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