| //===-- AVRTargetMachine.cpp - Define TargetMachine for AVR ---------------===// |
| // |
| // 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 |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file defines the AVR specific subclass of TargetMachine. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "AVRTargetMachine.h" |
| |
| #include "llvm/CodeGen/Passes.h" |
| #include "llvm/CodeGen/TargetPassConfig.h" |
| #include "llvm/IR/LegacyPassManager.h" |
| #include "llvm/IR/Module.h" |
| #include "llvm/MC/TargetRegistry.h" |
| |
| #include "AVR.h" |
| #include "AVRTargetObjectFile.h" |
| #include "MCTargetDesc/AVRMCTargetDesc.h" |
| #include "TargetInfo/AVRTargetInfo.h" |
| |
| namespace llvm { |
| |
| static const char *AVRDataLayout = |
| "e-P1-p:16:8-i8:8-i16:8-i32:8-i64:8-f32:8-f64:8-n8-a:8"; |
| |
| /// Processes a CPU name. |
| static StringRef getCPU(StringRef CPU) { |
| if (CPU.empty() || CPU == "generic") { |
| return "avr2"; |
| } |
| |
| return CPU; |
| } |
| |
| static Reloc::Model getEffectiveRelocModel(Optional<Reloc::Model> RM) { |
| return RM.getValueOr(Reloc::Static); |
| } |
| |
| AVRTargetMachine::AVRTargetMachine(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, AVRDataLayout, TT, getCPU(CPU), FS, Options, |
| getEffectiveRelocModel(RM), |
| getEffectiveCodeModel(CM, CodeModel::Small), OL), |
| SubTarget(TT, std::string(getCPU(CPU)), std::string(FS), *this) { |
| this->TLOF = std::make_unique<AVRTargetObjectFile>(); |
| initAsmInfo(); |
| } |
| |
| namespace { |
| /// AVR Code Generator Pass Configuration Options. |
| class AVRPassConfig : public TargetPassConfig { |
| public: |
| AVRPassConfig(AVRTargetMachine &TM, PassManagerBase &PM) |
| : TargetPassConfig(TM, PM) {} |
| |
| AVRTargetMachine &getAVRTargetMachine() const { |
| return getTM<AVRTargetMachine>(); |
| } |
| |
| void addIRPasses() override; |
| bool addInstSelector() override; |
| void addPreSched2() override; |
| void addPreEmitPass() override; |
| void addPreRegAlloc() override; |
| }; |
| } // namespace |
| |
| TargetPassConfig *AVRTargetMachine::createPassConfig(PassManagerBase &PM) { |
| return new AVRPassConfig(*this, PM); |
| } |
| |
| void AVRPassConfig::addIRPasses() { |
| // Expand instructions like |
| // %result = shl i32 %n, %amount |
| // to a loop so that library calls are avoided. |
| addPass(createAVRShiftExpandPass()); |
| |
| TargetPassConfig::addIRPasses(); |
| } |
| |
| extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeAVRTarget() { |
| // Register the target. |
| RegisterTargetMachine<AVRTargetMachine> X(getTheAVRTarget()); |
| |
| auto &PR = *PassRegistry::getPassRegistry(); |
| initializeAVRExpandPseudoPass(PR); |
| initializeAVRRelaxMemPass(PR); |
| initializeAVRShiftExpandPass(PR); |
| } |
| |
| const AVRSubtarget *AVRTargetMachine::getSubtargetImpl() const { |
| return &SubTarget; |
| } |
| |
| const AVRSubtarget *AVRTargetMachine::getSubtargetImpl(const Function &) const { |
| return &SubTarget; |
| } |
| |
| //===----------------------------------------------------------------------===// |
| // Pass Pipeline Configuration |
| //===----------------------------------------------------------------------===// |
| |
| bool AVRPassConfig::addInstSelector() { |
| // Install an instruction selector. |
| addPass(createAVRISelDag(getAVRTargetMachine(), getOptLevel())); |
| // Create the frame analyzer pass used by the PEI pass. |
| addPass(createAVRFrameAnalyzerPass()); |
| |
| return false; |
| } |
| |
| void AVRPassConfig::addPreRegAlloc() { |
| // Create the dynalloc SP save/restore pass to handle variable sized allocas. |
| addPass(createAVRDynAllocaSRPass()); |
| } |
| |
| void AVRPassConfig::addPreSched2() { |
| addPass(createAVRRelaxMemPass()); |
| addPass(createAVRExpandPseudoPass()); |
| } |
| |
| void AVRPassConfig::addPreEmitPass() { |
| // Must run branch selection immediately preceding the asm printer. |
| addPass(&BranchRelaxationPassID); |
| } |
| |
| } // end of namespace llvm |