forked from OSchip/llvm-project
120 lines
3.8 KiB
C++
120 lines
3.8 KiB
C++
//===-- Nios2TargetMachine.cpp - Define TargetMachine for Nios2 -----------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Implements the info about Nios2 target spec.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "Nios2TargetMachine.h"
|
|
#include "Nios2.h"
|
|
#include "Nios2TargetObjectFile.h"
|
|
|
|
#include "llvm/CodeGen/TargetPassConfig.h"
|
|
#include "llvm/Support/TargetRegistry.h"
|
|
|
|
using namespace llvm;
|
|
|
|
#define DEBUG_TYPE "nios2"
|
|
|
|
extern "C" void LLVMInitializeNios2Target() {
|
|
// Register the target.
|
|
RegisterTargetMachine<Nios2TargetMachine> X(getTheNios2Target());
|
|
}
|
|
|
|
static std::string computeDataLayout() {
|
|
return "e-p:32:32:32-i8:8:32-i16:16:32-n32";
|
|
}
|
|
|
|
static Reloc::Model getEffectiveRelocModel(Optional<Reloc::Model> RM) {
|
|
if (!RM.hasValue())
|
|
return Reloc::Static;
|
|
return *RM;
|
|
}
|
|
|
|
static CodeModel::Model getEffectiveCodeModel(Optional<CodeModel::Model> CM,
|
|
Reloc::Model RM, bool JIT) {
|
|
if (CM)
|
|
return *CM;
|
|
return CodeModel::Small;
|
|
}
|
|
|
|
Nios2TargetMachine::Nios2TargetMachine(const Target &T, const Triple &TT,
|
|
StringRef CPU, StringRef FS,
|
|
const TargetOptions &Options,
|
|
Optional<Reloc::Model> RM,
|
|
Optional<CodeModel::Model> CM,
|
|
CodeGenOpt::Level OL, bool JIT)
|
|
: LLVMTargetMachine(
|
|
T, computeDataLayout(), TT, CPU, FS, Options,
|
|
getEffectiveRelocModel(RM),
|
|
getEffectiveCodeModel(CM, getEffectiveRelocModel(RM), JIT), OL),
|
|
TLOF(make_unique<Nios2TargetObjectFile>()),
|
|
Subtarget(TT, CPU, FS, *this) {
|
|
initAsmInfo();
|
|
}
|
|
|
|
Nios2TargetMachine::~Nios2TargetMachine() {}
|
|
|
|
const Nios2Subtarget *
|
|
Nios2TargetMachine::getSubtargetImpl(const Function &F) const {
|
|
Attribute CPUAttr = F.getFnAttribute("target-cpu");
|
|
Attribute FSAttr = F.getFnAttribute("target-features");
|
|
|
|
std::string CPU = !CPUAttr.hasAttribute(Attribute::None)
|
|
? CPUAttr.getValueAsString().str()
|
|
: TargetCPU;
|
|
std::string FS = !FSAttr.hasAttribute(Attribute::None)
|
|
? FSAttr.getValueAsString().str()
|
|
: TargetFS;
|
|
|
|
auto &I = SubtargetMap[CPU + FS];
|
|
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 = llvm::make_unique<Nios2Subtarget>(TargetTriple, CPU, FS, *this);
|
|
}
|
|
return I.get();
|
|
}
|
|
|
|
namespace {
|
|
/// Nios2 Code Generator Pass Configuration Options.
|
|
class Nios2PassConfig : public TargetPassConfig {
|
|
public:
|
|
Nios2PassConfig(Nios2TargetMachine &TM, PassManagerBase *PM)
|
|
: TargetPassConfig(TM, *PM) {}
|
|
|
|
Nios2TargetMachine &getNios2TargetMachine() const {
|
|
return getTM<Nios2TargetMachine>();
|
|
}
|
|
|
|
void addCodeGenPrepare() override;
|
|
bool addInstSelector() override;
|
|
void addIRPasses() override;
|
|
};
|
|
} // namespace
|
|
|
|
TargetPassConfig *Nios2TargetMachine::createPassConfig(PassManagerBase &PM) {
|
|
return new Nios2PassConfig(*this, &PM);
|
|
}
|
|
|
|
void Nios2PassConfig::addCodeGenPrepare() {
|
|
TargetPassConfig::addCodeGenPrepare();
|
|
}
|
|
|
|
void Nios2PassConfig::addIRPasses() { TargetPassConfig::addIRPasses(); }
|
|
|
|
// Install an instruction selector pass using
|
|
// the ISelDag to gen Nios2 code.
|
|
bool Nios2PassConfig::addInstSelector() {
|
|
addPass(createNios2ISelDag(getNios2TargetMachine(), getOptLevel()));
|
|
return false;
|
|
}
|