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/GISelKnownBits.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 34using namespace llvm; 35using namespace MIPatternMatch; 36 37namespace { 38#define GET_GICOMBINER_TYPES 39#include "MipsGenPostLegalizeGICombiner.inc" 40#undef GET_GICOMBINER_TYPES 41 42class MipsPostLegalizerCombinerImpl : public Combiner { 43protected: 44 const MipsPostLegalizerCombinerImplRuleConfig &RuleConfig; 45 const MipsSubtarget &STI; 46 // TODO: Make CombinerHelper methods const. 47 mutable CombinerHelper Helper; 48 49public: 50 MipsPostLegalizerCombinerImpl( 51 MachineFunction &MF, CombinerInfo &CInfo, const TargetPassConfig *TPC, 52 GISelKnownBits &KB, GISelCSEInfo *CSEInfo, 53 const MipsPostLegalizerCombinerImplRuleConfig &RuleConfig, 54 const MipsSubtarget &STI, MachineDominatorTree *MDT, 55 const LegalizerInfo *LI); 56 57 static const char *getName() { return "MipsPostLegalizerCombiner"; } 58 59 bool tryCombineAll(MachineInstr &I) const override; 60 61private: 62#define GET_GICOMBINER_CLASS_MEMBERS 63#include "MipsGenPostLegalizeGICombiner.inc" 64#undef GET_GICOMBINER_CLASS_MEMBERS 65}; 66 67#define GET_GICOMBINER_IMPL 68#include "MipsGenPostLegalizeGICombiner.inc" 69#undef GET_GICOMBINER_IMPL 70 71MipsPostLegalizerCombinerImpl::MipsPostLegalizerCombinerImpl( 72 MachineFunction &MF, CombinerInfo &CInfo, const TargetPassConfig *TPC, 73 GISelKnownBits &KB, GISelCSEInfo *CSEInfo, 74 const MipsPostLegalizerCombinerImplRuleConfig &RuleConfig, 75 const MipsSubtarget &STI, MachineDominatorTree *MDT, 76 const LegalizerInfo *LI) 77 : Combiner(MF, CInfo, TPC, &KB, CSEInfo), RuleConfig(RuleConfig), STI(STI), 78 Helper(Observer, B, /*IsPreLegalize*/ false, &KB, MDT, LI), 79#define GET_GICOMBINER_CONSTRUCTOR_INITS 80#include "MipsGenPostLegalizeGICombiner.inc" 81#undef GET_GICOMBINER_CONSTRUCTOR_INITS 82{ 83} 84 85// Pass boilerplate 86// ================ 87 88class MipsPostLegalizerCombiner : public MachineFunctionPass { 89public: 90 static char ID; 91 92 MipsPostLegalizerCombiner(bool IsOptNone = false); 93 94 StringRef getPassName() const override { return "MipsPostLegalizerCombiner"; } 95 96 bool runOnMachineFunction(MachineFunction &MF) override; 97 98 void getAnalysisUsage(AnalysisUsage &AU) const override; 99 100private: 101 bool IsOptNone; 102 MipsPostLegalizerCombinerImplRuleConfig RuleConfig; 103}; 104} // end anonymous namespace 105 106void MipsPostLegalizerCombiner::getAnalysisUsage(AnalysisUsage &AU) const { 107 AU.addRequired<TargetPassConfig>(); 108 AU.setPreservesCFG(); 109 getSelectionDAGFallbackAnalysisUsage(AU); 110 AU.addRequired<GISelKnownBitsAnalysis>(); 111 AU.addPreserved<GISelKnownBitsAnalysis>(); 112 if (!IsOptNone) { 113 AU.addRequired<MachineDominatorTree>(); 114 AU.addPreserved<MachineDominatorTree>(); 115 } 116 MachineFunctionPass::getAnalysisUsage(AU); 117} 118 119MipsPostLegalizerCombiner::MipsPostLegalizerCombiner(bool IsOptNone) 120 : MachineFunctionPass(ID), IsOptNone(IsOptNone) { 121 initializeMipsPostLegalizerCombinerPass(*PassRegistry::getPassRegistry()); 122 123 if (!RuleConfig.parseCommandLineOption()) 124 report_fatal_error("Invalid rule identifier"); 125} 126 127bool MipsPostLegalizerCombiner::runOnMachineFunction(MachineFunction &MF) { 128 if (MF.getProperties().hasProperty( 129 MachineFunctionProperties::Property::FailedISel)) 130 return false; 131 auto *TPC = &getAnalysis<TargetPassConfig>(); 132 const Function &F = MF.getFunction(); 133 bool EnableOpt = 134 MF.getTarget().getOptLevel() != CodeGenOptLevel::None && !skipFunction(F); 135 136 const MipsSubtarget &ST = MF.getSubtarget<MipsSubtarget>(); 137 const MipsLegalizerInfo *LI = 138 static_cast<const MipsLegalizerInfo *>(ST.getLegalizerInfo()); 139 140 GISelKnownBits *KB = &getAnalysis<GISelKnownBitsAnalysis>().get(MF); 141 MachineDominatorTree *MDT = 142 IsOptNone ? nullptr : &getAnalysis<MachineDominatorTree>(); 143 CombinerInfo CInfo(/*AllowIllegalOps*/ false, /*ShouldLegalizeIllegal*/ true, 144 LI, EnableOpt, F.hasOptSize(), F.hasMinSize()); 145 MipsPostLegalizerCombinerImpl Impl(MF, CInfo, TPC, *KB, /*CSEInfo*/ nullptr, 146 RuleConfig, ST, MDT, LI); 147 return Impl.combineMachineInstrs(); 148} 149 150char MipsPostLegalizerCombiner::ID = 0; 151INITIALIZE_PASS_BEGIN(MipsPostLegalizerCombiner, DEBUG_TYPE, 152 "Combine Mips machine instrs after legalization", false, 153 false) 154INITIALIZE_PASS_DEPENDENCY(TargetPassConfig) 155INITIALIZE_PASS_DEPENDENCY(GISelKnownBitsAnalysis) 156INITIALIZE_PASS_END(MipsPostLegalizerCombiner, DEBUG_TYPE, 157 "Combine Mips machine instrs after legalization", false, 158 false) 159 160namespace llvm { 161FunctionPass *createMipsPostLegalizeCombiner(bool IsOptNone) { 162 return new MipsPostLegalizerCombiner(IsOptNone); 163} 164} // end namespace llvm 165