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 "DXILResourceAnalysis.h" 16 #include "DXILShaderFlags.h" 17 #include "DXILWriter/DXILWriterPass.h" 18 #include "DirectX.h" 19 #include "DirectXSubtarget.h" 20 #include "DirectXTargetTransformInfo.h" 21 #include "TargetInfo/DirectXTargetInfo.h" 22 #include "llvm/CodeGen/MachineModuleInfo.h" 23 #include "llvm/CodeGen/Passes.h" 24 #include "llvm/CodeGen/TargetPassConfig.h" 25 #include "llvm/IR/IRPrintingPasses.h" 26 #include "llvm/IR/LegacyPassManager.h" 27 #include "llvm/MC/MCSectionDXContainer.h" 28 #include "llvm/MC/SectionKind.h" 29 #include "llvm/MC/TargetRegistry.h" 30 #include "llvm/Passes/PassBuilder.h" 31 #include "llvm/Support/CodeGen.h" 32 #include "llvm/Support/Compiler.h" 33 #include "llvm/Support/ErrorHandling.h" 34 #include "llvm/Target/TargetLoweringObjectFile.h" 35 #include <optional> 36 37 using namespace llvm; 38 39 extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeDirectXTarget() { 40 RegisterTargetMachine<DirectXTargetMachine> X(getTheDirectXTarget()); 41 auto *PR = PassRegistry::getPassRegistry(); 42 initializeDXILPrepareModulePass(*PR); 43 initializeEmbedDXILPassPass(*PR); 44 initializeWriteDXILPassPass(*PR); 45 initializeDXILOpLoweringLegacyPass(*PR); 46 initializeDXILTranslateMetadataPass(*PR); 47 initializeDXILResourceWrapperPass(*PR); 48 initializeShaderFlagsAnalysisWrapperPass(*PR); 49 } 50 51 class DXILTargetObjectFile : public TargetLoweringObjectFile { 52 public: 53 DXILTargetObjectFile() = default; 54 55 MCSection *getExplicitSectionGlobal(const GlobalObject *GO, SectionKind Kind, 56 const TargetMachine &TM) const override { 57 return getContext().getDXContainerSection(GO->getSection(), Kind); 58 } 59 60 protected: 61 MCSection *SelectSectionForGlobal(const GlobalObject *GO, SectionKind Kind, 62 const TargetMachine &TM) const override { 63 llvm_unreachable("Not supported!"); 64 } 65 }; 66 67 class DirectXPassConfig : public TargetPassConfig { 68 public: 69 DirectXPassConfig(DirectXTargetMachine &TM, PassManagerBase &PM) 70 : TargetPassConfig(TM, PM) {} 71 72 DirectXTargetMachine &getDirectXTargetMachine() const { 73 return getTM<DirectXTargetMachine>(); 74 } 75 76 FunctionPass *createTargetRegisterAllocator(bool) override { return nullptr; } 77 void addCodeGenPrepare() override { 78 addPass(createDXILOpLoweringLegacyPass()); 79 addPass(createDXILPrepareModulePass()); 80 addPass(createDXILTranslateMetadataPass()); 81 } 82 }; 83 84 DirectXTargetMachine::DirectXTargetMachine(const Target &T, const Triple &TT, 85 StringRef CPU, StringRef FS, 86 const TargetOptions &Options, 87 std::optional<Reloc::Model> RM, 88 std::optional<CodeModel::Model> CM, 89 CodeGenOpt::Level OL, bool JIT) 90 : LLVMTargetMachine(T, 91 "e-m:e-p:32:32-i1:32-i8:8-i16:16-i32:32-i64:64-f16:16-" 92 "f32:32-f64:64-n8:16:32:64", 93 TT, CPU, FS, Options, Reloc::Static, CodeModel::Small, 94 OL), 95 TLOF(std::make_unique<DXILTargetObjectFile>()), 96 Subtarget(std::make_unique<DirectXSubtarget>(TT, CPU, FS, *this)) { 97 initAsmInfo(); 98 } 99 100 DirectXTargetMachine::~DirectXTargetMachine() {} 101 102 void DirectXTargetMachine::registerPassBuilderCallbacks(PassBuilder &PB) { 103 PB.registerPipelineParsingCallback( 104 [](StringRef PassName, ModulePassManager &PM, 105 ArrayRef<PassBuilder::PipelineElement>) { 106 if (PassName == "print-dxil-resource") { 107 PM.addPass(DXILResourcePrinterPass(dbgs())); 108 return true; 109 } 110 if (PassName == "print-dx-shader-flags") { 111 PM.addPass(dxil::ShaderFlagsAnalysisPrinter(dbgs())); 112 return true; 113 } 114 return false; 115 }); 116 117 PB.registerAnalysisRegistrationCallback([](ModuleAnalysisManager &MAM) { 118 MAM.registerPass([&] { return DXILResourceAnalysis(); }); 119 MAM.registerPass([&] { return dxil::ShaderFlagsAnalysis(); }); 120 }); 121 } 122 123 bool DirectXTargetMachine::addPassesToEmitFile( 124 PassManagerBase &PM, raw_pwrite_stream &Out, raw_pwrite_stream *DwoOut, 125 CodeGenFileType FileType, bool DisableVerify, 126 MachineModuleInfoWrapperPass *MMIWP) { 127 TargetPassConfig *PassConfig = createPassConfig(PM); 128 PassConfig->addCodeGenPrepare(); 129 130 if (TargetPassConfig::willCompleteCodeGenPipeline()) { 131 PM.add(createDXILEmbedderPass()); 132 // We embed the other DXContainer globals after embedding DXIL so that the 133 // globals don't pollute the DXIL. 134 PM.add(createDXContainerGlobalsPass()); 135 } 136 switch (FileType) { 137 case CGFT_AssemblyFile: 138 PM.add(createDXILPrettyPrinterPass(Out)); 139 PM.add(createPrintModulePass(Out, "", true)); 140 break; 141 case CGFT_ObjectFile: 142 if (TargetPassConfig::willCompleteCodeGenPipeline()) { 143 if (!MMIWP) 144 MMIWP = new MachineModuleInfoWrapperPass(this); 145 PM.add(MMIWP); 146 if (addAsmPrinter(PM, Out, DwoOut, FileType, 147 MMIWP->getMMI().getContext())) 148 return true; 149 } else 150 PM.add(createDXILWriterPass(Out)); 151 break; 152 case CGFT_Null: 153 break; 154 } 155 return false; 156 } 157 158 bool DirectXTargetMachine::addPassesToEmitMC(PassManagerBase &PM, 159 MCContext *&Ctx, 160 raw_pwrite_stream &Out, 161 bool DisableVerify) { 162 return true; 163 } 164 165 TargetPassConfig *DirectXTargetMachine::createPassConfig(PassManagerBase &PM) { 166 return new DirectXPassConfig(*this, PM); 167 } 168 169 const DirectXSubtarget * 170 DirectXTargetMachine::getSubtargetImpl(const Function &) const { 171 return Subtarget.get(); 172 } 173 174 TargetTransformInfo 175 DirectXTargetMachine::getTargetTransformInfo(const Function &F) const { 176 return TargetTransformInfo(DirectXTTIImpl(this, F)); 177 } 178 179 DirectXTargetLowering::DirectXTargetLowering(const DirectXTargetMachine &TM, 180 const DirectXSubtarget &STI) 181 : TargetLowering(TM) {} 182