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 "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 <optional> 22 using namespace llvm; 23 24 extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeMSP430Target() { 25 // Register the target. 26 RegisterTargetMachine<MSP430TargetMachine> X(getTheMSP430Target()); 27 PassRegistry &PR = *PassRegistry::getPassRegistry(); 28 initializeMSP430DAGToDAGISelLegacyPass(PR); 29 } 30 31 static Reloc::Model getEffectiveRelocModel(std::optional<Reloc::Model> RM) { 32 return RM.value_or(Reloc::Static); 33 } 34 35 static std::string computeDataLayout(const Triple &TT, StringRef CPU, 36 const TargetOptions &Options) { 37 return "e-m:e-p:16:16-i32:16-i64:16-f32:16-f64:16-a:8-n8:16-S16"; 38 } 39 40 MSP430TargetMachine::MSP430TargetMachine(const Target &T, const Triple &TT, 41 StringRef CPU, StringRef FS, 42 const TargetOptions &Options, 43 std::optional<Reloc::Model> RM, 44 std::optional<CodeModel::Model> CM, 45 CodeGenOptLevel OL, bool JIT) 46 : CodeGenTargetMachineImpl(T, computeDataLayout(TT, CPU, Options), TT, CPU, 47 FS, Options, getEffectiveRelocModel(RM), 48 getEffectiveCodeModel(CM, CodeModel::Small), OL), 49 TLOF(std::make_unique<TargetLoweringObjectFileELF>()), 50 Subtarget(TT, std::string(CPU), std::string(FS), *this) { 51 initAsmInfo(); 52 } 53 54 MSP430TargetMachine::~MSP430TargetMachine() = default; 55 56 namespace { 57 /// MSP430 Code Generator Pass Configuration Options. 58 class MSP430PassConfig : public TargetPassConfig { 59 public: 60 MSP430PassConfig(MSP430TargetMachine &TM, PassManagerBase &PM) 61 : TargetPassConfig(TM, PM) {} 62 63 MSP430TargetMachine &getMSP430TargetMachine() const { 64 return getTM<MSP430TargetMachine>(); 65 } 66 67 void addIRPasses() override; 68 bool addInstSelector() override; 69 void addPreEmitPass() override; 70 }; 71 } // namespace 72 73 TargetPassConfig *MSP430TargetMachine::createPassConfig(PassManagerBase &PM) { 74 return new MSP430PassConfig(*this, PM); 75 } 76 77 MachineFunctionInfo *MSP430TargetMachine::createMachineFunctionInfo( 78 BumpPtrAllocator &Allocator, const Function &F, 79 const TargetSubtargetInfo *STI) const { 80 return MSP430MachineFunctionInfo::create<MSP430MachineFunctionInfo>(Allocator, 81 F, STI); 82 } 83 84 void MSP430PassConfig::addIRPasses() { 85 addPass(createAtomicExpandLegacyPass()); 86 87 TargetPassConfig::addIRPasses(); 88 } 89 90 bool MSP430PassConfig::addInstSelector() { 91 // Install an instruction selector. 92 addPass(createMSP430ISelDag(getMSP430TargetMachine(), getOptLevel())); 93 return false; 94 } 95 96 void MSP430PassConfig::addPreEmitPass() { 97 // Must run branch selection immediately preceding the asm printer. 98 addPass(createMSP430BranchSelectionPass()); 99 } 100