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/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 PassRegistry &PR = *PassRegistry::getPassRegistry(); 29 initializeMSP430DAGToDAGISelPass(PR); 30 } 31 32 static Reloc::Model getEffectiveRelocModel(std::optional<Reloc::Model> RM) { 33 return RM.value_or(Reloc::Static); 34 } 35 36 static std::string computeDataLayout(const Triple &TT, StringRef CPU, 37 const TargetOptions &Options) { 38 return "e-m:e-p:16:16-i32:16-i64:16-f32:16-f64:16-a:8-n8:16-S16"; 39 } 40 41 MSP430TargetMachine::MSP430TargetMachine(const Target &T, const Triple &TT, 42 StringRef CPU, StringRef FS, 43 const TargetOptions &Options, 44 std::optional<Reloc::Model> RM, 45 std::optional<CodeModel::Model> CM, 46 CodeGenOptLevel OL, bool JIT) 47 : LLVMTargetMachine(T, computeDataLayout(TT, CPU, Options), TT, CPU, FS, 48 Options, getEffectiveRelocModel(RM), 49 getEffectiveCodeModel(CM, CodeModel::Small), OL), 50 TLOF(std::make_unique<TargetLoweringObjectFileELF>()), 51 Subtarget(TT, std::string(CPU), std::string(FS), *this) { 52 initAsmInfo(); 53 } 54 55 MSP430TargetMachine::~MSP430TargetMachine() = default; 56 57 namespace { 58 /// MSP430 Code Generator Pass Configuration Options. 59 class MSP430PassConfig : public TargetPassConfig { 60 public: 61 MSP430PassConfig(MSP430TargetMachine &TM, PassManagerBase &PM) 62 : TargetPassConfig(TM, PM) {} 63 64 MSP430TargetMachine &getMSP430TargetMachine() const { 65 return getTM<MSP430TargetMachine>(); 66 } 67 68 void addIRPasses() override; 69 bool addInstSelector() override; 70 void addPreEmitPass() override; 71 }; 72 } // namespace 73 74 TargetPassConfig *MSP430TargetMachine::createPassConfig(PassManagerBase &PM) { 75 return new MSP430PassConfig(*this, PM); 76 } 77 78 MachineFunctionInfo *MSP430TargetMachine::createMachineFunctionInfo( 79 BumpPtrAllocator &Allocator, const Function &F, 80 const TargetSubtargetInfo *STI) const { 81 return MSP430MachineFunctionInfo::create<MSP430MachineFunctionInfo>(Allocator, 82 F, STI); 83 } 84 85 void MSP430PassConfig::addIRPasses() { 86 addPass(createAtomicExpandPass()); 87 88 TargetPassConfig::addIRPasses(); 89 } 90 91 bool MSP430PassConfig::addInstSelector() { 92 // Install an instruction selector. 93 addPass(createMSP430ISelDag(getMSP430TargetMachine(), getOptLevel())); 94 return false; 95 } 96 97 void MSP430PassConfig::addPreEmitPass() { 98 // Must run branch selection immediately preceding the asm printer. 99 addPass(createMSP430BranchSelectionPass()); 100 } 101