1*d415bd75Srobert //===-- DirectXAsmPrinter.cpp - DirectX assembly writer --------*- C++ -*--===// 2*d415bd75Srobert // 3*d415bd75Srobert // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*d415bd75Srobert // See https://llvm.org/LICENSE.txt for license information. 5*d415bd75Srobert // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*d415bd75Srobert // 7*d415bd75Srobert //===----------------------------------------------------------------------===// 8*d415bd75Srobert // 9*d415bd75Srobert // This file contains AsmPrinters for the DirectX backend. 10*d415bd75Srobert // 11*d415bd75Srobert //===----------------------------------------------------------------------===// 12*d415bd75Srobert 13*d415bd75Srobert #include "TargetInfo/DirectXTargetInfo.h" 14*d415bd75Srobert #include "llvm/CodeGen/AsmPrinter.h" 15*d415bd75Srobert #include "llvm/IR/GlobalVariable.h" 16*d415bd75Srobert #include "llvm/IR/Module.h" 17*d415bd75Srobert #include "llvm/MC/MCStreamer.h" 18*d415bd75Srobert #include "llvm/MC/SectionKind.h" 19*d415bd75Srobert #include "llvm/MC/TargetRegistry.h" 20*d415bd75Srobert #include "llvm/Target/TargetLoweringObjectFile.h" 21*d415bd75Srobert 22*d415bd75Srobert using namespace llvm; 23*d415bd75Srobert 24*d415bd75Srobert #define DEBUG_TYPE "asm-printer" 25*d415bd75Srobert 26*d415bd75Srobert namespace { 27*d415bd75Srobert 28*d415bd75Srobert // The DXILAsmPrinter is mostly a stub because DXIL is just LLVM bitcode which 29*d415bd75Srobert // gets embedded into a DXContainer file. 30*d415bd75Srobert class DXILAsmPrinter : public AsmPrinter { 31*d415bd75Srobert public: DXILAsmPrinter(TargetMachine & TM,std::unique_ptr<MCStreamer> Streamer)32*d415bd75Srobert explicit DXILAsmPrinter(TargetMachine &TM, 33*d415bd75Srobert std::unique_ptr<MCStreamer> Streamer) 34*d415bd75Srobert : AsmPrinter(TM, std::move(Streamer)) {} 35*d415bd75Srobert getPassName() const36*d415bd75Srobert StringRef getPassName() const override { return "DXIL Assembly Printer"; } 37*d415bd75Srobert void emitGlobalVariable(const GlobalVariable *GV) override; runOnMachineFunction(MachineFunction & MF)38*d415bd75Srobert bool runOnMachineFunction(MachineFunction &MF) override { return false; } 39*d415bd75Srobert }; 40*d415bd75Srobert } // namespace 41*d415bd75Srobert emitGlobalVariable(const GlobalVariable * GV)42*d415bd75Srobertvoid DXILAsmPrinter::emitGlobalVariable(const GlobalVariable *GV) { 43*d415bd75Srobert // If there is no initializer, or no explicit section do nothing 44*d415bd75Srobert if (!GV->hasInitializer() || GV->hasImplicitSection() || !GV->hasSection()) 45*d415bd75Srobert return; 46*d415bd75Srobert // Skip the LLVM metadata 47*d415bd75Srobert if (GV->getSection() == "llvm.metadata") 48*d415bd75Srobert return; 49*d415bd75Srobert SectionKind GVKind = TargetLoweringObjectFile::getKindForGlobal(GV, TM); 50*d415bd75Srobert MCSection *TheSection = getObjFileLowering().SectionForGlobal(GV, GVKind, TM); 51*d415bd75Srobert OutStreamer->switchSection(TheSection); 52*d415bd75Srobert emitGlobalConstant(GV->getParent()->getDataLayout(), GV->getInitializer()); 53*d415bd75Srobert } 54*d415bd75Srobert LLVMInitializeDirectXAsmPrinter()55*d415bd75Srobertextern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeDirectXAsmPrinter() { 56*d415bd75Srobert RegisterAsmPrinter<DXILAsmPrinter> X(getTheDirectXTarget()); 57*d415bd75Srobert } 58