1 //===- DirectXTargetMachine.cpp - DirectX Target Implementation -*- C++ -*-===// 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 /// \file 10 /// This file contains DirectX target initializer. 11 /// 12 //===----------------------------------------------------------------------===// 13 14 #include "DirectXTargetMachine.h" 15 #include "DXILIntrinsicExpansion.h" 16 #include "DXILOpLowering.h" 17 #include "DXILPrettyPrinter.h" 18 #include "DXILResourceAnalysis.h" 19 #include "DXILShaderFlags.h" 20 #include "DXILTranslateMetadata.h" 21 #include "DXILWriter/DXILWriterPass.h" 22 #include "DirectX.h" 23 #include "DirectXSubtarget.h" 24 #include "DirectXTargetTransformInfo.h" 25 #include "TargetInfo/DirectXTargetInfo.h" 26 #include "llvm/CodeGen/MachineModuleInfo.h" 27 #include "llvm/CodeGen/Passes.h" 28 #include "llvm/CodeGen/TargetPassConfig.h" 29 #include "llvm/IR/IRPrintingPasses.h" 30 #include "llvm/IR/LegacyPassManager.h" 31 #include "llvm/InitializePasses.h" 32 #include "llvm/MC/MCSectionDXContainer.h" 33 #include "llvm/MC/SectionKind.h" 34 #include "llvm/MC/TargetRegistry.h" 35 #include "llvm/Passes/PassBuilder.h" 36 #include "llvm/Support/CodeGen.h" 37 #include "llvm/Support/Compiler.h" 38 #include "llvm/Support/ErrorHandling.h" 39 #include "llvm/Target/TargetLoweringObjectFile.h" 40 #include "llvm/Transforms/Scalar/Scalarizer.h" 41 #include <optional> 42 43 using namespace llvm; 44 45 extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeDirectXTarget() { 46 RegisterTargetMachine<DirectXTargetMachine> X(getTheDirectXTarget()); 47 auto *PR = PassRegistry::getPassRegistry(); 48 initializeDXILIntrinsicExpansionLegacyPass(*PR); 49 initializeScalarizerLegacyPassPass(*PR); 50 initializeDXILPrepareModulePass(*PR); 51 initializeEmbedDXILPassPass(*PR); 52 initializeWriteDXILPassPass(*PR); 53 initializeDXContainerGlobalsPass(*PR); 54 initializeDXILOpLoweringLegacyPass(*PR); 55 initializeDXILTranslateMetadataLegacyPass(*PR); 56 initializeDXILResourceMDWrapperPass(*PR); 57 initializeShaderFlagsAnalysisWrapperPass(*PR); 58 initializeDXILFinalizeLinkageLegacyPass(*PR); 59 } 60 61 class DXILTargetObjectFile : public TargetLoweringObjectFile { 62 public: 63 DXILTargetObjectFile() = default; 64 65 MCSection *getExplicitSectionGlobal(const GlobalObject *GO, SectionKind Kind, 66 const TargetMachine &TM) const override { 67 return getContext().getDXContainerSection(GO->getSection(), Kind); 68 } 69 70 protected: 71 MCSection *SelectSectionForGlobal(const GlobalObject *GO, SectionKind Kind, 72 const TargetMachine &TM) const override { 73 llvm_unreachable("Not supported!"); 74 } 75 }; 76 77 class DirectXPassConfig : public TargetPassConfig { 78 public: 79 DirectXPassConfig(DirectXTargetMachine &TM, PassManagerBase &PM) 80 : TargetPassConfig(TM, PM) {} 81 82 DirectXTargetMachine &getDirectXTargetMachine() const { 83 return getTM<DirectXTargetMachine>(); 84 } 85 86 FunctionPass *createTargetRegisterAllocator(bool) override { return nullptr; } 87 void addCodeGenPrepare() override { 88 addPass(createDXILIntrinsicExpansionLegacyPass()); 89 ScalarizerPassOptions DxilScalarOptions; 90 DxilScalarOptions.ScalarizeLoadStore = true; 91 addPass(createScalarizerPass(DxilScalarOptions)); 92 addPass(createDXILOpLoweringLegacyPass()); 93 addPass(createDXILFinalizeLinkageLegacyPass()); 94 addPass(createDXILTranslateMetadataLegacyPass()); 95 addPass(createDXILPrepareModulePass()); 96 } 97 }; 98 99 DirectXTargetMachine::DirectXTargetMachine(const Target &T, const Triple &TT, 100 StringRef CPU, StringRef FS, 101 const TargetOptions &Options, 102 std::optional<Reloc::Model> RM, 103 std::optional<CodeModel::Model> CM, 104 CodeGenOptLevel OL, bool JIT) 105 : LLVMTargetMachine(T, 106 "e-m:e-p:32:32-i1:32-i8:8-i16:16-i32:32-i64:64-f16:16-" 107 "f32:32-f64:64-n8:16:32:64", 108 TT, CPU, FS, Options, Reloc::Static, CodeModel::Small, 109 OL), 110 TLOF(std::make_unique<DXILTargetObjectFile>()), 111 Subtarget(std::make_unique<DirectXSubtarget>(TT, CPU, FS, *this)) { 112 initAsmInfo(); 113 } 114 115 DirectXTargetMachine::~DirectXTargetMachine() {} 116 117 void DirectXTargetMachine::registerPassBuilderCallbacks(PassBuilder &PB) { 118 #define GET_PASS_REGISTRY "DirectXPassRegistry.def" 119 #include "llvm/Passes/TargetPassRegistry.inc" 120 } 121 122 bool DirectXTargetMachine::addPassesToEmitFile( 123 PassManagerBase &PM, raw_pwrite_stream &Out, raw_pwrite_stream *DwoOut, 124 CodeGenFileType FileType, bool DisableVerify, 125 MachineModuleInfoWrapperPass *MMIWP) { 126 TargetPassConfig *PassConfig = createPassConfig(PM); 127 PassConfig->addCodeGenPrepare(); 128 129 switch (FileType) { 130 case CodeGenFileType::AssemblyFile: 131 PM.add(createDXILPrettyPrinterLegacyPass(Out)); 132 PM.add(createPrintModulePass(Out, "", true)); 133 break; 134 case CodeGenFileType::ObjectFile: 135 if (TargetPassConfig::willCompleteCodeGenPipeline()) { 136 PM.add(createDXILEmbedderPass()); 137 // We embed the other DXContainer globals after embedding DXIL so that the 138 // globals don't pollute the DXIL. 139 PM.add(createDXContainerGlobalsPass()); 140 141 if (!MMIWP) 142 MMIWP = new MachineModuleInfoWrapperPass(this); 143 PM.add(MMIWP); 144 if (addAsmPrinter(PM, Out, DwoOut, FileType, 145 MMIWP->getMMI().getContext())) 146 return true; 147 } else 148 PM.add(createDXILWriterPass(Out)); 149 break; 150 case CodeGenFileType::Null: 151 break; 152 } 153 return false; 154 } 155 156 bool DirectXTargetMachine::addPassesToEmitMC(PassManagerBase &PM, 157 MCContext *&Ctx, 158 raw_pwrite_stream &Out, 159 bool DisableVerify) { 160 return true; 161 } 162 163 TargetPassConfig *DirectXTargetMachine::createPassConfig(PassManagerBase &PM) { 164 return new DirectXPassConfig(*this, PM); 165 } 166 167 const DirectXSubtarget * 168 DirectXTargetMachine::getSubtargetImpl(const Function &) const { 169 return Subtarget.get(); 170 } 171 172 TargetTransformInfo 173 DirectXTargetMachine::getTargetTransformInfo(const Function &F) const { 174 return TargetTransformInfo(DirectXTTIImpl(this, F)); 175 } 176 177 DirectXTargetLowering::DirectXTargetLowering(const DirectXTargetMachine &TM, 178 const DirectXSubtarget &STI) 179 : TargetLowering(TM) {} 180