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//===-- R600TargetMachine.cpp - TargetMachine for hw codegen targets-------===//
//
// 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 both AMDGPU-R600 target machine and the CodeGen pass
/// builder. The target machine contains all of the hardware specific
/// information needed to emit code for R600 GPUs and the CodeGen pass builder
/// handles the pass pipeline for new pass manager.
//
//===----------------------------------------------------------------------===//
#include "R600TargetMachine.h"
#include "R600.h"
#include "R600MachineFunctionInfo.h"
#include "R600MachineScheduler.h"
#include "R600TargetTransformInfo.h"
#include "llvm/Transforms/Scalar.h"
#include <optional>
using namespace llvm;
static cl::opt<bool>
EnableR600StructurizeCFG("r600-ir-structurize",
cl::desc("Use StructurizeCFG IR pass"),
cl::init(true));
static cl::opt<bool> EnableR600IfConvert("r600-if-convert",
cl::desc("Use if conversion pass"),
cl::ReallyHidden, cl::init(true));
static cl::opt<bool, true> EnableAMDGPUFunctionCallsOpt(
"amdgpu-function-calls", cl::desc("Enable AMDGPU function call support"),
cl::location(AMDGPUTargetMachine::EnableFunctionCalls), cl::init(true),
cl::Hidden);
static ScheduleDAGInstrs *createR600MachineScheduler(MachineSchedContext *C) {
return new ScheduleDAGMILive(C, std::make_unique<R600SchedStrategy>());
}
static MachineSchedRegistry R600SchedRegistry("r600",
"Run R600's custom scheduler",
createR600MachineScheduler);
//===----------------------------------------------------------------------===//
// R600 Target Machine (R600 -> Cayman)
//===----------------------------------------------------------------------===//
R600TargetMachine::R600TargetMachine(const Target &T, const Triple &TT,
StringRef CPU, StringRef FS,
const TargetOptions &Options,
std::optional<Reloc::Model> RM,
std::optional<CodeModel::Model> CM,
CodeGenOptLevel OL, bool JIT)
: AMDGPUTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL) {
setRequiresStructuredCFG(true);
// Override the default since calls aren't supported for r600.
if (EnableFunctionCalls &&
EnableAMDGPUFunctionCallsOpt.getNumOccurrences() == 0)
EnableFunctionCalls = false;
}
const TargetSubtargetInfo *
R600TargetMachine::getSubtargetImpl(const Function &F) const {
StringRef GPU = getGPUName(F);
StringRef FS = getFeatureString(F);
SmallString<128> SubtargetKey(GPU);
SubtargetKey.append(FS);
auto &I = SubtargetMap[SubtargetKey];
if (!I) {
// This needs to be done before we create a new subtarget since any
// creation will depend on the TM and the code generation flags on the
// function that reside in TargetOptions.
resetTargetOptions(F);
I = std::make_unique<R600Subtarget>(TargetTriple, GPU, FS, *this);
}
return I.get();
}
TargetTransformInfo
R600TargetMachine::getTargetTransformInfo(const Function &F) const {
return TargetTransformInfo(std::make_unique<R600TTIImpl>(this, F));
}
ScheduleDAGInstrs *
R600TargetMachine::createMachineScheduler(MachineSchedContext *C) const {
return createR600MachineScheduler(C);
}
namespace {
class R600PassConfig final : public AMDGPUPassConfig {
public:
R600PassConfig(TargetMachine &TM, PassManagerBase &PM)
: AMDGPUPassConfig(TM, PM) {}
bool addPreISel() override;
bool addInstSelector() override;
void addPreRegAlloc() override;
void addPreSched2() override;
void addPreEmitPass() override;
};
} // namespace
//===----------------------------------------------------------------------===//
// R600 Pass Setup
//===----------------------------------------------------------------------===//
bool R600PassConfig::addPreISel() {
AMDGPUPassConfig::addPreISel();
if (EnableR600StructurizeCFG)
addPass(createStructurizeCFGPass());
return false;
}
bool R600PassConfig::addInstSelector() {
addPass(createR600ISelDag(getAMDGPUTargetMachine(), getOptLevel()));
return false;
}
void R600PassConfig::addPreRegAlloc() { addPass(createR600VectorRegMerger()); }
void R600PassConfig::addPreSched2() {
addPass(createR600EmitClauseMarkers());
if (EnableR600IfConvert)
addPass(&IfConverterID);
addPass(createR600ClauseMergePass());
}
void R600PassConfig::addPreEmitPass() {
addPass(createR600MachineCFGStructurizerPass());
addPass(createR600ExpandSpecialInstrsPass());
addPass(&FinalizeMachineBundlesID);
addPass(createR600Packetizer());
addPass(createR600ControlFlowFinalizer());
}
TargetPassConfig *R600TargetMachine::createPassConfig(PassManagerBase &PM) {
return new R600PassConfig(*this, PM);
}
Error R600TargetMachine::buildCodeGenPipeline(
ModulePassManager &MPM, raw_pwrite_stream &Out, raw_pwrite_stream *DwoOut,
CodeGenFileType FileType, const CGPassBuilderOption &Opts,
PassInstrumentationCallbacks *PIC) {
R600CodeGenPassBuilder CGPB(*this, Opts, PIC);
return CGPB.buildPipeline(MPM, Out, DwoOut, FileType);
}
MachineFunctionInfo *R600TargetMachine::createMachineFunctionInfo(
BumpPtrAllocator &Allocator, const Function &F,
const TargetSubtargetInfo *STI) const {
return R600MachineFunctionInfo::create<R600MachineFunctionInfo>(
Allocator, F, static_cast<const R600Subtarget *>(STI));
}
//===----------------------------------------------------------------------===//
// R600 CodeGen Pass Builder interface.
//===----------------------------------------------------------------------===//
R600CodeGenPassBuilder::R600CodeGenPassBuilder(
R600TargetMachine &TM, const CGPassBuilderOption &Opts,
PassInstrumentationCallbacks *PIC)
: CodeGenPassBuilder(TM, Opts, PIC) {
Opt.RequiresCodeGenSCCOrder = true;
}
void R600CodeGenPassBuilder::addPreISel(AddIRPass &addPass) const {
// TODO: Add passes pre instruction selection.
}
void R600CodeGenPassBuilder::addAsmPrinter(AddMachinePass &addPass,
CreateMCStreamer) const {
// TODO: Add AsmPrinter.
}
Error R600CodeGenPassBuilder::addInstSelector(AddMachinePass &) const {
// TODO: Add instruction selector.
return Error::success();
}
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