lib/Target/MSP430/MSP430TargetMachine.cpp

   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"
  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 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
  40 MSP430TargetMachine::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
  54 MSP430TargetMachine::~MSP430TargetMachine() {}
  55
  56 namespace {
  57 /// MSP430 Code Generator Pass Configuration Options.
  58 class MSP430PassConfig : public TargetPassConfig {
  59 public:
  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
  72 TargetPassConfig *MSP430TargetMachine::createPassConfig(PassManagerBase &PM) {
  73   return new MSP430PassConfig(*this, PM);
  74 }
  75
  76 bool MSP430PassConfig::addInstSelector() {
  77   // Install an instruction selector.
  78   addPass(createMSP430ISelDag(getMSP430TargetMachine(), getOptLevel()));
  79   return false;
  80 }
  81
  82 void MSP430PassConfig::addPreEmitPass() {
  83   // Must run branch selection immediately preceding the asm printer.
  84   addPass(createMSP430BranchSelectionPass(), false);
  85 }