1//===-- MSP430TargetMachine.cpp - Define TargetMachine for MSP430 ---------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// Top-level implementation for the MSP430 target.
11//
12//===----------------------------------------------------------------------===//
13
14#include "MSP430TargetMachine.h"
15#include "MSP430.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" void LLVMInitializeMSP430Target() {
25  // Register the target.
26  RegisterTargetMachine<MSP430TargetMachine> X(TheMSP430Target);
27}
28
29static Reloc::Model getEffectiveRelocModel(Optional<Reloc::Model> RM) {
30  if (!RM.hasValue())
31    return Reloc::Static;
32  return *RM;
33}
34
35MSP430TargetMachine::MSP430TargetMachine(const Target &T, const Triple &TT,
36                                         StringRef CPU, StringRef FS,
37                                         const TargetOptions &Options,
38                                         Optional<Reloc::Model> RM,
39                                         CodeModel::Model CM,
40                                         CodeGenOpt::Level OL)
41    : LLVMTargetMachine(T, "e-m:e-p:16:16-i32:16:32-a:16-n8:16", TT, CPU, FS,
42                        Options, getEffectiveRelocModel(RM), CM, OL),
43      TLOF(make_unique<TargetLoweringObjectFileELF>()),
44      // FIXME: Check DataLayout string.
45      Subtarget(TT, CPU, FS, *this) {
46  initAsmInfo();
47}
48
49MSP430TargetMachine::~MSP430TargetMachine() {}
50
51namespace {
52/// MSP430 Code Generator Pass Configuration Options.
53class MSP430PassConfig : public TargetPassConfig {
54public:
55  MSP430PassConfig(MSP430TargetMachine *TM, PassManagerBase &PM)
56    : TargetPassConfig(TM, PM) {}
57
58  MSP430TargetMachine &getMSP430TargetMachine() const {
59    return getTM<MSP430TargetMachine>();
60  }
61
62  bool addInstSelector() override;
63  void addPreEmitPass() override;
64};
65} // namespace
66
67TargetPassConfig *MSP430TargetMachine::createPassConfig(PassManagerBase &PM) {
68  return new MSP430PassConfig(this, PM);
69}
70
71bool MSP430PassConfig::addInstSelector() {
72  // Install an instruction selector.
73  addPass(createMSP430ISelDag(getMSP430TargetMachine(), getOptLevel()));
74  return false;
75}
76
77void MSP430PassConfig::addPreEmitPass() {
78  // Must run branch selection immediately preceding the asm printer.
79  addPass(createMSP430BranchSelectionPass(), false);
80}
81