1*81ad6265SDimitry Andric //===-- DirectXAsmPrinter.cpp - DirectX assembly writer --------*- C++ -*--===// 2*81ad6265SDimitry Andric // 3*81ad6265SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*81ad6265SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 5*81ad6265SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*81ad6265SDimitry Andric // 7*81ad6265SDimitry Andric //===----------------------------------------------------------------------===// 8*81ad6265SDimitry Andric // 9*81ad6265SDimitry Andric // This file contains AsmPrinters for the DirectX backend. 10*81ad6265SDimitry Andric // 11*81ad6265SDimitry Andric //===----------------------------------------------------------------------===// 12*81ad6265SDimitry Andric 13*81ad6265SDimitry Andric #include "TargetInfo/DirectXTargetInfo.h" 14*81ad6265SDimitry Andric #include "llvm/CodeGen/AsmPrinter.h" 15*81ad6265SDimitry Andric #include "llvm/IR/GlobalVariable.h" 16*81ad6265SDimitry Andric #include "llvm/IR/Module.h" 17*81ad6265SDimitry Andric #include "llvm/MC/MCStreamer.h" 18*81ad6265SDimitry Andric #include "llvm/MC/SectionKind.h" 19*81ad6265SDimitry Andric #include "llvm/MC/TargetRegistry.h" 20*81ad6265SDimitry Andric #include "llvm/Target/TargetLoweringObjectFile.h" 21*81ad6265SDimitry Andric 22*81ad6265SDimitry Andric using namespace llvm; 23*81ad6265SDimitry Andric 24*81ad6265SDimitry Andric #define DEBUG_TYPE "asm-printer" 25*81ad6265SDimitry Andric 26*81ad6265SDimitry Andric namespace { 27*81ad6265SDimitry Andric 28*81ad6265SDimitry Andric // The DXILAsmPrinter is mostly a stub because DXIL is just LLVM bitcode which 29*81ad6265SDimitry Andric // gets embedded into a DXContainer file. 30*81ad6265SDimitry Andric class DXILAsmPrinter : public AsmPrinter { 31*81ad6265SDimitry Andric public: 32*81ad6265SDimitry Andric explicit DXILAsmPrinter(TargetMachine &TM, 33*81ad6265SDimitry Andric std::unique_ptr<MCStreamer> Streamer) 34*81ad6265SDimitry Andric : AsmPrinter(TM, std::move(Streamer)) {} 35*81ad6265SDimitry Andric 36*81ad6265SDimitry Andric StringRef getPassName() const override { return "DXIL Assembly Printer"; } 37*81ad6265SDimitry Andric void emitGlobalVariable(const GlobalVariable *GV) override; 38*81ad6265SDimitry Andric bool runOnMachineFunction(MachineFunction &MF) override { return false; } 39*81ad6265SDimitry Andric }; 40*81ad6265SDimitry Andric } // namespace 41*81ad6265SDimitry Andric 42*81ad6265SDimitry Andric void DXILAsmPrinter::emitGlobalVariable(const GlobalVariable *GV) { 43*81ad6265SDimitry Andric // If there is no initializer or the section is implicit, do nothing 44*81ad6265SDimitry Andric if (!GV->hasInitializer() || GV->hasImplicitSection()) 45*81ad6265SDimitry Andric return; 46*81ad6265SDimitry Andric // Skip the LLVM metadata 47*81ad6265SDimitry Andric if (GV->getSection() == "llvm.metadata") 48*81ad6265SDimitry Andric return; 49*81ad6265SDimitry Andric SectionKind GVKind = TargetLoweringObjectFile::getKindForGlobal(GV, TM); 50*81ad6265SDimitry Andric MCSection *TheSection = getObjFileLowering().SectionForGlobal(GV, GVKind, TM); 51*81ad6265SDimitry Andric OutStreamer->switchSection(TheSection); 52*81ad6265SDimitry Andric emitGlobalConstant(GV->getParent()->getDataLayout(), GV->getInitializer()); 53*81ad6265SDimitry Andric } 54*81ad6265SDimitry Andric 55*81ad6265SDimitry Andric extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeDirectXAsmPrinter() { 56*81ad6265SDimitry Andric RegisterAsmPrinter<DXILAsmPrinter> X(getTheDirectXTarget()); 57*81ad6265SDimitry Andric } 58