1 //=== lib/CodeGen/GlobalISel/MipsPostLegalizerCombiner.cpp ----------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // This pass does combining of machine instructions at the generic MI level, 10 // after the legalizer. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #include "MCTargetDesc/MipsMCTargetDesc.h" 15 #include "Mips.h" 16 #include "MipsLegalizerInfo.h" 17 #include "MipsSubtarget.h" 18 #include "llvm/CodeGen/GlobalISel/Combiner.h" 19 #include "llvm/CodeGen/GlobalISel/CombinerHelper.h" 20 #include "llvm/CodeGen/GlobalISel/CombinerInfo.h" 21 #include "llvm/CodeGen/GlobalISel/GIMatchTableExecutorImpl.h" 22 #include "llvm/CodeGen/GlobalISel/GISelValueTracking.h" 23 #include "llvm/CodeGen/GlobalISel/MIPatternMatch.h" 24 #include "llvm/CodeGen/MachineDominators.h" 25 #include "llvm/CodeGen/TargetPassConfig.h" 26 #include "llvm/Target/TargetMachine.h" 27 28 #define GET_GICOMBINER_DEPS 29 #include "MipsGenPostLegalizeGICombiner.inc" 30 #undef GET_GICOMBINER_DEPS 31 32 #define DEBUG_TYPE "mips-postlegalizer-combiner" 33 34 using namespace llvm; 35 using namespace MIPatternMatch; 36 37 namespace { 38 #define GET_GICOMBINER_TYPES 39 #include "MipsGenPostLegalizeGICombiner.inc" 40 #undef GET_GICOMBINER_TYPES 41 42 class MipsPostLegalizerCombinerImpl : public Combiner { 43 protected: 44 const MipsPostLegalizerCombinerImplRuleConfig &RuleConfig; 45 const MipsSubtarget &STI; 46 const CombinerHelper Helper; 47 48 public: 49 MipsPostLegalizerCombinerImpl( 50 MachineFunction &MF, CombinerInfo &CInfo, const TargetPassConfig *TPC, 51 GISelValueTracking &VT, GISelCSEInfo *CSEInfo, 52 const MipsPostLegalizerCombinerImplRuleConfig &RuleConfig, 53 const MipsSubtarget &STI, MachineDominatorTree *MDT, 54 const LegalizerInfo *LI); 55 56 static const char *getName() { return "MipsPostLegalizerCombiner"; } 57 58 bool tryCombineAll(MachineInstr &I) const override; 59 60 private: 61 #define GET_GICOMBINER_CLASS_MEMBERS 62 #include "MipsGenPostLegalizeGICombiner.inc" 63 #undef GET_GICOMBINER_CLASS_MEMBERS 64 }; 65 66 #define GET_GICOMBINER_IMPL 67 #include "MipsGenPostLegalizeGICombiner.inc" 68 #undef GET_GICOMBINER_IMPL 69 70 MipsPostLegalizerCombinerImpl::MipsPostLegalizerCombinerImpl( 71 MachineFunction &MF, CombinerInfo &CInfo, const TargetPassConfig *TPC, 72 GISelValueTracking &VT, GISelCSEInfo *CSEInfo, 73 const MipsPostLegalizerCombinerImplRuleConfig &RuleConfig, 74 const MipsSubtarget &STI, MachineDominatorTree *MDT, 75 const LegalizerInfo *LI) 76 : Combiner(MF, CInfo, TPC, &VT, CSEInfo), RuleConfig(RuleConfig), STI(STI), 77 Helper(Observer, B, /*IsPreLegalize*/ false, &VT, MDT, LI), 78 #define GET_GICOMBINER_CONSTRUCTOR_INITS 79 #include "MipsGenPostLegalizeGICombiner.inc" 80 #undef GET_GICOMBINER_CONSTRUCTOR_INITS 81 { 82 } 83 84 // Pass boilerplate 85 // ================ 86 87 class MipsPostLegalizerCombiner : public MachineFunctionPass { 88 public: 89 static char ID; 90 91 MipsPostLegalizerCombiner(bool IsOptNone = false); 92 93 StringRef getPassName() const override { return "MipsPostLegalizerCombiner"; } 94 95 bool runOnMachineFunction(MachineFunction &MF) override; 96 97 void getAnalysisUsage(AnalysisUsage &AU) const override; 98 99 private: 100 bool IsOptNone; 101 MipsPostLegalizerCombinerImplRuleConfig RuleConfig; 102 }; 103 } // end anonymous namespace 104 105 void MipsPostLegalizerCombiner::getAnalysisUsage(AnalysisUsage &AU) const { 106 AU.addRequired<TargetPassConfig>(); 107 AU.setPreservesCFG(); 108 getSelectionDAGFallbackAnalysisUsage(AU); 109 AU.addRequired<GISelValueTrackingAnalysisLegacy>(); 110 AU.addPreserved<GISelValueTrackingAnalysisLegacy>(); 111 if (!IsOptNone) { 112 AU.addRequired<MachineDominatorTreeWrapperPass>(); 113 AU.addPreserved<MachineDominatorTreeWrapperPass>(); 114 } 115 MachineFunctionPass::getAnalysisUsage(AU); 116 } 117 118 MipsPostLegalizerCombiner::MipsPostLegalizerCombiner(bool IsOptNone) 119 : MachineFunctionPass(ID), IsOptNone(IsOptNone) { 120 if (!RuleConfig.parseCommandLineOption()) 121 report_fatal_error("Invalid rule identifier"); 122 } 123 124 bool MipsPostLegalizerCombiner::runOnMachineFunction(MachineFunction &MF) { 125 if (MF.getProperties().hasFailedISel()) 126 return false; 127 auto *TPC = &getAnalysis<TargetPassConfig>(); 128 const Function &F = MF.getFunction(); 129 bool EnableOpt = 130 MF.getTarget().getOptLevel() != CodeGenOptLevel::None && !skipFunction(F); 131 132 const MipsSubtarget &ST = MF.getSubtarget<MipsSubtarget>(); 133 const MipsLegalizerInfo *LI = 134 static_cast<const MipsLegalizerInfo *>(ST.getLegalizerInfo()); 135 136 GISelValueTracking *VT = 137 &getAnalysis<GISelValueTrackingAnalysisLegacy>().get(MF); 138 MachineDominatorTree *MDT = 139 IsOptNone ? nullptr 140 : &getAnalysis<MachineDominatorTreeWrapperPass>().getDomTree(); 141 CombinerInfo CInfo(/*AllowIllegalOps*/ false, /*ShouldLegalizeIllegal*/ true, 142 LI, EnableOpt, F.hasOptSize(), F.hasMinSize()); 143 MipsPostLegalizerCombinerImpl Impl(MF, CInfo, TPC, *VT, /*CSEInfo*/ nullptr, 144 RuleConfig, ST, MDT, LI); 145 return Impl.combineMachineInstrs(); 146 } 147 148 char MipsPostLegalizerCombiner::ID = 0; 149 INITIALIZE_PASS_BEGIN(MipsPostLegalizerCombiner, DEBUG_TYPE, 150 "Combine Mips machine instrs after legalization", false, 151 false) 152 INITIALIZE_PASS_DEPENDENCY(TargetPassConfig) 153 INITIALIZE_PASS_DEPENDENCY(GISelValueTrackingAnalysisLegacy) 154 INITIALIZE_PASS_END(MipsPostLegalizerCombiner, DEBUG_TYPE, 155 "Combine Mips machine instrs after legalization", false, 156 false) 157 158 FunctionPass *llvm::createMipsPostLegalizeCombiner(bool IsOptNone) { 159 return new MipsPostLegalizerCombiner(IsOptNone); 160 } 161