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//===- DirectXTargetMachine.cpp - DirectX Target Implementation -*- C++ -*-===//
//
// 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
//
//===----------------------------------------------------------------------===//
///
/// \file
/// This file contains DirectX target initializer.
///
//===----------------------------------------------------------------------===//
#include "DirectXTargetMachine.h"
#include "DXILResourceAnalysis.h"
#include "DXILShaderFlags.h"
#include "DXILWriter/DXILWriterPass.h"
#include "DirectX.h"
#include "DirectXSubtarget.h"
#include "DirectXTargetTransformInfo.h"
#include "TargetInfo/DirectXTargetInfo.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/CodeGen/Passes.h"
#include "llvm/CodeGen/TargetPassConfig.h"
#include "llvm/IR/IRPrintingPasses.h"
#include "llvm/IR/LegacyPassManager.h"
#include "llvm/MC/MCSectionDXContainer.h"
#include "llvm/MC/SectionKind.h"
#include "llvm/MC/TargetRegistry.h"
#include "llvm/Passes/PassBuilder.h"
#include "llvm/Support/CodeGen.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Target/TargetLoweringObjectFile.h"
#include <optional>
using namespace llvm;
extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeDirectXTarget() {
RegisterTargetMachine<DirectXTargetMachine> X(getTheDirectXTarget());
auto *PR = PassRegistry::getPassRegistry();
initializeDXILPrepareModulePass(*PR);
initializeEmbedDXILPassPass(*PR);
initializeWriteDXILPassPass(*PR);
initializeDXILOpLoweringLegacyPass(*PR);
initializeDXILTranslateMetadataPass(*PR);
initializeDXILResourceWrapperPass(*PR);
initializeShaderFlagsAnalysisWrapperPass(*PR);
}
class DXILTargetObjectFile : public TargetLoweringObjectFile {
public:
DXILTargetObjectFile() = default;
MCSection *getExplicitSectionGlobal(const GlobalObject *GO, SectionKind Kind,
const TargetMachine &TM) const override {
return getContext().getDXContainerSection(GO->getSection(), Kind);
}
protected:
MCSection *SelectSectionForGlobal(const GlobalObject *GO, SectionKind Kind,
const TargetMachine &TM) const override {
llvm_unreachable("Not supported!");
}
};
class DirectXPassConfig : public TargetPassConfig {
public:
DirectXPassConfig(DirectXTargetMachine &TM, PassManagerBase &PM)
: TargetPassConfig(TM, PM) {}
DirectXTargetMachine &getDirectXTargetMachine() const {
return getTM<DirectXTargetMachine>();
}
FunctionPass *createTargetRegisterAllocator(bool) override { return nullptr; }
void addCodeGenPrepare() override {
addPass(createDXILOpLoweringLegacyPass());
addPass(createDXILPrepareModulePass());
addPass(createDXILTranslateMetadataPass());
}
};
DirectXTargetMachine::DirectXTargetMachine(const Target &T, const Triple &TT,
StringRef CPU, StringRef FS,
const TargetOptions &Options,
std::optional<Reloc::Model> RM,
std::optional<CodeModel::Model> CM,
CodeGenOpt::Level OL, bool JIT)
: LLVMTargetMachine(T,
"e-m:e-p:32:32-i1:32-i8:8-i16:16-i32:32-i64:64-f16:16-"
"f32:32-f64:64-n8:16:32:64",
TT, CPU, FS, Options, Reloc::Static, CodeModel::Small,
OL),
TLOF(std::make_unique<DXILTargetObjectFile>()),
Subtarget(std::make_unique<DirectXSubtarget>(TT, CPU, FS, *this)) {
initAsmInfo();
}
DirectXTargetMachine::~DirectXTargetMachine() {}
void DirectXTargetMachine::registerPassBuilderCallbacks(PassBuilder &PB) {
PB.registerPipelineParsingCallback(
[](StringRef PassName, ModulePassManager &PM,
ArrayRef<PassBuilder::PipelineElement>) {
if (PassName == "print-dxil-resource") {
PM.addPass(DXILResourcePrinterPass(dbgs()));
return true;
}
if (PassName == "print-dx-shader-flags") {
PM.addPass(dxil::ShaderFlagsAnalysisPrinter(dbgs()));
return true;
}
return false;
});
PB.registerAnalysisRegistrationCallback([](ModuleAnalysisManager &MAM) {
MAM.registerPass([&] { return DXILResourceAnalysis(); });
MAM.registerPass([&] { return dxil::ShaderFlagsAnalysis(); });
});
}
bool DirectXTargetMachine::addPassesToEmitFile(
PassManagerBase &PM, raw_pwrite_stream &Out, raw_pwrite_stream *DwoOut,
CodeGenFileType FileType, bool DisableVerify,
MachineModuleInfoWrapperPass *MMIWP) {
TargetPassConfig *PassConfig = createPassConfig(PM);
PassConfig->addCodeGenPrepare();
if (TargetPassConfig::willCompleteCodeGenPipeline()) {
PM.add(createDXILEmbedderPass());
// We embed the other DXContainer globals after embedding DXIL so that the
// globals don't pollute the DXIL.
PM.add(createDXContainerGlobalsPass());
}
switch (FileType) {
case CGFT_AssemblyFile:
PM.add(createDXILPrettyPrinterPass(Out));
PM.add(createPrintModulePass(Out, "", true));
break;
case CGFT_ObjectFile:
if (TargetPassConfig::willCompleteCodeGenPipeline()) {
if (!MMIWP)
MMIWP = new MachineModuleInfoWrapperPass(this);
PM.add(MMIWP);
if (addAsmPrinter(PM, Out, DwoOut, FileType,
MMIWP->getMMI().getContext()))
return true;
} else
PM.add(createDXILWriterPass(Out));
break;
case CGFT_Null:
break;
}
return false;
}
bool DirectXTargetMachine::addPassesToEmitMC(PassManagerBase &PM,
MCContext *&Ctx,
raw_pwrite_stream &Out,
bool DisableVerify) {
return true;
}
TargetPassConfig *DirectXTargetMachine::createPassConfig(PassManagerBase &PM) {
return new DirectXPassConfig(*this, PM);
}
const DirectXSubtarget *
DirectXTargetMachine::getSubtargetImpl(const Function &) const {
return Subtarget.get();
}
TargetTransformInfo
DirectXTargetMachine::getTargetTransformInfo(const Function &F) const {
return TargetTransformInfo(DirectXTTIImpl(this, F));
}
DirectXTargetLowering::DirectXTargetLowering(const DirectXTargetMachine &TM,
const DirectXSubtarget &STI)
: TargetLowering(TM) {}
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