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 #include <optional> 23 using namespace llvm; 24 25 extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeMSP430Target() { 26 // Register the target. 27 RegisterTargetMachine<MSP430TargetMachine> X(getTheMSP430Target()); 28 } 29 30 static Reloc::Model getEffectiveRelocModel(Optional<Reloc::Model> RM) { 31 return RM.value_or(Reloc::Static); 32 } 33 34 static std::string computeDataLayout(const Triple &TT, StringRef CPU, 35 const TargetOptions &Options) { 36 return "e-m:e-p:16:16-i32:16-i64:16-f32:16-f64:16-a:8-n8:16-S16"; 37 } 38 39 MSP430TargetMachine::MSP430TargetMachine(const Target &T, const Triple &TT, 40 StringRef CPU, StringRef FS, 41 const TargetOptions &Options, 42 Optional<Reloc::Model> RM, 43 std::optional<CodeModel::Model> CM, 44 CodeGenOpt::Level OL, bool JIT) 45 : LLVMTargetMachine(T, computeDataLayout(TT, CPU, Options), TT, CPU, FS, 46 Options, getEffectiveRelocModel(RM), 47 getEffectiveCodeModel(CM, CodeModel::Small), OL), 48 TLOF(std::make_unique<TargetLoweringObjectFileELF>()), 49 Subtarget(TT, std::string(CPU), std::string(FS), *this) { 50 initAsmInfo(); 51 } 52 53 MSP430TargetMachine::~MSP430TargetMachine() = default; 54 55 namespace { 56 /// MSP430 Code Generator Pass Configuration Options. 57 class MSP430PassConfig : public TargetPassConfig { 58 public: 59 MSP430PassConfig(MSP430TargetMachine &TM, PassManagerBase &PM) 60 : TargetPassConfig(TM, PM) {} 61 62 MSP430TargetMachine &getMSP430TargetMachine() const { 63 return getTM<MSP430TargetMachine>(); 64 } 65 66 bool addInstSelector() override; 67 void addPreEmitPass() override; 68 }; 69 } // namespace 70 71 TargetPassConfig *MSP430TargetMachine::createPassConfig(PassManagerBase &PM) { 72 return new MSP430PassConfig(*this, PM); 73 } 74 75 bool MSP430PassConfig::addInstSelector() { 76 // Install an instruction selector. 77 addPass(createMSP430ISelDag(getMSP430TargetMachine(), getOptLevel())); 78 return false; 79 } 80 81 void MSP430PassConfig::addPreEmitPass() { 82 // Must run branch selection immediately preceding the asm printer. 83 addPass(createMSP430BranchSelectionPass()); 84 } 85