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 "DXILWriter/DXILWriterPass.h" 16 #include "DirectX.h" 17 #include "DirectXSubtarget.h" 18 #include "DirectXTargetTransformInfo.h" 19 #include "TargetInfo/DirectXTargetInfo.h" 20 #include "llvm/CodeGen/Passes.h" 21 #include "llvm/CodeGen/TargetPassConfig.h" 22 #include "llvm/IR/IRPrintingPasses.h" 23 #include "llvm/IR/LegacyPassManager.h" 24 #include "llvm/MC/SectionKind.h" 25 #include "llvm/MC/TargetRegistry.h" 26 #include "llvm/Support/CodeGen.h" 27 #include "llvm/Support/Compiler.h" 28 #include "llvm/Support/ErrorHandling.h" 29 #include "llvm/Target/TargetLoweringObjectFile.h" 30 31 using namespace llvm; 32 33 extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeDirectXTarget() { 34 RegisterTargetMachine<DirectXTargetMachine> X(getTheDirectXTarget()); 35 auto *PR = PassRegistry::getPassRegistry(); 36 initializeDXILPrepareModulePass(*PR); 37 } 38 39 class DXILTargetObjectFile : public TargetLoweringObjectFile { 40 public: 41 DXILTargetObjectFile() = default; 42 43 MCSection *getExplicitSectionGlobal(const GlobalObject *GO, SectionKind Kind, 44 const TargetMachine &TM) const override { 45 llvm_unreachable("Not supported!"); 46 } 47 48 protected: 49 MCSection *SelectSectionForGlobal(const GlobalObject *GO, SectionKind Kind, 50 const TargetMachine &TM) const override { 51 llvm_unreachable("Not supported!"); 52 } 53 }; 54 55 class DirectXPassConfig : public TargetPassConfig { 56 public: 57 DirectXPassConfig(DirectXTargetMachine &TM, PassManagerBase &PM) 58 : TargetPassConfig(TM, PM) {} 59 60 DirectXTargetMachine &getDirectXTargetMachine() const { 61 return getTM<DirectXTargetMachine>(); 62 } 63 64 FunctionPass *createTargetRegisterAllocator(bool) override { return nullptr; } 65 }; 66 67 DirectXTargetMachine::DirectXTargetMachine(const Target &T, const Triple &TT, 68 StringRef CPU, StringRef FS, 69 const TargetOptions &Options, 70 Optional<Reloc::Model> RM, 71 Optional<CodeModel::Model> CM, 72 CodeGenOpt::Level OL, bool JIT) 73 : LLVMTargetMachine(T, 74 "e-m:e-p:32:32-i1:32-i8:8-i16:16-i32:32-i64:64-f16:16-" 75 "f32:32-f64:64-n8:16:32:64", 76 TT, CPU, FS, Options, Reloc::Static, CodeModel::Small, 77 OL), 78 TLOF(std::make_unique<DXILTargetObjectFile>()), 79 Subtarget(std::make_unique<DirectXSubtarget>(TT, CPU, FS, *this)) {} 80 81 DirectXTargetMachine::~DirectXTargetMachine() {} 82 83 bool DirectXTargetMachine::addPassesToEmitFile( 84 PassManagerBase &PM, raw_pwrite_stream &Out, raw_pwrite_stream *DwoOut, 85 CodeGenFileType FileType, bool DisableVerify, 86 MachineModuleInfoWrapperPass *MMIWP) { 87 PM.add(createDXILPrepareModulePass()); 88 switch (FileType) { 89 case CGFT_AssemblyFile: 90 PM.add(createPrintModulePass(Out, "", true)); 91 break; 92 case CGFT_ObjectFile: 93 // TODO: Use MC Object streamer to write DXContainer 94 PM.add(createDXILWriterPass(Out)); 95 break; 96 case CGFT_Null: 97 break; 98 } 99 return false; 100 } 101 102 bool DirectXTargetMachine::addPassesToEmitMC(PassManagerBase &PM, 103 MCContext *&Ctx, 104 raw_pwrite_stream &Out, 105 bool DisableVerify) { 106 return true; 107 } 108 109 TargetPassConfig *DirectXTargetMachine::createPassConfig(PassManagerBase &PM) { 110 return new DirectXPassConfig(*this, PM); 111 } 112 113 const DirectXSubtarget * 114 DirectXTargetMachine::getSubtargetImpl(const Function &) const { 115 return Subtarget.get(); 116 } 117 118 TargetTransformInfo 119 DirectXTargetMachine::getTargetTransformInfo(const Function &F) const { 120 return TargetTransformInfo(DirectXTTIImpl(this, F)); 121 } 122 123 DirectXTargetLowering::DirectXTargetLowering(const DirectXTargetMachine &TM, 124 const DirectXSubtarget &STI) 125 : TargetLowering(TM) {} 126