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/Support/TargetRegistry.h"
22using namespace llvm;
23
24extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeMSP430Target() {
25  // Register the target.
26  RegisterTargetMachine<MSP430TargetMachine> X(getTheMSP430Target());
27}
28
29static Reloc::Model getEffectiveRelocModel(Optional<Reloc::Model> RM) {
30  if (!RM.hasValue())
31    return Reloc::Static;
32  return *RM;
33}
34
35static 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
40MSP430TargetMachine::MSP430TargetMachine(const Target &T, const Triple &TT,
41                                         StringRef CPU, StringRef FS,
42                                         const TargetOptions &Options,
43                                         Optional<Reloc::Model> RM,
44                                         Optional<CodeModel::Model> CM,
45                                         CodeGenOpt::Level OL, bool JIT)
46    : LLVMTargetMachine(T, computeDataLayout(TT, CPU, Options), TT, CPU, FS,
47                        Options, getEffectiveRelocModel(RM),
48                        getEffectiveCodeModel(CM, CodeModel::Small), OL),
49      TLOF(std::make_unique<TargetLoweringObjectFileELF>()),
50      Subtarget(TT, CPU, FS, *this) {
51  initAsmInfo();
52}
53
54MSP430TargetMachine::~MSP430TargetMachine() {}
55
56namespace {
57/// MSP430 Code Generator Pass Configuration Options.
58class MSP430PassConfig : public TargetPassConfig {
59public:
60  MSP430PassConfig(MSP430TargetMachine &TM, PassManagerBase &PM)
61    : TargetPassConfig(TM, PM) {}
62
63  MSP430TargetMachine &getMSP430TargetMachine() const {
64    return getTM<MSP430TargetMachine>();
65  }
66
67  bool addInstSelector() override;
68  void addPreEmitPass() override;
69};
70} // namespace
71
72TargetPassConfig *MSP430TargetMachine::createPassConfig(PassManagerBase &PM) {
73  return new MSP430PassConfig(*this, PM);
74}
75
76bool MSP430PassConfig::addInstSelector() {
77  // Install an instruction selector.
78  addPass(createMSP430ISelDag(getMSP430TargetMachine(), getOptLevel()));
79  return false;
80}
81
82void MSP430PassConfig::addPreEmitPass() {
83  // Must run branch selection immediately preceding the asm printer.
84  addPass(createMSP430BranchSelectionPass(), false);
85}
86