateAtIteration(const SCEV *It, ScalarEvolution &SE) const;
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parents:
diff changeset
334
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diff changeset
335 /// getNumIterationsInRange - Return the number of iterations of this loop
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parents:
diff changeset
336 /// that produce values in the specified constant range. Another way of
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diff changeset
337 /// looking at this is that it returns the first iteration number where the
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parents:
diff changeset
338 /// value is not in the condition, thus computing the exit count. If the
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parents:
diff changeset
339 /// iteration count can't be computed, an instance of SCEVCouldNotCompute is
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parents:
diff changeset
340 /// returned.
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parents:
diff changeset
341 const SCEV *getNumIterationsInRange(ConstantRange Range,
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
342 ScalarEvolution &SE) const;
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parents:
diff changeset
343
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parents:
diff changeset
344 /// getPostIncExpr - Return an expression representing the value of
95c75e76d11b LLVM 3.4
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parents:
diff changeset
345 /// this expression one iteration of the loop ahead.
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parents:
diff changeset
346 const SCEVAddRecExpr *getPostIncExpr(ScalarEvolution &SE) const {
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parents:
diff changeset
347 return cast<SCEVAddRecExpr>(SE.getAddExpr(this, getStepRecurrence(SE)));
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parents:
diff changeset
348 }
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parents:
diff changeset
349
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diff changeset
350 /// Methods for support type inquiry through isa, cast, and dyn_cast:
95c75e76d11b LLVM 3.4
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parents:
diff changeset
351 static inline bool classof(const SCEV *S) {
95c75e76d11b LLVM 3.4
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parents:
diff changeset
352 return S->getSCEVType() == scAddRecExpr;
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parents:
diff changeset
353 }
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diff changeset
354
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diff changeset
355 /// Splits the SCEV into two vectors of SCEVs representing the subscripts
95c75e76d11b LLVM 3.4
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parents:
diff changeset
356 /// and sizes of an array access. Returns the remainder of the
95c75e76d11b LLVM 3.4
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parents:
diff changeset
357 /// delinearization that is the offset start of the array.
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parents:
diff changeset
358 const SCEV *delinearize(ScalarEvolution &SE,
95c75e76d11b LLVM 3.4
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parents:
diff changeset
359 SmallVectorImpl<const SCEV *> &Subscripts,
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
360 SmallVectorImpl<const SCEV *> &Sizes) const;
95c75e76d11b LLVM 3.4
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parents:
diff changeset
361 };
95c75e76d11b LLVM 3.4
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parents:
diff changeset
362
95c75e76d11b LLVM 3.4
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parents:
diff changeset
363 //===--------------------------------------------------------------------===//
95c75e76d11b LLVM 3.4
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parents:
diff changeset
364 /// SCEVSMaxExpr - This class represents a signed maximum selection.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
365 ///
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parents:
diff changeset
366 class SCEVSMaxExpr : public SCEVCommutativeExpr {
95c75e76d11b LLVM 3.4
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parents:
diff changeset
367 friend class ScalarEvolution;
95c75e76d11b LLVM 3.4
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parents:
diff changeset
368
95c75e76d11b LLVM 3.4
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parents:
diff changeset
369 SCEVSMaxExpr(const FoldingSetNodeIDRef ID,
95c75e76d11b LLVM 3.4
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parents:
diff changeset
370 const SCEV *const *O, size_t N)
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parents:
diff changeset
371 : SCEVCommutativeExpr(ID, scSMaxExpr, O, N) {
95c75e76d11b LLVM 3.4
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parents:
diff changeset
372 // Max never overflows.
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parents:
diff changeset
373 setNoWrapFlags((NoWrapFlags)(FlagNUW | FlagNSW));
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parents:
diff changeset
374 }
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parents:
diff changeset
375
95c75e76d11b LLVM 3.4
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parents:
diff changeset
376 public:
95c75e76d11b LLVM 3.4
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parents:
diff changeset
377 /// Methods for support type inquiry through isa, cast, and dyn_cast:
95c75e76d11b LLVM 3.4
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parents:
diff changeset
378 static inline bool classof(const SCEV *S) {
95c75e76d11b LLVM 3.4
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parents:
diff changeset
379 return S->getSCEVType() == scSMaxExpr;
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parents:
diff changeset
380 }
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parents:
diff changeset
381 };
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parents:
diff changeset
382
95c75e76d11b LLVM 3.4
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parents:
diff changeset
383
95c75e76d11b LLVM 3.4
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parents:
diff changeset
384 //===--------------------------------------------------------------------===//
95c75e76d11b LLVM 3.4
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parents:
diff changeset
385 /// SCEVUMaxExpr - This class represents an unsigned maximum selection.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
386 ///
95c75e76d11b LLVM 3.4
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parents:
diff changeset
387 class SCEVUMaxExpr : public SCEVCommutativeExpr {
95c75e76d11b LLVM 3.4
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parents:
diff changeset
388 friend class ScalarEvolution;
95c75e76d11b LLVM 3.4
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parents:
diff changeset
389
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
390 SCEVUMaxExpr(const FoldingSetNodeIDRef ID,
95c75e76d11b LLVM 3.4
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parents:
diff changeset
391 const SCEV *const *O, size_t N)
95c75e76d11b LLVM 3.4
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parents:
diff changeset
392 : SCEVCommutativeExpr(ID, scUMaxExpr, O, N) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
393 // Max never overflows.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
394 setNoWrapFlags((NoWrapFlags)(FlagNUW | FlagNSW));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
395 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
396
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
397 public:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
398 /// Methods for support type inquiry through isa, cast, and dyn_cast:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
399 static inline bool classof(const SCEV *S) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
400 return S->getSCEVType() == scUMaxExpr;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
401 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
402 };
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
403
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
404 //===--------------------------------------------------------------------===//
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
405 /// SCEVUnknown - This means that we are dealing with an entirely unknown SCEV
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
406 /// value, and only represent it as its LLVM Value. This is the "bottom"
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
407 /// value for the analysis.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
408 ///
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
409 class SCEVUnknown : public SCEV, private CallbackVH {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
410 friend class ScalarEvolution;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
411
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
412 // Implement CallbackVH.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
413 virtual void deleted();
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
414 virtual void allUsesReplacedWith(Value *New);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
415
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
416 /// SE - The parent ScalarEvolution value. This is used to update
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
417 /// the parent's maps when the value associated with a SCEVUnknown
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
418 /// is deleted or RAUW'd.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
419 ScalarEvolution *SE;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
420
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
421 /// Next - The next pointer in the linked list of all
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
422 /// SCEVUnknown instances owned by a ScalarEvolution.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
423 SCEVUnknown *Next;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
424
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
425 SCEVUnknown(const FoldingSetNodeIDRef ID, Value *V,
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
426 ScalarEvolution *se, SCEVUnknown *next) :
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
427 SCEV(ID, scUnknown), CallbackVH(V), SE(se), Next(next) {}
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
428
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
429 public:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
430 Value *getValue() const { return getValPtr(); }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
431
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
432 /// isSizeOf, isAlignOf, isOffsetOf - Test whether this is a special
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
433 /// constant representing a type size, alignment, or field offset in
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
434 /// a target-independent manner, and hasn't happened to have been
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
435 /// folded with other operations into something unrecognizable. This
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
436 /// is mainly only useful for pretty-printing and other situations
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
437 /// where it isn't absolutely required for these to succeed.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
438 bool isSizeOf(Type *&AllocTy) const;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
439 bool isAlignOf(Type *&AllocTy) const;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
440 bool isOffsetOf(Type *&STy, Constant *&FieldNo) const;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
441
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
442 Type *getType() const { return getValPtr()->getType(); }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
443
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
444 /// Methods for support type inquiry through isa, cast, and dyn_cast:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
445 static inline bool classof(const SCEV *S) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
446 return S->getSCEVType() == scUnknown;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
447 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
448 };
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
449
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
450 /// SCEVVisitor - This class defines a simple visitor class that may be used
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
451 /// for various SCEV analysis purposes.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
452 template<typename SC, typename RetVal=void>
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
453 struct SCEVVisitor {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
454 RetVal visit(const SCEV *S) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
455 switch (S->getSCEVType()) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
456 case scConstant:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
457 return ((SC*)this)->visitConstant((const SCEVConstant*)S);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
458 case scTruncate:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
459 return ((SC*)this)->visitTruncateExpr((const SCEVTruncateExpr*)S);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
460 case scZeroExtend:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
461 return ((SC*)this)->visitZeroExtendExpr((const SCEVZeroExtendExpr*)S);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
462 case scSignExtend:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
463 return ((SC*)this)->visitSignExtendExpr((const SCEVSignExtendExpr*)S);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
464 case scAddExpr:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
465 return ((SC*)this)->visitAddExpr((const SCEVAddExpr*)S);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
466 case scMulExpr:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
467 return ((SC*)this)->visitMulExpr((const SCEVMulExpr*)S);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
468 case scUDivExpr:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
469 return ((SC*)this)->visitUDivExpr((const SCEVUDivExpr*)S);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
470 case scAddRecExpr:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
471 return ((SC*)this)->visitAddRecExpr((const SCEVAddRecExpr*)S);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
472 case scSMaxExpr:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
473 return ((SC*)this)->visitSMaxExpr((const SCEVSMaxExpr*)S);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
474 case scUMaxExpr:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
475 return ((SC*)this)->visitUMaxExpr((const SCEVUMaxExpr*)S);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
476 case scUnknown:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
477 return ((SC*)this)->visitUnknown((const SCEVUnknown*)S);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
478 case scCouldNotCompute:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
479 return ((SC*)this)->visitCouldNotCompute((const SCEVCouldNotCompute*)S);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
480 default:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
481 llvm_unreachable("Unknown SCEV type!");
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
482 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
483 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
484
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
485 RetVal visitCouldNotCompute(const SCEVCouldNotCompute *S) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
486 llvm_unreachable("Invalid use of SCEVCouldNotCompute!");
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
487 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
488 };
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
489
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
490 /// Visit all nodes in the expression tree using worklist traversal.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
491 ///
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
492 /// Visitor implements:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
493 /// // return true to follow this node.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
494 /// bool follow(const SCEV *S);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
495 /// // return true to terminate the search.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
496 /// bool isDone();
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
497 template<typename SV>
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
498 class SCEVTraversal {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
499 SV &Visitor;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
500 SmallVector<const SCEV *, 8> Worklist;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
501 SmallPtrSet<const SCEV *, 8> Visited;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
502
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
503 void push(const SCEV *S) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
504 if (Visited.insert(S) && Visitor.follow(S))
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
505 Worklist.push_back(S);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
506 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
507 public:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
508 SCEVTraversal(SV& V): Visitor(V) {}
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
509
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
510 void visitAll(const SCEV *Root) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
511 push(Root);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
512 while (!Worklist.empty() && !Visitor.isDone()) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
513 const SCEV *S = Worklist.pop_back_val();
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
514
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
515 switch (S->getSCEVType()) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
516 case scConstant:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
517 case scUnknown:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
518 break;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
519 case scTruncate:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
520 case scZeroExtend:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
521 case scSignExtend:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
522 push(cast<SCEVCastExpr>(S)->getOperand());
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
523 break;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
524 case scAddExpr:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
525 case scMulExpr:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
526 case scSMaxExpr:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
527 case scUMaxExpr:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
528 case scAddRecExpr: {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
529 const SCEVNAryExpr *NAry = cast<SCEVNAryExpr>(S);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
530 for (SCEVNAryExpr::op_iterator I = NAry->op_begin(),
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
531 E = NAry->op_end(); I != E; ++I) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
532 push(*I);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
533 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
534 break;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
535 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
536 case scUDivExpr: {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
537 const SCEVUDivExpr *UDiv = cast<SCEVUDivExpr>(S);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
538 push(UDiv->getLHS());
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
539 push(UDiv->getRHS());
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
540 break;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
541 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
542 case scCouldNotCompute:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
543 llvm_unreachable("Attempt to use a SCEVCouldNotCompute object!");
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
544 default:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
545 llvm_unreachable("Unknown SCEV kind!");
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
546 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
547 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
548 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
549 };
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
550
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
551 /// Use SCEVTraversal to visit all nodes in the givien expression tree.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
552 template<typename SV>
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
553 void visitAll(const SCEV *Root, SV& Visitor) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
554 SCEVTraversal<SV> T(Visitor);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
555 T.visitAll(Root);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
556 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
557
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
558 typedef DenseMap<const Value*, Value*> ValueToValueMap;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
559
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
560 /// The SCEVParameterRewriter takes a scalar evolution expression and updates
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
561 /// the SCEVUnknown components following the Map (Value -> Value).
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
562 struct SCEVParameterRewriter
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
563 : public SCEVVisitor<SCEVParameterRewriter, const SCEV*> {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
564 public:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
565 static const SCEV *rewrite(const SCEV *Scev, ScalarEvolution &SE,
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
566 ValueToValueMap &Map) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
567 SCEVParameterRewriter Rewriter(SE, Map);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
568 return Rewriter.visit(Scev);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
569 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
570
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
571 SCEVParameterRewriter(ScalarEvolution &S, ValueToValueMap &M)
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
572 : SE(S), Map(M) {}
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
573
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
574 const SCEV *visitConstant(const SCEVConstant *Constant) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
575 return Constant;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
576 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
577
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
578 const SCEV *visitTruncateExpr(const SCEVTruncateExpr *Expr) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
579 const SCEV *Operand = visit(Expr->getOperand());
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
580 return SE.getTruncateExpr(Operand, Expr->getType());
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
581 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
582
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
583 const SCEV *visitZeroExtendExpr(const SCEVZeroExtendExpr *Expr) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
584 const SCEV *Operand = visit(Expr->getOperand());
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
585 return SE.getZeroExtendExpr(Operand, Expr->getType());
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
586 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
587
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
588 const SCEV *visitSignExtendExpr(const SCEVSignExtendExpr *Expr) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
589 const SCEV *Operand = visit(Expr->getOperand());
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
590 return SE.getSignExtendExpr(Operand, Expr->getType());
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
591 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
592
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
593 const SCEV *visitAddExpr(const SCEVAddExpr *Expr) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
594 SmallVector<const SCEV *, 2> Operands;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
595 for (int i = 0, e = Expr->getNumOperands(); i < e; ++i)
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
596 Operands.push_back(visit(Expr->getOperand(i)));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
597 return SE.getAddExpr(Operands);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
598 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
599
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
600 const SCEV *visitMulExpr(const SCEVMulExpr *Expr) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
601 SmallVector<const SCEV *, 2> Operands;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
602 for (int i = 0, e = Expr->getNumOperands(); i < e; ++i)
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
603 Operands.push_back(visit(Expr->getOperand(i)));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
604 return SE.getMulExpr(Operands);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
605 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
606
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
607 const SCEV *visitUDivExpr(const SCEVUDivExpr *Expr) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
608 return SE.getUDivExpr(visit(Expr->getLHS()), visit(Expr->getRHS()));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
609 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
610
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
611 const SCEV *visitAddRecExpr(const SCEVAddRecExpr *Expr) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
612 SmallVector<const SCEV *, 2> Operands;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
613 for (int i = 0, e = Expr->getNumOperands(); i < e; ++i)
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
614 Operands.push_back(visit(Expr->getOperand(i)));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
615 return SE.getAddRecExpr(Operands, Expr->getLoop(),
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
616 Expr->getNoWrapFlags());
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
617 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
618
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
619 const SCEV *visitSMaxExpr(const SCEVSMaxExpr *Expr) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
620 SmallVector<const SCEV *, 2> Operands;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
621 for (int i = 0, e = Expr->getNumOperands(); i < e; ++i)
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
622 Operands.push_back(visit(Expr->getOperand(i)));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
623 return SE.getSMaxExpr(Operands);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
624 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
625
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
626 const SCEV *visitUMaxExpr(const SCEVUMaxExpr *Expr) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
627 SmallVector<const SCEV *, 2> Operands;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
628 for (int i = 0, e = Expr->getNumOperands(); i < e; ++i)
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
629 Operands.push_back(visit(Expr->getOperand(i)));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
630 return SE.getUMaxExpr(Operands);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
631 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
632
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
633 const SCEV *visitUnknown(const SCEVUnknown *Expr) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
634 Value *V = Expr->getValue();
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
635 if (Map.count(V))
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
636 return SE.getUnknown(Map[V]);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
637 return Expr;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
638 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
639
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
640 const SCEV *visitCouldNotCompute(const SCEVCouldNotCompute *Expr) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
641 return Expr;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
642 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
643
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
644 private:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
645 ScalarEvolution &SE;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
646 ValueToValueMap &Map;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
647 };
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
648
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
649 typedef DenseMap<const Loop*, const SCEV*> LoopToScevMapT;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
650
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
651 /// The SCEVApplyRewriter takes a scalar evolution expression and applies
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
652 /// the Map (Loop -> SCEV) to all AddRecExprs.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
653 struct SCEVApplyRewriter
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
654 : public SCEVVisitor<SCEVApplyRewriter, const SCEV*> {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
655 public:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
656 static const SCEV *rewrite(const SCEV *Scev, LoopToScevMapT &Map,
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
657 ScalarEvolution &SE) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
658 SCEVApplyRewriter Rewriter(SE, Map);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
659 return Rewriter.visit(Scev);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
660 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
661
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
662 SCEVApplyRewriter(ScalarEvolution &S, LoopToScevMapT &M)
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
663 : SE(S), Map(M) {}
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
664
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
665 const SCEV *visitConstant(const SCEVConstant *Constant) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
666 return Constant;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
667 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
668
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
669 const SCEV *visitTruncateExpr(const SCEVTruncateExpr *Expr) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
670 const SCEV *Operand = visit(Expr->getOperand());
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
671 return SE.getTruncateExpr(Operand, Expr->getType());
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
672 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
673
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
674 const SCEV *visitZeroExtendExpr(const SCEVZeroExtendExpr *Expr) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
675 const SCEV *Operand = visit(Expr->getOperand());
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
676 return SE.getZeroExtendExpr(Operand, Expr->getType());
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
677 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
678
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
679 const SCEV *visitSignExtendExpr(const SCEVSignExtendExpr *Expr) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
680 const SCEV *Operand = visit(Expr->getOperand());
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
681 return SE.getSignExtendExpr(Operand, Expr->getType());
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
682 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
683
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
684 const SCEV *visitAddExpr(const SCEVAddExpr *Expr) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
685 SmallVector<const SCEV *, 2> Operands;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
686 for (int i = 0, e = Expr->getNumOperands(); i < e; ++i)
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
687 Operands.push_back(visit(Expr->getOperand(i)));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
688 return SE.getAddExpr(Operands);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
689 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
690
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
691 const SCEV *visitMulExpr(const SCEVMulExpr *Expr) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
692 SmallVector<const SCEV *, 2> Operands;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
693 for (int i = 0, e = Expr->getNumOperands(); i < e; ++i)
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
694 Operands.push_back(visit(Expr->getOperand(i)));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
695 return SE.getMulExpr(Operands);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
696 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
697
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
698 const SCEV *visitUDivExpr(const SCEVUDivExpr *Expr) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
699 return SE.getUDivExpr(visit(Expr->getLHS()), visit(Expr->getRHS()));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
700 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
701
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
702 const SCEV *visitAddRecExpr(const SCEVAddRecExpr *Expr) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
703 SmallVector<const SCEV *, 2> Operands;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
704 for (int i = 0, e = Expr->getNumOperands(); i < e; ++i)
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
705 Operands.push_back(visit(Expr->getOperand(i)));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
706
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
707 const Loop *L = Expr->getLoop();
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
708 const SCEV *Res = SE.getAddRecExpr(Operands, L, Expr->getNoWrapFlags());
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
709
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
710 if (0 == Map.count(L))
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
711 return Res;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
712
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
713 const SCEVAddRecExpr *Rec = (const SCEVAddRecExpr *) Res;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
714 return Rec->evaluateAtIteration(Map[L], SE);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
715 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
716
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
717 const SCEV *visitSMaxExpr(const SCEVSMaxExpr *Expr) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
718 SmallVector<const SCEV *, 2> Operands;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
719 for (int i = 0, e = Expr->getNumOperands(); i < e; ++i)
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
720 Operands.push_back(visit(Expr->getOperand(i)));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
721 return SE.getSMaxExpr(Operands);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
722 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
723
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
724 const SCEV *visitUMaxExpr(const SCEVUMaxExpr *Expr) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
725 SmallVector<const SCEV *, 2> Operands;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
726 for (int i = 0, e = Expr->getNumOperands(); i < e; ++i)
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
727 Operands.push_back(visit(Expr->getOperand(i)));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
728 return SE.getUMaxExpr(Operands);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
729 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
730
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
731 const SCEV *visitUnknown(const SCEVUnknown *Expr) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
732 return Expr;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
733 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
734
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
735 const SCEV *visitCouldNotCompute(const SCEVCouldNotCompute *Expr) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
736 return Expr;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
737 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
738
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
739 private:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
740 ScalarEvolution &SE;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
741 LoopToScevMapT &Map;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
742 };
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
743
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
744 /// Applies the Map (Loop -> SCEV) to the given Scev.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
745 static inline const SCEV *apply(const SCEV *Scev, LoopToScevMapT &Map,
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
746 ScalarEvolution &SE) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
747 return SCEVApplyRewriter::rewrite(Scev, Map, SE);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
748 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
749
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
750 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
751
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
752 #endif