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 initializeDXContainerGlobalsPass(*PR); 46 initializeDXILOpLoweringLegacyPass(*PR); 47 initializeDXILTranslateMetadataPass(*PR); 48 initializeDXILResourceWrapperPass(*PR); 49 initializeShaderFlagsAnalysisWrapperPass(*PR); 50 } 51 52 class DXILTargetObjectFile : public TargetLoweringObjectFile { 53 public: 54 DXILTargetObjectFile() = default; 55 56 MCSection *getExplicitSectionGlobal(const GlobalObject *GO, SectionKind Kind, 57 const TargetMachine &TM) const override { 58 return getContext().getDXContainerSection(GO->getSection(), Kind); 59 } 60 61 protected: 62 MCSection *SelectSectionForGlobal(const GlobalObject *GO, SectionKind Kind, 63 const TargetMachine &TM) const override { 64 llvm_unreachable("Not supported!"); 65 } 66 }; 67 68 class DirectXPassConfig : public TargetPassConfig { 69 public: 70 DirectXPassConfig(DirectXTargetMachine &TM, PassManagerBase &PM) 71 : TargetPassConfig(TM, PM) {} 72 73 DirectXTargetMachine &getDirectXTargetMachine() const { 74 return getTM<DirectXTargetMachine>(); 75 } 76 77 FunctionPass *createTargetRegisterAllocator(bool) override { return nullptr; } 78 void addCodeGenPrepare() override { 79 addPass(createDXILOpLoweringLegacyPass()); 80 addPass(createDXILPrepareModulePass()); 81 addPass(createDXILTranslateMetadataPass()); 82 } 83 }; 84 85 DirectXTargetMachine::DirectXTargetMachine(const Target &T, const Triple &TT, 86 StringRef CPU, StringRef FS, 87 const TargetOptions &Options, 88 std::optional<Reloc::Model> RM, 89 std::optional<CodeModel::Model> CM, 90 CodeGenOptLevel OL, bool JIT) 91 : LLVMTargetMachine(T, 92 "e-m:e-p:32:32-i1:32-i8:8-i16:16-i32:32-i64:64-f16:16-" 93 "f32:32-f64:64-n8:16:32:64", 94 TT, CPU, FS, Options, Reloc::Static, CodeModel::Small, 95 OL), 96 TLOF(std::make_unique<DXILTargetObjectFile>()), 97 Subtarget(std::make_unique<DirectXSubtarget>(TT, CPU, FS, *this)) { 98 initAsmInfo(); 99 } 100 101 DirectXTargetMachine::~DirectXTargetMachine() {} 102 103 void DirectXTargetMachine::registerPassBuilderCallbacks(PassBuilder &PB) { 104 PB.registerPipelineParsingCallback( 105 [](StringRef PassName, ModulePassManager &PM, 106 ArrayRef<PassBuilder::PipelineElement>) { 107 if (PassName == "print-dxil-resource") { 108 PM.addPass(DXILResourcePrinterPass(dbgs())); 109 return true; 110 } 111 if (PassName == "print-dx-shader-flags") { 112 PM.addPass(dxil::ShaderFlagsAnalysisPrinter(dbgs())); 113 return true; 114 } 115 return false; 116 }); 117 118 PB.registerAnalysisRegistrationCallback([](ModuleAnalysisManager &MAM) { 119 MAM.registerPass([&] { return DXILResourceAnalysis(); }); 120 MAM.registerPass([&] { return dxil::ShaderFlagsAnalysis(); }); 121 }); 122 } 123 124 bool DirectXTargetMachine::addPassesToEmitFile( 125 PassManagerBase &PM, raw_pwrite_stream &Out, raw_pwrite_stream *DwoOut, 126 CodeGenFileType FileType, bool DisableVerify, 127 MachineModuleInfoWrapperPass *MMIWP) { 128 TargetPassConfig *PassConfig = createPassConfig(PM); 129 PassConfig->addCodeGenPrepare(); 130 131 switch (FileType) { 132 case CodeGenFileType::AssemblyFile: 133 PM.add(createDXILPrettyPrinterPass(Out)); 134 PM.add(createPrintModulePass(Out, "", true)); 135 break; 136 case CodeGenFileType::ObjectFile: 137 if (TargetPassConfig::willCompleteCodeGenPipeline()) { 138 PM.add(createDXILEmbedderPass()); 139 // We embed the other DXContainer globals after embedding DXIL so that the 140 // globals don't pollute the DXIL. 141 PM.add(createDXContainerGlobalsPass()); 142 143 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 CodeGenFileType::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