MSP430TargetMachine.cpp revision 4c5e43da7792f75567b693105cc53e3f1992ad98 
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/IR/LegacyPassManager.h"
19#include "llvm/MC/MCAsmInfo.h"
20#include "llvm/Support/TargetRegistry.h"
21using namespace llvm;
22
23extern "C" void LLVMInitializeMSP430Target() {
24  // Register the target.
25  RegisterTargetMachine<MSP430TargetMachine> X(TheMSP430Target);
26}
27
28MSP430TargetMachine::MSP430TargetMachine(const Target &T, StringRef TT,
29                                         StringRef CPU, StringRef FS,
30                                         const TargetOptions &Options,
31                                         Reloc::Model RM, CodeModel::Model CM,
32                                         CodeGenOpt::Level OL)
33    : LLVMTargetMachine(T, "e-m:e-p:16:16-i32:16:32-a:16-n8:16", TT, CPU, FS,
34                        Options, RM, CM, OL),
35      TLOF(make_unique<TargetLoweringObjectFileELF>()),
36      // FIXME: Check DataLayout string.
37      Subtarget(TT, CPU, FS, *this) {
38  initAsmInfo();
39}
40
41MSP430TargetMachine::~MSP430TargetMachine() {}
42
43namespace {
44/// MSP430 Code Generator Pass Configuration Options.
45class MSP430PassConfig : public TargetPassConfig {
46public:
47  MSP430PassConfig(MSP430TargetMachine *TM, PassManagerBase &PM)
48    : TargetPassConfig(TM, PM) {}
49
50  MSP430TargetMachine &getMSP430TargetMachine() const {
51    return getTM<MSP430TargetMachine>();
52  }
53
54  bool addInstSelector() override;
55  void addPreEmitPass() override;
56};
57} // namespace
58
59TargetPassConfig *MSP430TargetMachine::createPassConfig(PassManagerBase &PM) {
60  return new MSP430PassConfig(this, PM);
61}
62
63bool MSP430PassConfig::addInstSelector() {
64  // Install an instruction selector.
65  addPass(createMSP430ISelDag(getMSP430TargetMachine(), getOptLevel()));
66  return false;
67}
68
69void MSP430PassConfig::addPreEmitPass() {
70  // Must run branch selection immediately preceding the asm printer.
71  addPass(createMSP430BranchSelectionPass(), false);
72}
73