llvm/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 "MSP430MachineFunctionInfo.h"
  16 #include "TargetInfo/MSP430TargetInfo.h"
  17 #include "llvm/CodeGen/Passes.h"
  18 #include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
  19 #include "llvm/CodeGen/TargetPassConfig.h"
  20 #include "llvm/MC/MCAsmInfo.h"
  21 #include "llvm/MC/TargetRegistry.h"
  22 #include <optional>
  23 using namespace llvm;
  24
  25 extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeMSP430Target() {
  26   // Register the target.
  27   RegisterTargetMachine<MSP430TargetMachine> X(getTheMSP430Target());
  28   PassRegistry &PR = *PassRegistry::getPassRegistry();
  29   initializeMSP430DAGToDAGISelLegacyPass(PR);
  30 }
  31
  32 static Reloc::Model getEffectiveRelocModel(std::optional<Reloc::Model> RM) {
  33   return RM.value_or(Reloc::Static);
  34 }
  35
  36 static std::string computeDataLayout(const Triple &TT, StringRef CPU,
  37                                      const TargetOptions &Options) {
  38   return "e-m:e-p:16:16-i32:16-i64:16-f32:16-f64:16-a:8-n8:16-S16";
  39 }
  40
  41 MSP430TargetMachine::MSP430TargetMachine(const Target &T, const Triple &TT,
  42                                          StringRef CPU, StringRef FS,
  43                                          const TargetOptions &Options,
  44                                          std::optional<Reloc::Model> RM,
  45                                          std::optional<CodeModel::Model> CM,
  46                                          CodeGenOptLevel OL, bool JIT)
  47     : LLVMTargetMachine(T, computeDataLayout(TT, CPU, Options), TT, CPU, FS,
  48                         Options, getEffectiveRelocModel(RM),
  49                         getEffectiveCodeModel(CM, CodeModel::Small), OL),
  50       TLOF(std::make_unique<TargetLoweringObjectFileELF>()),
  51       Subtarget(TT, std::string(CPU), std::string(FS), *this) {
  52   initAsmInfo();
  53 }
  54
  55 MSP430TargetMachine::~MSP430TargetMachine() = default;
  56
  57 namespace {
  58 /// MSP430 Code Generator Pass Configuration Options.
  59 class MSP430PassConfig : public TargetPassConfig {
  60 public:
  61   MSP430PassConfig(MSP430TargetMachine &TM, PassManagerBase &PM)
  62     : TargetPassConfig(TM, PM) {}
  63
  64   MSP430TargetMachine &getMSP430TargetMachine() const {
  65     return getTM<MSP430TargetMachine>();
  66   }
  67
  68   void addIRPasses() override;
  69   bool addInstSelector() override;
  70   void addPreEmitPass() override;
  71 };
  72 } // namespace
  73
  74 TargetPassConfig *MSP430TargetMachine::createPassConfig(PassManagerBase &PM) {
  75   return new MSP430PassConfig(*this, PM);
  76 }
  77
  78 MachineFunctionInfo *MSP430TargetMachine::createMachineFunctionInfo(
  79     BumpPtrAllocator &Allocator, const Function &F,
  80     const TargetSubtargetInfo *STI) const {
  81   return MSP430MachineFunctionInfo::create<MSP430MachineFunctionInfo>(Allocator,
  82                                                                       F, STI);
  83 }
  84
  85 void MSP430PassConfig::addIRPasses() {
  86   addPass(createAtomicExpandLegacyPass());
  87
  88   TargetPassConfig::addIRPasses();
  89 }
  90
  91 bool MSP430PassConfig::addInstSelector() {
  92   // Install an instruction selector.
  93   addPass(createMSP430ISelDag(getMSP430TargetMachine(), getOptLevel()));
  94   return false;
  95 }
  96
  97 void MSP430PassConfig::addPreEmitPass() {
  98   // Must run branch selection immediately preceding the asm printer.
  99   addPass(createMSP430BranchSelectionPass());
 100 }