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//===-- VETargetMachine.cpp - Define TargetMachine for VE -----------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
//
//===----------------------------------------------------------------------===//
#include "VETargetMachine.h"
#include "TargetInfo/VETargetInfo.h"
#include "VE.h"
#include "VEMachineFunctionInfo.h"
#include "VETargetTransformInfo.h"
#include "llvm/CodeGen/Passes.h"
#include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
#include "llvm/CodeGen/TargetPassConfig.h"
#include "llvm/IR/LegacyPassManager.h"
#include "llvm/MC/TargetRegistry.h"
#include "llvm/Support/Compiler.h"
#include <optional>
using namespace llvm;
#define DEBUG_TYPE "ve"
extern "C" LLVM_ABI LLVM_EXTERNAL_VISIBILITY void LLVMInitializeVETarget() {
// Register the target.
RegisterTargetMachine<VETargetMachine> X(getTheVETarget());
PassRegistry &PR = *PassRegistry::getPassRegistry();
initializeVEAsmPrinterPass(PR);
initializeVEDAGToDAGISelLegacyPass(PR);
}
static std::string computeDataLayout(const Triple &T) {
// Aurora VE is little endian
std::string Ret = "e";
// Use ELF mangling
Ret += "-m:e";
// Alignments for 64 bit integers.
Ret += "-i64:64";
// VE supports 32 bit and 64 bits integer on registers
Ret += "-n32:64";
// Stack alignment is 128 bits
Ret += "-S128";
// Vector alignments are 64 bits
// Need to define all of them. Otherwise, each alignment becomes
// the size of each data by default.
Ret += "-v64:64:64"; // for v2f32
Ret += "-v128:64:64";
Ret += "-v256:64:64";
Ret += "-v512:64:64";
Ret += "-v1024:64:64";
Ret += "-v2048:64:64";
Ret += "-v4096:64:64";
Ret += "-v8192:64:64";
Ret += "-v16384:64:64"; // for v256f64
return Ret;
}
static Reloc::Model getEffectiveRelocModel(std::optional<Reloc::Model> RM) {
return RM.value_or(Reloc::Static);
}
namespace {
class VEELFTargetObjectFile : public TargetLoweringObjectFileELF {
void Initialize(MCContext &Ctx, const TargetMachine &TM) override {
TargetLoweringObjectFileELF::Initialize(Ctx, TM);
InitializeELF(TM.Options.UseInitArray);
}
};
} // namespace
static std::unique_ptr<TargetLoweringObjectFile> createTLOF() {
return std::make_unique<VEELFTargetObjectFile>();
}
/// Create an Aurora VE architecture model
VETargetMachine::VETargetMachine(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)
: CodeGenTargetMachineImpl(T, computeDataLayout(TT), TT, CPU, FS, Options,
getEffectiveRelocModel(RM),
getEffectiveCodeModel(CM, CodeModel::Small), OL),
TLOF(createTLOF()),
Subtarget(TT, std::string(CPU), std::string(FS), *this) {
initAsmInfo();
}
VETargetMachine::~VETargetMachine() = default;
TargetTransformInfo
VETargetMachine::getTargetTransformInfo(const Function &F) const {
return TargetTransformInfo(std::make_unique<VETTIImpl>(this, F));
}
MachineFunctionInfo *VETargetMachine::createMachineFunctionInfo(
BumpPtrAllocator &Allocator, const Function &F,
const TargetSubtargetInfo *STI) const {
return VEMachineFunctionInfo::create<VEMachineFunctionInfo>(Allocator, F,
STI);
}
namespace {
/// VE Code Generator Pass Configuration Options.
class VEPassConfig : public TargetPassConfig {
public:
VEPassConfig(VETargetMachine &TM, PassManagerBase &PM)
: TargetPassConfig(TM, PM) {}
VETargetMachine &getVETargetMachine() const {
return getTM<VETargetMachine>();
}
void addIRPasses() override;
bool addInstSelector() override;
void addPreEmitPass() override;
};
} // namespace
TargetPassConfig *VETargetMachine::createPassConfig(PassManagerBase &PM) {
return new VEPassConfig(*this, PM);
}
void VEPassConfig::addIRPasses() {
// VE requires atomic expand pass.
addPass(createAtomicExpandLegacyPass());
TargetPassConfig::addIRPasses();
}
bool VEPassConfig::addInstSelector() {
addPass(createVEISelDag(getVETargetMachine()));
return false;
}
void VEPassConfig::addPreEmitPass() {
// LVLGen should be called after scheduling and register allocation
addPass(createLVLGenPass());
}
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