97 lines · cpp
1//===-- MSP430TargetMachine.cpp - Define TargetMachine for MSP430 ---------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8//9// Top-level implementation for the MSP430 target.10//11//===----------------------------------------------------------------------===//12 13#include "MSP430TargetMachine.h"14#include "MSP430.h"15#include "MSP430MachineFunctionInfo.h"16#include "TargetInfo/MSP430TargetInfo.h"17#include "llvm/CodeGen/Passes.h"18#include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"19#include "llvm/CodeGen/TargetPassConfig.h"20#include "llvm/MC/TargetRegistry.h"21#include "llvm/Support/Compiler.h"22#include <optional>23using namespace llvm;24 25extern "C" LLVM_ABI LLVM_EXTERNAL_VISIBILITY void LLVMInitializeMSP430Target() {26 // Register the target.27 RegisterTargetMachine<MSP430TargetMachine> X(getTheMSP430Target());28 PassRegistry &PR = *PassRegistry::getPassRegistry();29 initializeMSP430AsmPrinterPass(PR);30 initializeMSP430DAGToDAGISelLegacyPass(PR);31}32 33static Reloc::Model getEffectiveRelocModel(std::optional<Reloc::Model> RM) {34 return RM.value_or(Reloc::Static);35}36 37MSP430TargetMachine::MSP430TargetMachine(const Target &T, const Triple &TT,38 StringRef CPU, StringRef FS,39 const TargetOptions &Options,40 std::optional<Reloc::Model> RM,41 std::optional<CodeModel::Model> CM,42 CodeGenOptLevel OL, bool JIT)43 : CodeGenTargetMachineImpl(T, TT.computeDataLayout(), TT, CPU, FS, Options,44 getEffectiveRelocModel(RM),45 getEffectiveCodeModel(CM, CodeModel::Small), OL),46 TLOF(std::make_unique<TargetLoweringObjectFileELF>()),47 Subtarget(TT, std::string(CPU), std::string(FS), *this) {48 initAsmInfo();49}50 51MSP430TargetMachine::~MSP430TargetMachine() = default;52 53namespace {54/// MSP430 Code Generator Pass Configuration Options.55class MSP430PassConfig : public TargetPassConfig {56public:57 MSP430PassConfig(MSP430TargetMachine &TM, PassManagerBase &PM)58 : TargetPassConfig(TM, PM) {}59 60 MSP430TargetMachine &getMSP430TargetMachine() const {61 return getTM<MSP430TargetMachine>();62 }63 64 void addIRPasses() override;65 bool addInstSelector() override;66 void addPreEmitPass() override;67};68} // namespace69 70TargetPassConfig *MSP430TargetMachine::createPassConfig(PassManagerBase &PM) {71 return new MSP430PassConfig(*this, PM);72}73 74MachineFunctionInfo *MSP430TargetMachine::createMachineFunctionInfo(75 BumpPtrAllocator &Allocator, const Function &F,76 const TargetSubtargetInfo *STI) const {77 return MSP430MachineFunctionInfo::create<MSP430MachineFunctionInfo>(Allocator,78 F, STI);79}80 81void MSP430PassConfig::addIRPasses() {82 addPass(createAtomicExpandLegacyPass());83 84 TargetPassConfig::addIRPasses();85}86 87bool MSP430PassConfig::addInstSelector() {88 // Install an instruction selector.89 addPass(createMSP430ISelDag(getMSP430TargetMachine(), getOptLevel()));90 return false;91}92 93void MSP430PassConfig::addPreEmitPass() {94 // Must run branch selection immediately preceding the asm printer.95 addPass(createMSP430BranchSelectionPass());96}97