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-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // Top-level implementation for the MSP430 target. 10 // 11 //===----------------------------------------------------------------------===// 12 13 #include "MSP430TargetMachine.h" 14 #include "MSP430.h" 15 #include "TargetInfo/MSP430TargetInfo.h" 16 #include "llvm/CodeGen/Passes.h" 17 #include "llvm/CodeGen/TargetLoweringObjectFileImpl.h" 18 #include "llvm/CodeGen/TargetPassConfig.h" 19 #include "llvm/IR/LegacyPassManager.h" 20 #include "llvm/MC/MCAsmInfo.h" 21 #include "llvm/MC/TargetRegistry.h" 22 using namespace llvm; 23 24 extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeMSP430Target() { 25 // Register the target. 26 RegisterTargetMachine<MSP430TargetMachine> X(getTheMSP430Target()); 27 } 28 29 static Reloc::Model getEffectiveRelocModel(Optional<Reloc::Model> RM) { 30 return RM.value_or(Reloc::Static); 31 } 32 33 static std::string computeDataLayout(const Triple &TT, StringRef CPU, 34 const TargetOptions &Options) { 35 return "e-m:e-p:16:16-i32:16-i64:16-f32:16-f64:16-a:8-n8:16-S16"; 36 } 37 38 MSP430TargetMachine::MSP430TargetMachine(const Target &T, const Triple &TT, 39 StringRef CPU, StringRef FS, 40 const TargetOptions &Options, 41 Optional<Reloc::Model> RM, 42 Optional<CodeModel::Model> CM, 43 CodeGenOpt::Level OL, bool JIT) 44 : LLVMTargetMachine(T, computeDataLayout(TT, CPU, Options), TT, CPU, FS, 45 Options, getEffectiveRelocModel(RM), 46 getEffectiveCodeModel(CM, CodeModel::Small), OL), 47 TLOF(std::make_unique<TargetLoweringObjectFileELF>()), 48 Subtarget(TT, std::string(CPU), std::string(FS), *this) { 49 initAsmInfo(); 50 } 51 52 MSP430TargetMachine::~MSP430TargetMachine() = default; 53 54 namespace { 55 /// MSP430 Code Generator Pass Configuration Options. 56 class MSP430PassConfig : public TargetPassConfig { 57 public: 58 MSP430PassConfig(MSP430TargetMachine &TM, PassManagerBase &PM) 59 : TargetPassConfig(TM, PM) {} 60 61 MSP430TargetMachine &getMSP430TargetMachine() const { 62 return getTM<MSP430TargetMachine>(); 63 } 64 65 bool addInstSelector() override; 66 void addPreEmitPass() override; 67 }; 68 } // namespace 69 70 TargetPassConfig *MSP430TargetMachine::createPassConfig(PassManagerBase &PM) { 71 return new MSP430PassConfig(*this, PM); 72 } 73 74 bool MSP430PassConfig::addInstSelector() { 75 // Install an instruction selector. 76 addPass(createMSP430ISelDag(getMSP430TargetMachine(), getOptLevel())); 77 return false; 78 } 79 80 void MSP430PassConfig::addPreEmitPass() { 81 // Must run branch selection immediately preceding the asm printer. 82 addPass(createMSP430BranchSelectionPass()); 83 } 84