110 lines
3.4 KiB
C++
110 lines
3.4 KiB
C++
//===- DXILWriterPass.cpp - Bitcode writing pass --------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// DXILWriterPass implementation.
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//
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//===----------------------------------------------------------------------===//
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#include "DXILWriterPass.h"
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#include "DXILBitcodeWriter.h"
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/Analysis/ModuleSummaryAnalysis.h"
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#include "llvm/IR/Constants.h"
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#include "llvm/IR/GlobalVariable.h"
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#include "llvm/IR/Module.h"
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#include "llvm/IR/PassManager.h"
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#include "llvm/InitializePasses.h"
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#include "llvm/Pass.h"
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#include "llvm/Support/Alignment.h"
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#include "llvm/Transforms/Utils/ModuleUtils.h"
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using namespace llvm;
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using namespace llvm::dxil;
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namespace {
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class WriteDXILPass : public llvm::ModulePass {
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raw_ostream &OS; // raw_ostream to print on
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public:
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static char ID; // Pass identification, replacement for typeid
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WriteDXILPass() : ModulePass(ID), OS(dbgs()) {
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initializeWriteDXILPassPass(*PassRegistry::getPassRegistry());
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}
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explicit WriteDXILPass(raw_ostream &o) : ModulePass(ID), OS(o) {
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initializeWriteDXILPassPass(*PassRegistry::getPassRegistry());
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}
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StringRef getPassName() const override { return "Bitcode Writer"; }
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bool runOnModule(Module &M) override {
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WriteDXILToFile(M, OS);
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return false;
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}
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void getAnalysisUsage(AnalysisUsage &AU) const override {
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AU.setPreservesAll();
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}
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};
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class EmbedDXILPass : public llvm::ModulePass {
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public:
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static char ID; // Pass identification, replacement for typeid
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EmbedDXILPass() : ModulePass(ID) {
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initializeEmbedDXILPassPass(*PassRegistry::getPassRegistry());
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}
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StringRef getPassName() const override { return "DXIL Embedder"; }
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bool runOnModule(Module &M) override {
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std::string Data;
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llvm::raw_string_ostream OS(Data);
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const std::string OriginalTriple = M.getTargetTriple();
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// Set to DXIL triple when write to bitcode.
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// Only the output bitcode need to be DXIL triple.
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M.setTargetTriple("dxil-ms-dx");
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WriteDXILToFile(M, OS);
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// Recover triple.
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M.setTargetTriple(OriginalTriple);
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Constant *ModuleConstant =
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ConstantDataArray::get(M.getContext(), arrayRefFromStringRef(Data));
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auto *GV = new llvm::GlobalVariable(M, ModuleConstant->getType(), true,
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GlobalValue::PrivateLinkage,
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ModuleConstant, "dx.dxil");
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GV->setSection("DXIL");
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GV->setAlignment(Align(4));
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appendToCompilerUsed(M, {GV});
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return true;
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}
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void getAnalysisUsage(AnalysisUsage &AU) const override {
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AU.setPreservesAll();
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}
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};
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} // namespace
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char WriteDXILPass::ID = 0;
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INITIALIZE_PASS_BEGIN(WriteDXILPass, "write-bitcode", "Write Bitcode", false,
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true)
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INITIALIZE_PASS_DEPENDENCY(ModuleSummaryIndexWrapperPass)
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INITIALIZE_PASS_END(WriteDXILPass, "write-bitcode", "Write Bitcode", false,
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true)
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ModulePass *llvm::createDXILWriterPass(raw_ostream &Str) {
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return new WriteDXILPass(Str);
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}
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char EmbedDXILPass::ID = 0;
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INITIALIZE_PASS(EmbedDXILPass, "dxil-embed", "Embed DXIL", false, true)
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ModulePass *llvm::createDXILEmbedderPass() { return new EmbedDXILPass(); }
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