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