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annotate lib/CodeGen/MachineInstrBundle.cpp @ 128:c347d3398279 default tip

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fix
author mir3636
date Wed, 06 Dec 2017 14:37:17 +0900
parents 1172e4bd9c6f
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 //===-- lib/CodeGen/MachineInstrBundle.cpp --------------------------------===//
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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 #include "llvm/CodeGen/MachineInstrBundle.h"
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11 #include "llvm/ADT/SmallSet.h"
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12 #include "llvm/ADT/SmallVector.h"
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13 #include "llvm/CodeGen/MachineFunctionPass.h"
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14 #include "llvm/CodeGen/MachineInstrBuilder.h"
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15 #include "llvm/CodeGen/Passes.h"
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16 #include "llvm/Target/TargetInstrInfo.h"
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17 #include "llvm/Target/TargetMachine.h"
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18 #include "llvm/Target/TargetRegisterInfo.h"
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19 #include "llvm/Target/TargetSubtargetInfo.h"
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20 #include <utility>
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21 using namespace llvm;
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22
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23 namespace {
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24 class UnpackMachineBundles : public MachineFunctionPass {
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25 public:
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26 static char ID; // Pass identification
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27 UnpackMachineBundles(
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28 std::function<bool(const MachineFunction &)> Ftor = nullptr)
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29 : MachineFunctionPass(ID), PredicateFtor(std::move(Ftor)) {
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30 initializeUnpackMachineBundlesPass(*PassRegistry::getPassRegistry());
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31 }
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32
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33 bool runOnMachineFunction(MachineFunction &MF) override;
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34
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35 private:
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36 std::function<bool(const MachineFunction &)> PredicateFtor;
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37 };
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38 } // end anonymous namespace
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39
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40 char UnpackMachineBundles::ID = 0;
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41 char &llvm::UnpackMachineBundlesID = UnpackMachineBundles::ID;
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42 INITIALIZE_PASS(UnpackMachineBundles, "unpack-mi-bundles",
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43 "Unpack machine instruction bundles", false, false)
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44
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45 bool UnpackMachineBundles::runOnMachineFunction(MachineFunction &MF) {
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46 if (PredicateFtor && !PredicateFtor(MF))
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47 return false;
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48
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49 bool Changed = false;
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50 for (MachineFunction::iterator I = MF.begin(), E = MF.end(); I != E; ++I) {
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51 MachineBasicBlock *MBB = &*I;
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52
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53 for (MachineBasicBlock::instr_iterator MII = MBB->instr_begin(),
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54 MIE = MBB->instr_end(); MII != MIE; ) {
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55 MachineInstr *MI = &*MII;
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56
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57 // Remove BUNDLE instruction and the InsideBundle flags from bundled
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58 // instructions.
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59 if (MI->isBundle()) {
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60 while (++MII != MIE && MII->isBundledWithPred()) {
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61 MII->unbundleFromPred();
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62 for (unsigned i = 0, e = MII->getNumOperands(); i != e; ++i) {
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63 MachineOperand &MO = MII->getOperand(i);
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64 if (MO.isReg() && MO.isInternalRead())
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65 MO.setIsInternalRead(false);
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66 }
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67 }
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68 MI->eraseFromParent();
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69
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70 Changed = true;
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71 continue;
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72 }
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73
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74 ++MII;
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75 }
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76 }
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78 return Changed;
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79 }
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81 FunctionPass *
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82 llvm::createUnpackMachineBundles(
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83 std::function<bool(const MachineFunction &)> Ftor) {
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84 return new UnpackMachineBundles(std::move(Ftor));
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85 }
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86
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87 namespace {
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88 class FinalizeMachineBundles : public MachineFunctionPass {
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89 public:
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90 static char ID; // Pass identification
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91 FinalizeMachineBundles() : MachineFunctionPass(ID) {
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92 initializeFinalizeMachineBundlesPass(*PassRegistry::getPassRegistry());
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93 }
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94
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95 bool runOnMachineFunction(MachineFunction &MF) override;
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96 };
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97 } // end anonymous namespace
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98
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99 char FinalizeMachineBundles::ID = 0;
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100 char &llvm::FinalizeMachineBundlesID = FinalizeMachineBundles::ID;
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101 INITIALIZE_PASS(FinalizeMachineBundles, "finalize-mi-bundles",
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102 "Finalize machine instruction bundles", false, false)
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103
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104 bool FinalizeMachineBundles::runOnMachineFunction(MachineFunction &MF) {
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105 return llvm::finalizeBundles(MF);
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106 }
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107
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108
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109 /// finalizeBundle - Finalize a machine instruction bundle which includes
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110 /// a sequence of instructions starting from FirstMI to LastMI (exclusive).
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111 /// This routine adds a BUNDLE instruction to represent the bundle, it adds
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112 /// IsInternalRead markers to MachineOperands which are defined inside the
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113 /// bundle, and it copies externally visible defs and uses to the BUNDLE
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114 /// instruction.
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115 void llvm::finalizeBundle(MachineBasicBlock &MBB,
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116 MachineBasicBlock::instr_iterator FirstMI,
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117 MachineBasicBlock::instr_iterator LastMI) {
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118 assert(FirstMI != LastMI && "Empty bundle?");
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119 MIBundleBuilder Bundle(MBB, FirstMI, LastMI);
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120
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121 MachineFunction &MF = *MBB.getParent();
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122 const TargetInstrInfo *TII = MF.getSubtarget().getInstrInfo();
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123 const TargetRegisterInfo *TRI = MF.getSubtarget().getRegisterInfo();
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124
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125 MachineInstrBuilder MIB =
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126 BuildMI(MF, FirstMI->getDebugLoc(), TII->get(TargetOpcode::BUNDLE));
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127 Bundle.prepend(MIB);
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128
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129 SmallVector<unsigned, 32> LocalDefs;
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130 SmallSet<unsigned, 32> LocalDefSet;
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131 SmallSet<unsigned, 8> DeadDefSet;
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diff changeset
132 SmallSet<unsigned, 16> KilledDefSet;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
133 SmallVector<unsigned, 8> ExternUses;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
134 SmallSet<unsigned, 8> ExternUseSet;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
135 SmallSet<unsigned, 8> KilledUseSet;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
136 SmallSet<unsigned, 8> UndefUseSet;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
137 SmallVector<MachineOperand*, 4> Defs;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
138 for (; FirstMI != LastMI; ++FirstMI) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
139 for (unsigned i = 0, e = FirstMI->getNumOperands(); i != e; ++i) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
140 MachineOperand &MO = FirstMI->getOperand(i);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
141 if (!MO.isReg())
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
142 continue;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
143 if (MO.isDef()) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
144 Defs.push_back(&MO);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
145 continue;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
146 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
147
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
148 unsigned Reg = MO.getReg();
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
149 if (!Reg)
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
150 continue;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
151 assert(TargetRegisterInfo::isPhysicalRegister(Reg));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
152 if (LocalDefSet.count(Reg)) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
153 MO.setIsInternalRead();
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
154 if (MO.isKill())
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
155 // Internal def is now killed.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
156 KilledDefSet.insert(Reg);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
157 } else {
83
60c9769439b8 LLVM 3.7
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents: 77
diff changeset
158 if (ExternUseSet.insert(Reg).second) {
0
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
159 ExternUses.push_back(Reg);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
160 if (MO.isUndef())
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
161 UndefUseSet.insert(Reg);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
162 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
163 if (MO.isKill())
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
164 // External def is now killed.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
165 KilledUseSet.insert(Reg);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
166 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
167 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
168
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
169 for (unsigned i = 0, e = Defs.size(); i != e; ++i) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
170 MachineOperand &MO = *Defs[i];
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
171 unsigned Reg = MO.getReg();
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
172 if (!Reg)
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
173 continue;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
174
83
60c9769439b8 LLVM 3.7
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents: 77
diff changeset
175 if (LocalDefSet.insert(Reg).second) {
0
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
176 LocalDefs.push_back(Reg);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
177 if (MO.isDead()) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
178 DeadDefSet.insert(Reg);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
179 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
180 } else {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
181 // Re-defined inside the bundle, it's no longer killed.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
182 KilledDefSet.erase(Reg);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
183 if (!MO.isDead())
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
184 // Previously defined but dead.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
185 DeadDefSet.erase(Reg);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
186 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
187
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
188 if (!MO.isDead()) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
189 for (MCSubRegIterator SubRegs(Reg, TRI); SubRegs.isValid(); ++SubRegs) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
190 unsigned SubReg = *SubRegs;
83
60c9769439b8 LLVM 3.7
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents: 77
diff changeset
191 if (LocalDefSet.insert(SubReg).second)
0
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
192 LocalDefs.push_back(SubReg);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
193 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
194 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
195 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
196
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
197 Defs.clear();
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
198 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
199
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
200 SmallSet<unsigned, 32> Added;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
201 for (unsigned i = 0, e = LocalDefs.size(); i != e; ++i) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
202 unsigned Reg = LocalDefs[i];
83
60c9769439b8 LLVM 3.7
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents: 77
diff changeset
203 if (Added.insert(Reg).second) {
0
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
204 // If it's not live beyond end of the bundle, mark it dead.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
205 bool isDead = DeadDefSet.count(Reg) || KilledDefSet.count(Reg);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
206 MIB.addReg(Reg, getDefRegState(true) | getDeadRegState(isDead) |
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
207 getImplRegState(true));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
208 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
209 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
210
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
211 for (unsigned i = 0, e = ExternUses.size(); i != e; ++i) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
212 unsigned Reg = ExternUses[i];
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
213 bool isKill = KilledUseSet.count(Reg);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
214 bool isUndef = UndefUseSet.count(Reg);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
215 MIB.addReg(Reg, getKillRegState(isKill) | getUndefRegState(isUndef) |
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
216 getImplRegState(true));
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
217 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
218 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
219
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
220 /// finalizeBundle - Same functionality as the previous finalizeBundle except
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
221 /// the last instruction in the bundle is not provided as an input. This is
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
222 /// used in cases where bundles are pre-determined by marking instructions
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
223 /// with 'InsideBundle' marker. It returns the MBB instruction iterator that
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
224 /// points to the end of the bundle.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
225 MachineBasicBlock::instr_iterator
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
226 llvm::finalizeBundle(MachineBasicBlock &MBB,
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
227 MachineBasicBlock::instr_iterator FirstMI) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
228 MachineBasicBlock::instr_iterator E = MBB.instr_end();
77
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents: 0
diff changeset
229 MachineBasicBlock::instr_iterator LastMI = std::next(FirstMI);
0
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
230 while (LastMI != E && LastMI->isInsideBundle())
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
231 ++LastMI;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
232 finalizeBundle(MBB, FirstMI, LastMI);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
233 return LastMI;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
234 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
235
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
236 /// finalizeBundles - Finalize instruction bundles in the specified
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
237 /// MachineFunction. Return true if any bundles are finalized.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
238 bool llvm::finalizeBundles(MachineFunction &MF) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
239 bool Changed = false;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
240 for (MachineFunction::iterator I = MF.begin(), E = MF.end(); I != E; ++I) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
241 MachineBasicBlock &MBB = *I;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
242 MachineBasicBlock::instr_iterator MII = MBB.instr_begin();
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
243 MachineBasicBlock::instr_iterator MIE = MBB.instr_end();
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
244 if (MII == MIE)
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
245 continue;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
246 assert(!MII->isInsideBundle() &&
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
247 "First instr cannot be inside bundle before finalization!");
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
248
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
249 for (++MII; MII != MIE; ) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
250 if (!MII->isInsideBundle())
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
251 ++MII;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
252 else {
77
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents: 0
diff changeset
253 MII = finalizeBundle(MBB, std::prev(MII));
0
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
254 Changed = true;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
255 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
256 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
257 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
258
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
259 return Changed;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
260 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
261
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
262 //===----------------------------------------------------------------------===//
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
263 // MachineOperand iterator
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
264 //===----------------------------------------------------------------------===//
95c75e76d11b LLVM 3.4
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parents:
diff changeset
265
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
266 MachineOperandIteratorBase::VirtRegInfo
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
267 MachineOperandIteratorBase::analyzeVirtReg(unsigned Reg,
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
268 SmallVectorImpl<std::pair<MachineInstr*, unsigned> > *Ops) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
269 VirtRegInfo RI = { false, false, false };
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
270 for(; isValid(); ++*this) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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diff changeset
271 MachineOperand &MO = deref();
95c75e76d11b LLVM 3.4
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diff changeset
272 if (!MO.isReg() || MO.getReg() != Reg)
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
273 continue;
95c75e76d11b LLVM 3.4
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diff changeset
274
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diff changeset
275 // Remember each (MI, OpNo) that refers to Reg.
95c75e76d11b LLVM 3.4
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diff changeset
276 if (Ops)
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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diff changeset
277 Ops->push_back(std::make_pair(MO.getParent(), getOperandNo()));
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278
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279 // Both defs and uses can read virtual registers.
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diff changeset
280 if (MO.readsReg()) {
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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diff changeset
281 RI.Reads = true;
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
282 if (MO.isDef())
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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diff changeset
283 RI.Tied = true;
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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diff changeset
284 }
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diff changeset
285
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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286 // Only defs can write.
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diff changeset
287 if (MO.isDef())
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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diff changeset
288 RI.Writes = true;
95c75e76d11b LLVM 3.4
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parents:
diff changeset
289 else if (!RI.Tied && MO.getParent()->isRegTiedToDefOperand(getOperandNo()))
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
290 RI.Tied = true;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
291 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
292 return RI;
95c75e76d11b LLVM 3.4
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parents:
diff changeset
293 }
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diff changeset
294
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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295 MachineOperandIteratorBase::PhysRegInfo
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
296 MachineOperandIteratorBase::analyzePhysReg(unsigned Reg,
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
297 const TargetRegisterInfo *TRI) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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298 bool AllDefsDead = true;
120
1172e4bd9c6f update 4.0.0
mir3636
parents: 100
diff changeset
299 PhysRegInfo PRI = {false, false, false, false, false, false, false, false};
0
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
300
95c75e76d11b LLVM 3.4
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parents:
diff changeset
301 assert(TargetRegisterInfo::isPhysicalRegister(Reg) &&
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
302 "analyzePhysReg not given a physical register!");
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
303 for (; isValid(); ++*this) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
304 MachineOperand &MO = deref();
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
305
100
7d135dc70f03 LLVM 3.9
Miyagi Mitsuki <e135756@ie.u-ryukyu.ac.jp>
parents: 95
diff changeset
306 if (MO.isRegMask() && MO.clobbersPhysReg(Reg)) {
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Miyagi Mitsuki <e135756@ie.u-ryukyu.ac.jp>
parents: 95
diff changeset
307 PRI.Clobbered = true;
7d135dc70f03 LLVM 3.9
Miyagi Mitsuki <e135756@ie.u-ryukyu.ac.jp>
parents: 95
diff changeset
308 continue;
7d135dc70f03 LLVM 3.9
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parents: 95
diff changeset
309 }
0
95c75e76d11b LLVM 3.4
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parents:
diff changeset
310
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
311 if (!MO.isReg())
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
312 continue;
95c75e76d11b LLVM 3.4
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parents:
diff changeset
313
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
314 unsigned MOReg = MO.getReg();
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
315 if (!MOReg || !TargetRegisterInfo::isPhysicalRegister(MOReg))
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
316 continue;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
317
100
7d135dc70f03 LLVM 3.9
Miyagi Mitsuki <e135756@ie.u-ryukyu.ac.jp>
parents: 95
diff changeset
318 if (!TRI->regsOverlap(MOReg, Reg))
0
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
319 continue;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
320
100
7d135dc70f03 LLVM 3.9
Miyagi Mitsuki <e135756@ie.u-ryukyu.ac.jp>
parents: 95
diff changeset
321 bool Covered = TRI->isSuperRegisterEq(Reg, MOReg);
7d135dc70f03 LLVM 3.9
Miyagi Mitsuki <e135756@ie.u-ryukyu.ac.jp>
parents: 95
diff changeset
322 if (MO.readsReg()) {
7d135dc70f03 LLVM 3.9
Miyagi Mitsuki <e135756@ie.u-ryukyu.ac.jp>
parents: 95
diff changeset
323 PRI.Read = true;
7d135dc70f03 LLVM 3.9
Miyagi Mitsuki <e135756@ie.u-ryukyu.ac.jp>
parents: 95
diff changeset
324 if (Covered) {
7d135dc70f03 LLVM 3.9
Miyagi Mitsuki <e135756@ie.u-ryukyu.ac.jp>
parents: 95
diff changeset
325 PRI.FullyRead = true;
7d135dc70f03 LLVM 3.9
Miyagi Mitsuki <e135756@ie.u-ryukyu.ac.jp>
parents: 95
diff changeset
326 if (MO.isKill())
7d135dc70f03 LLVM 3.9
Miyagi Mitsuki <e135756@ie.u-ryukyu.ac.jp>
parents: 95
diff changeset
327 PRI.Killed = true;
7d135dc70f03 LLVM 3.9
Miyagi Mitsuki <e135756@ie.u-ryukyu.ac.jp>
parents: 95
diff changeset
328 }
7d135dc70f03 LLVM 3.9
Miyagi Mitsuki <e135756@ie.u-ryukyu.ac.jp>
parents: 95
diff changeset
329 } else if (MO.isDef()) {
7d135dc70f03 LLVM 3.9
Miyagi Mitsuki <e135756@ie.u-ryukyu.ac.jp>
parents: 95
diff changeset
330 PRI.Defined = true;
7d135dc70f03 LLVM 3.9
Miyagi Mitsuki <e135756@ie.u-ryukyu.ac.jp>
parents: 95
diff changeset
331 if (Covered)
7d135dc70f03 LLVM 3.9
Miyagi Mitsuki <e135756@ie.u-ryukyu.ac.jp>
parents: 95
diff changeset
332 PRI.FullyDefined = true;
0
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
333 if (!MO.isDead())
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
334 AllDefsDead = false;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
335 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
336 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
337
120
1172e4bd9c6f update 4.0.0
mir3636
parents: 100
diff changeset
338 if (AllDefsDead) {
1172e4bd9c6f update 4.0.0
mir3636
parents: 100
diff changeset
339 if (PRI.FullyDefined || PRI.Clobbered)
1172e4bd9c6f update 4.0.0
mir3636
parents: 100
diff changeset
340 PRI.DeadDef = true;
1172e4bd9c6f update 4.0.0
mir3636
parents: 100
diff changeset
341 else if (PRI.Defined)
1172e4bd9c6f update 4.0.0
mir3636
parents: 100
diff changeset
342 PRI.PartialDeadDef = true;
1172e4bd9c6f update 4.0.0
mir3636
parents: 100
diff changeset
343 }
0
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
344
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
345 return PRI;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
346 }