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