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1 //===-- FunctionLoweringInfo.cpp ------------------------------------------===//
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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2 //
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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3 // The LLVM Compiler Infrastructure
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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4 //
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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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 implements routines for translating functions from LLVM IR into
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11 // Machine IR.
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12 //
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13 //===----------------------------------------------------------------------===//
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14
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15 #include "llvm/CodeGen/FunctionLoweringInfo.h"
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16 #include "llvm/CodeGen/Analysis.h"
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17 #include "llvm/CodeGen/MachineFrameInfo.h"
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18 #include "llvm/CodeGen/MachineFunction.h"
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19 #include "llvm/CodeGen/MachineInstrBuilder.h"
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20 #include "llvm/CodeGen/MachineModuleInfo.h"
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21 #include "llvm/CodeGen/MachineRegisterInfo.h"
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95
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22 #include "llvm/CodeGen/WinEHFuncInfo.h"
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23 #include "llvm/IR/DataLayout.h"
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77
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24 #include "llvm/IR/DebugInfo.h"
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25 #include "llvm/IR/DerivedTypes.h"
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26 #include "llvm/IR/Function.h"
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27 #include "llvm/IR/Instructions.h"
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28 #include "llvm/IR/IntrinsicInst.h"
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29 #include "llvm/IR/LLVMContext.h"
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30 #include "llvm/IR/Module.h"
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31 #include "llvm/Support/Debug.h"
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32 #include "llvm/Support/ErrorHandling.h"
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33 #include "llvm/Support/MathExtras.h"
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95
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34 #include "llvm/Support/raw_ostream.h"
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77
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35 #include "llvm/Target/TargetFrameLowering.h"
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36 #include "llvm/Target/TargetInstrInfo.h"
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37 #include "llvm/Target/TargetLowering.h"
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38 #include "llvm/Target/TargetOptions.h"
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39 #include "llvm/Target/TargetRegisterInfo.h"
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77
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40 #include "llvm/Target/TargetSubtargetInfo.h"
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41 #include <algorithm>
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42 using namespace llvm;
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43
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77
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44 #define DEBUG_TYPE "function-lowering-info"
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45
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46 /// isUsedOutsideOfDefiningBlock - Return true if this instruction is used by
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47 /// PHI nodes or outside of the basic block that defines it, or used by a
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48 /// switch or atomic instruction, which may expand to multiple basic blocks.
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49 static bool isUsedOutsideOfDefiningBlock(const Instruction *I) {
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50 if (I->use_empty()) return false;
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51 if (isa<PHINode>(I)) return true;
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52 const BasicBlock *BB = I->getParent();
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77
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53 for (const User *U : I->users())
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54 if (cast<Instruction>(U)->getParent() != BB || isa<PHINode>(U))
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55 return true;
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77
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56
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57 return false;
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58 }
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59
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83
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60 static ISD::NodeType getPreferredExtendForValue(const Value *V) {
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61 // For the users of the source value being used for compare instruction, if
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62 // the number of signed predicate is greater than unsigned predicate, we
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63 // prefer to use SIGN_EXTEND.
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64 //
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65 // With this optimization, we would be able to reduce some redundant sign or
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66 // zero extension instruction, and eventually more machine CSE opportunities
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67 // can be exposed.
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68 ISD::NodeType ExtendKind = ISD::ANY_EXTEND;
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69 unsigned NumOfSigned = 0, NumOfUnsigned = 0;
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70 for (const User *U : V->users()) {
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71 if (const auto *CI = dyn_cast<CmpInst>(U)) {
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72 NumOfSigned += CI->isSigned();
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73 NumOfUnsigned += CI->isUnsigned();
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74 }
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75 }
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76 if (NumOfSigned > NumOfUnsigned)
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77 ExtendKind = ISD::SIGN_EXTEND;
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78
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79 return ExtendKind;
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80 }
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81
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77
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82 void FunctionLoweringInfo::set(const Function &fn, MachineFunction &mf,
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83 SelectionDAG *DAG) {
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84 Fn = &fn;
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85 MF = &mf;
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83
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86 TLI = MF->getSubtarget().getTargetLowering();
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87 RegInfo = &MF->getRegInfo();
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88 MachineModuleInfo &MMI = MF->getMMI();
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100
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89 const TargetFrameLowering *TFI = MF->getSubtarget().getFrameLowering();
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120
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90 unsigned StackAlign = TFI->getStackAlignment();
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91
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92 // Check whether the function can return without sret-demotion.
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93 SmallVector<ISD::OutputArg, 4> Outs;
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95
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94 GetReturnInfo(Fn->getReturnType(), Fn->getAttributes(), Outs, *TLI,
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95 mf.getDataLayout());
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96 CanLowerReturn = TLI->CanLowerReturn(Fn->getCallingConv(), *MF,
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83
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97 Fn->isVarArg(), Outs, Fn->getContext());
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98
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120
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99 // If this personality uses funclets, we need to do a bit more work.
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100 DenseMap<const AllocaInst *, TinyPtrVector<int *>> CatchObjects;
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101 EHPersonality Personality = classifyEHPersonality(
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102 Fn->hasPersonalityFn() ? Fn->getPersonalityFn() : nullptr);
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103 if (isFuncletEHPersonality(Personality)) {
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104 // Calculate state numbers if we haven't already.
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105 WinEHFuncInfo &EHInfo = *MF->getWinEHFuncInfo();
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106 if (Personality == EHPersonality::MSVC_CXX)
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107 calculateWinCXXEHStateNumbers(&fn, EHInfo);
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108 else if (isAsynchronousEHPersonality(Personality))
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109 calculateSEHStateNumbers(&fn, EHInfo);
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110 else if (Personality == EHPersonality::CoreCLR)
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111 calculateClrEHStateNumbers(&fn, EHInfo);
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112
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113 // Map all BB references in the WinEH data to MBBs.
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114 for (WinEHTryBlockMapEntry &TBME : EHInfo.TryBlockMap) {
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115 for (WinEHHandlerType &H : TBME.HandlerArray) {
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116 if (const AllocaInst *AI = H.CatchObj.Alloca)
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117 CatchObjects.insert({AI, {}}).first->second.push_back(
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118 &H.CatchObj.FrameIndex);
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119 else
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120 H.CatchObj.FrameIndex = INT_MAX;
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121 }
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122 }
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123 }
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124
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125 // Initialize the mapping of values to registers. This is only set up for
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126 // instruction values that are used outside of the block that defines
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127 // them.
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128 Function::const_iterator BB = Fn->begin(), EB = Fn->end();
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129 for (; BB != EB; ++BB)
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130 for (BasicBlock::const_iterator I = BB->begin(), E = BB->end();
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131 I != E; ++I) {
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132 if (const AllocaInst *AI = dyn_cast<AllocaInst>(I)) {
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133 Type *Ty = AI->getAllocatedType();
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134 unsigned Align =
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135 std::max((unsigned)MF->getDataLayout().getPrefTypeAlignment(Ty),
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136 AI->getAlignment());
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137
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138 // Static allocas can be folded into the initial stack frame
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139 // adjustment. For targets that don't realign the stack, don't
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140 // do this if there is an extra alignment requirement.
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141 if (AI->isStaticAlloca() &&
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142 (TFI->isStackRealignable() || (Align <= StackAlign))) {
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143 const ConstantInt *CUI = cast<ConstantInt>(AI->getArraySize());
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144 uint64_t TySize = MF->getDataLayout().getTypeAllocSize(Ty);
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145
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146 TySize *= CUI->getZExtValue(); // Get total allocated size.
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147 if (TySize == 0) TySize = 1; // Don't create zero-sized stack objects.
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120
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148 int FrameIndex = INT_MAX;
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149 auto Iter = CatchObjects.find(AI);
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150 if (Iter != CatchObjects.end() && TLI->needsFixedCatchObjects()) {
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151 FrameIndex = MF->getFrameInfo().CreateFixedObject(
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152 TySize, 0, /*Immutable=*/false, /*isAliased=*/true);
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153 MF->getFrameInfo().setObjectAlignment(FrameIndex, Align);
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154 } else {
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155 FrameIndex =
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156 MF->getFrameInfo().CreateStackObject(TySize, Align, false, AI);
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157 }
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158
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120
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159 StaticAllocaMap[AI] = FrameIndex;
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160 // Update the catch handler information.
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161 if (Iter != CatchObjects.end()) {
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162 for (int *CatchObjPtr : Iter->second)
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163 *CatchObjPtr = FrameIndex;
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164 }
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165 } else {
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100
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166 // FIXME: Overaligned static allocas should be grouped into
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167 // a single dynamic allocation instead of using a separate
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168 // stack allocation for each one.
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77
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169 if (Align <= StackAlign)
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170 Align = 0;
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171 // Inform the Frame Information that we have variable-sized objects.
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120
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172 MF->getFrameInfo().CreateVariableSizedObject(Align ? Align : 1, AI);
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77
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173 }
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174 }
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175
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176 // Look for inline asm that clobbers the SP register.
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177 if (isa<CallInst>(I) || isa<InvokeInst>(I)) {
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100
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178 ImmutableCallSite CS(&*I);
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77
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179 if (isa<InlineAsm>(CS.getCalledValue())) {
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180 unsigned SP = TLI->getStackPointerRegisterToSaveRestore();
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181 const TargetRegisterInfo *TRI = MF->getSubtarget().getRegisterInfo();
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77
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182 std::vector<TargetLowering::AsmOperandInfo> Ops =
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183 TLI->ParseConstraints(Fn->getParent()->getDataLayout(), TRI, CS);
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184 for (size_t I = 0, E = Ops.size(); I != E; ++I) {
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185 TargetLowering::AsmOperandInfo &Op = Ops[I];
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186 if (Op.Type == InlineAsm::isClobber) {
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187 // Clobbers don't have SDValue operands, hence SDValue().
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188 TLI->ComputeConstraintToUse(Op, SDValue(), DAG);
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83
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189 std::pair<unsigned, const TargetRegisterClass *> PhysReg =
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95
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190 TLI->getRegForInlineAsmConstraint(TRI, Op.ConstraintCode,
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191 Op.ConstraintVT);
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77
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192 if (PhysReg.first == SP)
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120
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193 MF->getFrameInfo().setHasOpaqueSPAdjustment(true);
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77
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194 }
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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 // Look for calls to the @llvm.va_start intrinsic. We can omit some
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200 // prologue boilerplate for variadic functions that don't examine their
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201 // arguments.
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202 if (const auto *II = dyn_cast<IntrinsicInst>(I)) {
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203 if (II->getIntrinsicID() == Intrinsic::vastart)
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120
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204 MF->getFrameInfo().setHasVAStart(true);
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77
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205 }
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206
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100
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207 // If we have a musttail call in a variadic function, we need to ensure we
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77
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208 // forward implicit register parameters.
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209 if (const auto *CI = dyn_cast<CallInst>(I)) {
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210 if (CI->isMustTailCall() && Fn->isVarArg())
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120
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211 MF->getFrameInfo().setHasMustTailInVarArgFunc(true);
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77
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212 }
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213
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214 // Mark values used outside their block as exported, by allocating
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215 // a virtual register for them.
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100
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216 if (isUsedOutsideOfDefiningBlock(&*I))
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217 if (!isa<AllocaInst>(I) || !StaticAllocaMap.count(cast<AllocaInst>(I)))
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218 InitializeRegForValue(&*I);
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219
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220 // Collect llvm.dbg.declare information. This is done now instead of
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221 // during the initial isel pass through the IR so that it is done
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222 // in a predictable order.
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223 if (const DbgDeclareInst *DI = dyn_cast<DbgDeclareInst>(I)) {
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95
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224 assert(DI->getVariable() && "Missing variable");
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225 assert(DI->getDebugLoc() && "Missing location");
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226 if (MMI.hasDebugInfo()) {
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227 // Don't handle byval struct arguments or VLAs, for example.
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228 // Non-byval arguments are handled here (they refer to the stack
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229 // temporary alloca at this point).
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230 const Value *Address = DI->getAddress();
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231 if (Address) {
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232 if (const BitCastInst *BCI = dyn_cast<BitCastInst>(Address))
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parents:
diff
changeset
|
233 Address = BCI->getOperand(0);
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
234 if (const AllocaInst *AI = dyn_cast<AllocaInst>(Address)) {
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
235 DenseMap<const AllocaInst *, int>::iterator SI =
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
236 StaticAllocaMap.find(AI);
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
237 if (SI != StaticAllocaMap.end()) { // Check for VLAs.
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
238 int FI = SI->second;
|
|
83
|
239 MMI.setVariableDbgInfo(DI->getVariable(), DI->getExpression(),
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
240 FI, DI->getDebugLoc());
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
241 }
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
242 }
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
243 }
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
244 }
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
245 }
|
|
83
|
246
|
|
|
247 // Decide the preferred extend type for a value.
|
|
100
|
248 PreferredExtendType[&*I] = getPreferredExtendForValue(&*I);
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
249 }
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
250
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
251 // Create an initial MachineBasicBlock for each LLVM BasicBlock in F. This
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
252 // also creates the initial PHI MachineInstrs, though none of the input
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
253 // operands are populated.
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
254 for (BB = Fn->begin(); BB != EB; ++BB) {
|
|
95
|
255 // Don't create MachineBasicBlocks for imaginary EH pad blocks. These blocks
|
|
|
256 // are really data, and no instructions can live here.
|
|
|
257 if (BB->isEHPad()) {
|
|
|
258 const Instruction *I = BB->getFirstNonPHI();
|
|
100
|
259 // If this is a non-landingpad EH pad, mark this function as using
|
|
95
|
260 // funclets.
|
|
100
|
261 // FIXME: SEH catchpads do not create funclets, so we could avoid setting
|
|
|
262 // this in such cases in order to improve frame layout.
|
|
|
263 if (!isa<LandingPadInst>(I)) {
|
|
95
|
264 MMI.setHasEHFunclets(true);
|
|
120
|
265 MF->getFrameInfo().setHasOpaqueSPAdjustment(true);
|
|
100
|
266 }
|
|
|
267 if (isa<CatchSwitchInst>(I)) {
|
|
95
|
268 assert(&*BB->begin() == I &&
|
|
|
269 "WinEHPrepare failed to remove PHIs from imaginary BBs");
|
|
|
270 continue;
|
|
|
271 }
|
|
100
|
272 if (isa<FuncletPadInst>(I))
|
|
95
|
273 assert(&*BB->begin() == I && "WinEHPrepare failed to demote PHIs");
|
|
|
274 }
|
|
|
275
|
|
100
|
276 MachineBasicBlock *MBB = mf.CreateMachineBasicBlock(&*BB);
|
|
|
277 MBBMap[&*BB] = MBB;
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
278 MF->push_back(MBB);
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
279
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
280 // Transfer the address-taken flag. This is necessary because there could
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
281 // be multiple MachineBasicBlocks corresponding to one BasicBlock, and only
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
282 // the first one should be marked.
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
283 if (BB->hasAddressTaken())
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
284 MBB->setHasAddressTaken();
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
285
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
286 // Create Machine PHI nodes for LLVM PHI nodes, lowering them as
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
287 // appropriate.
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
288 for (BasicBlock::const_iterator I = BB->begin();
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
289 const PHINode *PN = dyn_cast<PHINode>(I); ++I) {
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
290 if (PN->use_empty()) continue;
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
291
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
292 // Skip empty types
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
293 if (PN->getType()->isEmptyTy())
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
294 continue;
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
295
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
296 DebugLoc DL = PN->getDebugLoc();
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
297 unsigned PHIReg = ValueMap[PN];
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
298 assert(PHIReg && "PHI node does not have an assigned virtual register!");
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
299
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
300 SmallVector<EVT, 4> ValueVTs;
|
|
95
|
301 ComputeValueVTs(*TLI, MF->getDataLayout(), PN->getType(), ValueVTs);
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
302 for (unsigned vti = 0, vte = ValueVTs.size(); vti != vte; ++vti) {
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
303 EVT VT = ValueVTs[vti];
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
304 unsigned NumRegisters = TLI->getNumRegisters(Fn->getContext(), VT);
|
|
77
|
305 const TargetInstrInfo *TII = MF->getSubtarget().getInstrInfo();
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
306 for (unsigned i = 0; i != NumRegisters; ++i)
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
307 BuildMI(MBB, DL, TII->get(TargetOpcode::PHI), PHIReg + i);
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
308 PHIReg += NumRegisters;
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
309 }
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
310 }
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
311 }
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
312
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
313 // Mark landing pad blocks.
|
|
95
|
314 SmallVector<const LandingPadInst *, 4> LPads;
|
|
|
315 for (BB = Fn->begin(); BB != EB; ++BB) {
|
|
|
316 const Instruction *FNP = BB->getFirstNonPHI();
|
|
100
|
317 if (BB->isEHPad() && MBBMap.count(&*BB))
|
|
|
318 MBBMap[&*BB]->setIsEHPad();
|
|
95
|
319 if (const auto *LPI = dyn_cast<LandingPadInst>(FNP))
|
|
|
320 LPads.push_back(LPI);
|
|
|
321 }
|
|
|
322
|
|
|
323 if (!isFuncletEHPersonality(Personality))
|
|
|
324 return;
|
|
|
325
|
|
100
|
326 WinEHFuncInfo &EHInfo = *MF->getWinEHFuncInfo();
|
|
95
|
327
|
|
|
328 // Map all BB references in the WinEH data to MBBs.
|
|
|
329 for (WinEHTryBlockMapEntry &TBME : EHInfo.TryBlockMap) {
|
|
|
330 for (WinEHHandlerType &H : TBME.HandlerArray) {
|
|
|
331 if (H.Handler)
|
|
|
332 H.Handler = MBBMap[H.Handler.get<const BasicBlock *>()];
|
|
|
333 }
|
|
|
334 }
|
|
|
335 for (CxxUnwindMapEntry &UME : EHInfo.CxxUnwindMap)
|
|
|
336 if (UME.Cleanup)
|
|
|
337 UME.Cleanup = MBBMap[UME.Cleanup.get<const BasicBlock *>()];
|
|
|
338 for (SEHUnwindMapEntry &UME : EHInfo.SEHUnwindMap) {
|
|
|
339 const BasicBlock *BB = UME.Handler.get<const BasicBlock *>();
|
|
|
340 UME.Handler = MBBMap[BB];
|
|
|
341 }
|
|
|
342 for (ClrEHUnwindMapEntry &CME : EHInfo.ClrEHUnwindMap) {
|
|
|
343 const BasicBlock *BB = CME.Handler.get<const BasicBlock *>();
|
|
|
344 CME.Handler = MBBMap[BB];
|
|
|
345 }
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
346 }
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
347
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
348 /// clear - Clear out all the function-specific state. This returns this
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
349 /// FunctionLoweringInfo to an empty state, ready to be used for a
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
350 /// different function.
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
351 void FunctionLoweringInfo::clear() {
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
352 MBBMap.clear();
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
353 ValueMap.clear();
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
354 StaticAllocaMap.clear();
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
355 LiveOutRegInfo.clear();
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
356 VisitedBBs.clear();
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
357 ArgDbgValues.clear();
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
358 ByValArgFrameIndexMap.clear();
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
359 RegFixups.clear();
|
|
83
|
360 StatepointStackSlots.clear();
|
|
120
|
361 StatepointSpillMaps.clear();
|
|
83
|
362 PreferredExtendType.clear();
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
363 }
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
364
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
365 /// CreateReg - Allocate a single virtual register for the given type.
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
366 unsigned FunctionLoweringInfo::CreateReg(MVT VT) {
|
|
77
|
367 return RegInfo->createVirtualRegister(
|
|
83
|
368 MF->getSubtarget().getTargetLowering()->getRegClassFor(VT));
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
369 }
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
370
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
371 /// CreateRegs - Allocate the appropriate number of virtual registers of
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
372 /// the correctly promoted or expanded types. Assign these registers
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
373 /// consecutive vreg numbers and return the first assigned number.
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
374 ///
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
375 /// In the case that the given value has struct or array type, this function
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
376 /// will assign registers for each member or element.
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
377 ///
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
378 unsigned FunctionLoweringInfo::CreateRegs(Type *Ty) {
|
|
83
|
379 const TargetLowering *TLI = MF->getSubtarget().getTargetLowering();
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
380
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
381 SmallVector<EVT, 4> ValueVTs;
|
|
95
|
382 ComputeValueVTs(*TLI, MF->getDataLayout(), Ty, ValueVTs);
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
383
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
384 unsigned FirstReg = 0;
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
385 for (unsigned Value = 0, e = ValueVTs.size(); Value != e; ++Value) {
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
386 EVT ValueVT = ValueVTs[Value];
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
387 MVT RegisterVT = TLI->getRegisterType(Ty->getContext(), ValueVT);
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
388
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
389 unsigned NumRegs = TLI->getNumRegisters(Ty->getContext(), ValueVT);
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
390 for (unsigned i = 0; i != NumRegs; ++i) {
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
391 unsigned R = CreateReg(RegisterVT);
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
392 if (!FirstReg) FirstReg = R;
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
393 }
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
394 }
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
395 return FirstReg;
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
396 }
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
397
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
398 /// GetLiveOutRegInfo - Gets LiveOutInfo for a register, returning NULL if the
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
399 /// register is a PHI destination and the PHI's LiveOutInfo is not valid. If
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
400 /// the register's LiveOutInfo is for a smaller bit width, it is extended to
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
401 /// the larger bit width by zero extension. The bit width must be no smaller
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
402 /// than the LiveOutInfo's existing bit width.
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
403 const FunctionLoweringInfo::LiveOutInfo *
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
404 FunctionLoweringInfo::GetLiveOutRegInfo(unsigned Reg, unsigned BitWidth) {
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
405 if (!LiveOutRegInfo.inBounds(Reg))
|
|
77
|
406 return nullptr;
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
407
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
408 LiveOutInfo *LOI = &LiveOutRegInfo[Reg];
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
409 if (!LOI->IsValid)
|
|
77
|
410 return nullptr;
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
411
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
412 if (BitWidth > LOI->KnownZero.getBitWidth()) {
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
413 LOI->NumSignBits = 1;
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
414 LOI->KnownZero = LOI->KnownZero.zextOrTrunc(BitWidth);
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
415 LOI->KnownOne = LOI->KnownOne.zextOrTrunc(BitWidth);
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
416 }
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
417
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
418 return LOI;
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
419 }
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
420
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
421 /// ComputePHILiveOutRegInfo - Compute LiveOutInfo for a PHI's destination
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
422 /// register based on the LiveOutInfo of its operands.
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
423 void FunctionLoweringInfo::ComputePHILiveOutRegInfo(const PHINode *PN) {
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
424 Type *Ty = PN->getType();
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
425 if (!Ty->isIntegerTy() || Ty->isVectorTy())
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
426 return;
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
427
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
428 SmallVector<EVT, 1> ValueVTs;
|
|
95
|
429 ComputeValueVTs(*TLI, MF->getDataLayout(), Ty, ValueVTs);
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
430 assert(ValueVTs.size() == 1 &&
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
431 "PHIs with non-vector integer types should have a single VT.");
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
432 EVT IntVT = ValueVTs[0];
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
433
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
434 if (TLI->getNumRegisters(PN->getContext(), IntVT) != 1)
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
435 return;
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
436 IntVT = TLI->getTypeToTransformTo(PN->getContext(), IntVT);
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
437 unsigned BitWidth = IntVT.getSizeInBits();
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
438
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
439 unsigned DestReg = ValueMap[PN];
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
440 if (!TargetRegisterInfo::isVirtualRegister(DestReg))
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
441 return;
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
442 LiveOutRegInfo.grow(DestReg);
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
443 LiveOutInfo &DestLOI = LiveOutRegInfo[DestReg];
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
444
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
445 Value *V = PN->getIncomingValue(0);
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
446 if (isa<UndefValue>(V) || isa<ConstantExpr>(V)) {
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
447 DestLOI.NumSignBits = 1;
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
448 APInt Zero(BitWidth, 0);
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
449 DestLOI.KnownZero = Zero;
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
450 DestLOI.KnownOne = Zero;
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
451 return;
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
452 }
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
453
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
454 if (ConstantInt *CI = dyn_cast<ConstantInt>(V)) {
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
455 APInt Val = CI->getValue().zextOrTrunc(BitWidth);
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
456 DestLOI.NumSignBits = Val.getNumSignBits();
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
457 DestLOI.KnownZero = ~Val;
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
458 DestLOI.KnownOne = Val;
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
459 } else {
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
460 assert(ValueMap.count(V) && "V should have been placed in ValueMap when its"
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
461 "CopyToReg node was created.");
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
462 unsigned SrcReg = ValueMap[V];
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
463 if (!TargetRegisterInfo::isVirtualRegister(SrcReg)) {
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
464 DestLOI.IsValid = false;
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
465 return;
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
466 }
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
467 const LiveOutInfo *SrcLOI = GetLiveOutRegInfo(SrcReg, BitWidth);
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
468 if (!SrcLOI) {
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
469 DestLOI.IsValid = false;
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
470 return;
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
471 }
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
472 DestLOI = *SrcLOI;
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
473 }
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
474
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
475 assert(DestLOI.KnownZero.getBitWidth() == BitWidth &&
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
476 DestLOI.KnownOne.getBitWidth() == BitWidth &&
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
477 "Masks should have the same bit width as the type.");
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
478
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
479 for (unsigned i = 1, e = PN->getNumIncomingValues(); i != e; ++i) {
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
480 Value *V = PN->getIncomingValue(i);
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
481 if (isa<UndefValue>(V) || isa<ConstantExpr>(V)) {
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
482 DestLOI.NumSignBits = 1;
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
483 APInt Zero(BitWidth, 0);
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
484 DestLOI.KnownZero = Zero;
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
485 DestLOI.KnownOne = Zero;
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
486 return;
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
487 }
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
488
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
489 if (ConstantInt *CI = dyn_cast<ConstantInt>(V)) {
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
490 APInt Val = CI->getValue().zextOrTrunc(BitWidth);
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
491 DestLOI.NumSignBits = std::min(DestLOI.NumSignBits, Val.getNumSignBits());
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
492 DestLOI.KnownZero &= ~Val;
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
493 DestLOI.KnownOne &= Val;
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
494 continue;
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
495 }
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
496
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
497 assert(ValueMap.count(V) && "V should have been placed in ValueMap when "
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
498 "its CopyToReg node was created.");
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
499 unsigned SrcReg = ValueMap[V];
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
500 if (!TargetRegisterInfo::isVirtualRegister(SrcReg)) {
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
501 DestLOI.IsValid = false;
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
502 return;
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
503 }
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
504 const LiveOutInfo *SrcLOI = GetLiveOutRegInfo(SrcReg, BitWidth);
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
505 if (!SrcLOI) {
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
506 DestLOI.IsValid = false;
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
507 return;
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
508 }
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
509 DestLOI.NumSignBits = std::min(DestLOI.NumSignBits, SrcLOI->NumSignBits);
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
510 DestLOI.KnownZero &= SrcLOI->KnownZero;
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
511 DestLOI.KnownOne &= SrcLOI->KnownOne;
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
512 }
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
513 }
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
514
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
515 /// setArgumentFrameIndex - Record frame index for the byval
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
516 /// argument. This overrides previous frame index entry for this argument,
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
517 /// if any.
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
518 void FunctionLoweringInfo::setArgumentFrameIndex(const Argument *A,
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
519 int FI) {
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
520 ByValArgFrameIndexMap[A] = FI;
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
521 }
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
522
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
523 /// getArgumentFrameIndex - Get frame index for the byval argument.
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
524 /// If the argument does not have any assigned frame index then 0 is
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
525 /// returned.
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
526 int FunctionLoweringInfo::getArgumentFrameIndex(const Argument *A) {
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
527 DenseMap<const Argument *, int>::iterator I =
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
528 ByValArgFrameIndexMap.find(A);
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
529 if (I != ByValArgFrameIndexMap.end())
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
530 return I->second;
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
531 DEBUG(dbgs() << "Argument does not have assigned frame index!\n");
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
532 return 0;
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
533 }
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
534
|
|
95
|
535 unsigned FunctionLoweringInfo::getCatchPadExceptionPointerVReg(
|
|
|
536 const Value *CPI, const TargetRegisterClass *RC) {
|
|
|
537 MachineRegisterInfo &MRI = MF->getRegInfo();
|
|
|
538 auto I = CatchPadExceptionPointers.insert({CPI, 0});
|
|
|
539 unsigned &VReg = I.first->second;
|
|
|
540 if (I.second)
|
|
|
541 VReg = MRI.createVirtualRegister(RC);
|
|
|
542 assert(VReg && "null vreg in exception pointer table!");
|
|
|
543 return VReg;
|
|
|
544 }
|
|
|
545
|
|
120
|
546 unsigned
|
|
|
547 FunctionLoweringInfo::getOrCreateSwiftErrorVReg(const MachineBasicBlock *MBB,
|
|
|
548 const Value *Val) {
|
|
|
549 auto Key = std::make_pair(MBB, Val);
|
|
|
550 auto It = SwiftErrorVRegDefMap.find(Key);
|
|
|
551 // If this is the first use of this swifterror value in this basic block,
|
|
|
552 // create a new virtual register.
|
|
|
553 // After we processed all basic blocks we will satisfy this "upwards exposed
|
|
|
554 // use" by inserting a copy or phi at the beginning of this block.
|
|
|
555 if (It == SwiftErrorVRegDefMap.end()) {
|
|
|
556 auto &DL = MF->getDataLayout();
|
|
|
557 const TargetRegisterClass *RC = TLI->getRegClassFor(TLI->getPointerTy(DL));
|
|
|
558 auto VReg = MF->getRegInfo().createVirtualRegister(RC);
|
|
|
559 SwiftErrorVRegDefMap[Key] = VReg;
|
|
|
560 SwiftErrorVRegUpwardsUse[Key] = VReg;
|
|
|
561 return VReg;
|
|
|
562 } else return It->second;
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
563 }
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
564
|
|
120
|
565 void FunctionLoweringInfo::setCurrentSwiftErrorVReg(
|
|
|
566 const MachineBasicBlock *MBB, const Value *Val, unsigned VReg) {
|
|
|
567 SwiftErrorVRegDefMap[std::make_pair(MBB, Val)] = VReg;
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
568 }
|
