181ad6265SDimitry Andric //===-- DirectXAsmPrinter.cpp - DirectX assembly writer --------*- C++ -*--===// 281ad6265SDimitry Andric // 381ad6265SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 481ad6265SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 581ad6265SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 681ad6265SDimitry Andric // 781ad6265SDimitry Andric //===----------------------------------------------------------------------===// 881ad6265SDimitry Andric // 981ad6265SDimitry Andric // This file contains AsmPrinters for the DirectX backend. 1081ad6265SDimitry Andric // 1181ad6265SDimitry Andric //===----------------------------------------------------------------------===// 1281ad6265SDimitry Andric 1381ad6265SDimitry Andric #include "TargetInfo/DirectXTargetInfo.h" 1481ad6265SDimitry Andric #include "llvm/CodeGen/AsmPrinter.h" 1581ad6265SDimitry Andric #include "llvm/IR/GlobalVariable.h" 1681ad6265SDimitry Andric #include "llvm/IR/Module.h" 1781ad6265SDimitry Andric #include "llvm/MC/MCStreamer.h" 1881ad6265SDimitry Andric #include "llvm/MC/SectionKind.h" 1981ad6265SDimitry Andric #include "llvm/MC/TargetRegistry.h" 2081ad6265SDimitry Andric #include "llvm/Target/TargetLoweringObjectFile.h" 2181ad6265SDimitry Andric 2281ad6265SDimitry Andric using namespace llvm; 2381ad6265SDimitry Andric 2481ad6265SDimitry Andric #define DEBUG_TYPE "asm-printer" 2581ad6265SDimitry Andric 2681ad6265SDimitry Andric namespace { 2781ad6265SDimitry Andric 2881ad6265SDimitry Andric // The DXILAsmPrinter is mostly a stub because DXIL is just LLVM bitcode which 2981ad6265SDimitry Andric // gets embedded into a DXContainer file. 3081ad6265SDimitry Andric class DXILAsmPrinter : public AsmPrinter { 3181ad6265SDimitry Andric public: 3281ad6265SDimitry Andric explicit DXILAsmPrinter(TargetMachine &TM, 3381ad6265SDimitry Andric std::unique_ptr<MCStreamer> Streamer) 3481ad6265SDimitry Andric : AsmPrinter(TM, std::move(Streamer)) {} 3581ad6265SDimitry Andric 3681ad6265SDimitry Andric StringRef getPassName() const override { return "DXIL Assembly Printer"; } 3781ad6265SDimitry Andric void emitGlobalVariable(const GlobalVariable *GV) override; 3881ad6265SDimitry Andric bool runOnMachineFunction(MachineFunction &MF) override { return false; } 3981ad6265SDimitry Andric }; 4081ad6265SDimitry Andric } // namespace 4181ad6265SDimitry Andric 4281ad6265SDimitry Andric void DXILAsmPrinter::emitGlobalVariable(const GlobalVariable *GV) { 43bdd1243dSDimitry Andric // If there is no initializer, or no explicit section do nothing 44bdd1243dSDimitry Andric if (!GV->hasInitializer() || GV->hasImplicitSection() || !GV->hasSection()) 4581ad6265SDimitry Andric return; 4681ad6265SDimitry Andric // Skip the LLVM metadata 4781ad6265SDimitry Andric if (GV->getSection() == "llvm.metadata") 4881ad6265SDimitry Andric return; 4981ad6265SDimitry Andric SectionKind GVKind = TargetLoweringObjectFile::getKindForGlobal(GV, TM); 5081ad6265SDimitry Andric MCSection *TheSection = getObjFileLowering().SectionForGlobal(GV, GVKind, TM); 5181ad6265SDimitry Andric OutStreamer->switchSection(TheSection); 52*0fca6ea1SDimitry Andric emitGlobalConstant(GV->getDataLayout(), GV->getInitializer()); 5381ad6265SDimitry Andric } 5481ad6265SDimitry Andric 5581ad6265SDimitry Andric extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeDirectXAsmPrinter() { 5681ad6265SDimitry Andric RegisterAsmPrinter<DXILAsmPrinter> X(getTheDirectXTarget()); 5781ad6265SDimitry Andric } 58