| //===-- SparcTargetMachine.cpp - Define TargetMachine for Sparc -----------===// |
| // |
| // 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 "SparcTargetMachine.h" |
| #include "LeonPasses.h" |
| #include "Sparc.h" |
| #include "SparcTargetObjectFile.h" |
| #include "TargetInfo/SparcTargetInfo.h" |
| #include "llvm/CodeGen/Passes.h" |
| #include "llvm/CodeGen/TargetPassConfig.h" |
| #include "llvm/IR/LegacyPassManager.h" |
| #include "llvm/MC/TargetRegistry.h" |
| using namespace llvm; |
| |
| extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeSparcTarget() { |
| // Register the target. |
| RegisterTargetMachine<SparcV8TargetMachine> X(getTheSparcTarget()); |
| RegisterTargetMachine<SparcV9TargetMachine> Y(getTheSparcV9Target()); |
| RegisterTargetMachine<SparcelTargetMachine> Z(getTheSparcelTarget()); |
| } |
| |
| static std::string computeDataLayout(const Triple &T, bool is64Bit) { |
| // Sparc is typically big endian, but some are little. |
| std::string Ret = T.getArch() == Triple::sparcel ? "e" : "E"; |
| Ret += "-m:e"; |
| |
| // Some ABIs have 32bit pointers. |
| if (!is64Bit) |
| Ret += "-p:32:32"; |
| |
| // Alignments for 64 bit integers. |
| Ret += "-i64:64"; |
| |
| // On SparcV9 128 floats are aligned to 128 bits, on others only to 64. |
| // On SparcV9 registers can hold 64 or 32 bits, on others only 32. |
| if (is64Bit) |
| Ret += "-n32:64"; |
| else |
| Ret += "-f128:64-n32"; |
| |
| if (is64Bit) |
| Ret += "-S128"; |
| else |
| Ret += "-S64"; |
| |
| return Ret; |
| } |
| |
| static Reloc::Model getEffectiveRelocModel(Optional<Reloc::Model> RM) { |
| return RM.getValueOr(Reloc::Static); |
| } |
| |
| // Code models. Some only make sense for 64-bit code. |
| // |
| // SunCC Reloc CodeModel Constraints |
| // abs32 Static Small text+data+bss linked below 2^32 bytes |
| // abs44 Static Medium text+data+bss linked below 2^44 bytes |
| // abs64 Static Large text smaller than 2^31 bytes |
| // pic13 PIC_ Small GOT < 2^13 bytes |
| // pic32 PIC_ Medium GOT < 2^32 bytes |
| // |
| // All code models require that the text segment is smaller than 2GB. |
| static CodeModel::Model |
| getEffectiveSparcCodeModel(Optional<CodeModel::Model> CM, Reloc::Model RM, |
| bool Is64Bit, bool JIT) { |
| if (CM) { |
| if (*CM == CodeModel::Tiny) |
| report_fatal_error("Target does not support the tiny CodeModel", false); |
| if (*CM == CodeModel::Kernel) |
| report_fatal_error("Target does not support the kernel CodeModel", false); |
| return *CM; |
| } |
| if (Is64Bit) { |
| if (JIT) |
| return CodeModel::Large; |
| return RM == Reloc::PIC_ ? CodeModel::Small : CodeModel::Medium; |
| } |
| return CodeModel::Small; |
| } |
| |
| /// Create an ILP32 architecture model |
| SparcTargetMachine::SparcTargetMachine( |
| 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, bool is64bit) |
| : LLVMTargetMachine(T, computeDataLayout(TT, is64bit), TT, CPU, FS, Options, |
| getEffectiveRelocModel(RM), |
| getEffectiveSparcCodeModel( |
| CM, getEffectiveRelocModel(RM), is64bit, JIT), |
| OL), |
| TLOF(std::make_unique<SparcELFTargetObjectFile>()), |
| Subtarget(TT, std::string(CPU), std::string(FS), *this, is64bit), |
| is64Bit(is64bit) { |
| initAsmInfo(); |
| } |
| |
| SparcTargetMachine::~SparcTargetMachine() {} |
| |
| const SparcSubtarget * |
| SparcTargetMachine::getSubtargetImpl(const Function &F) const { |
| Attribute CPUAttr = F.getFnAttribute("target-cpu"); |
| Attribute FSAttr = F.getFnAttribute("target-features"); |
| |
| std::string CPU = |
| CPUAttr.isValid() ? CPUAttr.getValueAsString().str() : TargetCPU; |
| std::string FS = |
| FSAttr.isValid() ? FSAttr.getValueAsString().str() : TargetFS; |
| |
| // FIXME: This is related to the code below to reset the target options, |
| // we need to know whether or not the soft float flag is set on the |
| // function, so we can enable it as a subtarget feature. |
| bool softFloat = F.getFnAttribute("use-soft-float").getValueAsBool(); |
| |
| if (softFloat) |
| FS += FS.empty() ? "+soft-float" : ",+soft-float"; |
| |
| 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 = std::make_unique<SparcSubtarget>(TargetTriple, CPU, FS, *this, |
| this->is64Bit); |
| } |
| return I.get(); |
| } |
| |
| namespace { |
| /// Sparc Code Generator Pass Configuration Options. |
| class SparcPassConfig : public TargetPassConfig { |
| public: |
| SparcPassConfig(SparcTargetMachine &TM, PassManagerBase &PM) |
| : TargetPassConfig(TM, PM) {} |
| |
| SparcTargetMachine &getSparcTargetMachine() const { |
| return getTM<SparcTargetMachine>(); |
| } |
| |
| void addIRPasses() override; |
| bool addInstSelector() override; |
| void addPreEmitPass() override; |
| }; |
| } // namespace |
| |
| TargetPassConfig *SparcTargetMachine::createPassConfig(PassManagerBase &PM) { |
| return new SparcPassConfig(*this, PM); |
| } |
| |
| void SparcPassConfig::addIRPasses() { |
| addPass(createAtomicExpandPass()); |
| |
| TargetPassConfig::addIRPasses(); |
| } |
| |
| bool SparcPassConfig::addInstSelector() { |
| addPass(createSparcISelDag(getSparcTargetMachine())); |
| return false; |
| } |
| |
| void SparcPassConfig::addPreEmitPass(){ |
| addPass(createSparcDelaySlotFillerPass()); |
| |
| if (this->getSparcTargetMachine().getSubtargetImpl()->insertNOPLoad()) |
| { |
| addPass(new InsertNOPLoad()); |
| } |
| if (this->getSparcTargetMachine().getSubtargetImpl()->detectRoundChange()) { |
| addPass(new DetectRoundChange()); |
| } |
| if (this->getSparcTargetMachine().getSubtargetImpl()->fixAllFDIVSQRT()) |
| { |
| addPass(new FixAllFDIVSQRT()); |
| } |
| } |
| |
| void SparcV8TargetMachine::anchor() { } |
| |
| SparcV8TargetMachine::SparcV8TargetMachine(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) |
| : SparcTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL, JIT, false) {} |
| |
| void SparcV9TargetMachine::anchor() { } |
| |
| SparcV9TargetMachine::SparcV9TargetMachine(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) |
| : SparcTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL, JIT, true) {} |
| |
| void SparcelTargetMachine::anchor() {} |
| |
| SparcelTargetMachine::SparcelTargetMachine(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) |
| : SparcTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL, JIT, false) {} |