1 //===-- MSP430TargetMachine.cpp - Define TargetMachine for MSP430 ---------===//
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
7 //===----------------------------------------------------------------------===//
9 // Top-level implementation for the MSP430 target.
11 //===----------------------------------------------------------------------===//
13 #include "MSP430TargetMachine.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"
24 extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeMSP430Target() {
25 // Register the target.
26 RegisterTargetMachine<MSP430TargetMachine> X(getTheMSP430Target());
29 static Reloc::Model getEffectiveRelocModel(Optional<Reloc::Model> RM) {
30 return RM.value_or(Reloc::Static);
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";
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) {
52 MSP430TargetMachine::~MSP430TargetMachine() = default;
55 /// MSP430 Code Generator Pass Configuration Options.
56 class MSP430PassConfig : public TargetPassConfig {
58 MSP430PassConfig(MSP430TargetMachine &TM, PassManagerBase &PM)
59 : TargetPassConfig(TM, PM) {}
61 MSP430TargetMachine &getMSP430TargetMachine() const {
62 return getTM<MSP430TargetMachine>();
65 bool addInstSelector() override;
66 void addPreEmitPass() override;
70 TargetPassConfig *MSP430TargetMachine::createPassConfig(PassManagerBase &PM) {
71 return new MSP430PassConfig(*this, PM);
74 bool MSP430PassConfig::addInstSelector() {
75 // Install an instruction selector.
76 addPass(createMSP430ISelDag(getMSP430TargetMachine(), getOptLevel()));
80 void MSP430PassConfig::addPreEmitPass() {
81 // Must run branch selection immediately preceding the asm printer.
82 addPass(createMSP430BranchSelectionPass());