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 |