contrib/llvm/lib/Target/MSP430/MSP430TargetMachine.cpp

   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"
  22 using namespace llvm;
  23
  24 extern "C" void LLVMInitializeMSP430Target() {
  25   // Register the target.
  26   RegisterTargetMachine<MSP430TargetMachine> X(getTheMSP430Target());
  27 }
  28
  29 static Reloc::Model getEffectiveRelocModel(Optional<Reloc::Model> RM) {
  30   if (!RM.hasValue())
  31     return Reloc::Static;
  32   return *RM;
  33 }
  34
  35 static CodeModel::Model getEffectiveCodeModel(Optional<CodeModel::Model> CM) {
  36   if (CM)
  37     return *CM;
  38   return CodeModel::Small;
  39 }
  40
  41 static std::string computeDataLayout(const Triple &TT, StringRef CPU,
  42                                      const TargetOptions &Options) {
  43   return "e-m:e-p:16:16-i32:16-i64:16-f32:16-f64:16-a:8-n8:16-S16";
  44 }
  45
  46 MSP430TargetMachine::MSP430TargetMachine(const Target &T, const Triple &TT,
  47                                          StringRef CPU, StringRef FS,
  48                                          const TargetOptions &Options,
  49                                          Optional<Reloc::Model> RM,
  50                                          Optional<CodeModel::Model> CM,
  51                                          CodeGenOpt::Level OL, bool JIT)
  52     : LLVMTargetMachine(T, computeDataLayout(TT, CPU, Options), TT, CPU, FS,
  53                         Options, getEffectiveRelocModel(RM),
  54                         getEffectiveCodeModel(CM), OL),
  55       TLOF(make_unique<TargetLoweringObjectFileELF>()),
  56       Subtarget(TT, CPU, FS, *this) {
  57   initAsmInfo();
  58 }
  59
  60 MSP430TargetMachine::~MSP430TargetMachine() {}
  61
  62 namespace {
  63 /// MSP430 Code Generator Pass Configuration Options.
  64 class MSP430PassConfig : public TargetPassConfig {
  65 public:
  66   MSP430PassConfig(MSP430TargetMachine &TM, PassManagerBase &PM)
  67     : TargetPassConfig(TM, PM) {}
  68
  69   MSP430TargetMachine &getMSP430TargetMachine() const {
  70     return getTM<MSP430TargetMachine>();
  71   }
  72
  73   bool addInstSelector() override;
  74   void addPreEmitPass() override;
  75 };
  76 } // namespace
  77
  78 TargetPassConfig *MSP430TargetMachine::createPassConfig(PassManagerBase &PM) {
  79   return new MSP430PassConfig(*this, PM);
  80 }
  81
  82 bool MSP430PassConfig::addInstSelector() {
  83   // Install an instruction selector.
  84   addPass(createMSP430ISelDag(getMSP430TargetMachine(), getOptLevel()));
  85   return false;
  86 }
  87
  88 void MSP430PassConfig::addPreEmitPass() {
  89   // Must run branch selection immediately preceding the asm printer.
  90   addPass(createMSP430BranchSelectionPass(), false);
  91 }