MSP430.h

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//===--- MSP430.h - Declare MSP430 target feature support -------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file declares MSP430 TargetInfo objects.
//
//===----------------------------------------------------------------------===//
 
#ifndef LLVM_CLANG_LIB_BASIC_TARGETS_MSP430_H
#define LLVM_CLANG_LIB_BASIC_TARGETS_MSP430_H
 
#include "clang/Basic/TargetInfo.h"
#include "clang/Basic/TargetOptions.h"
#include "llvm/Support/Compiler.h"
#include "llvm/TargetParser/Triple.h"
 
namespace clang {
namespace targets {
 
class LLVM_LIBRARY_VISIBILITY MSP430TargetInfo : public TargetInfo {
  static const char *const GCCRegNames[];
 
public:
  MSP430TargetInfo(const llvm::Triple &Triple, const TargetOptions &)
      : TargetInfo(Triple) {
    TLSSupported = false;
    IntWidth = 16;
    IntAlign = 16;
    LongWidth = 32;
    LongLongWidth = 64;
    LongAlign = LongLongAlign = 16;
    FloatWidth = 32;
    FloatAlign = 16;
    DoubleWidth = LongDoubleWidth = 64;
    DoubleAlign = LongDoubleAlign = 16;
    PointerWidth = 16;
    PointerAlign = 16;
    SuitableAlign = 16;
    SizeType = UnsignedInt;
    IntMaxType = SignedLongLong;
    IntPtrType = SignedInt;
    PtrDiffType = SignedInt;
    WCharType = SignedInt;
    WIntType = UnsignedInt;
    SigAtomicType = SignedLong;
    resetDataLayout();
  }
  void getTargetDefines(const LangOptions &Opts,
                        MacroBuilder &Builder) const override;
 
  llvm::SmallVector<Builtin::InfosShard> getTargetBuiltins() const override {
    // FIXME: Implement.
    return {};
  }
 
  bool allowsLargerPreferedTypeAlignment() const override { return false; }
 
  bool hasFeature(StringRef Feature) const override {
    return Feature == "msp430";
  }
 
  ArrayRef<const char *> getGCCRegNames() const override;
 
  ArrayRef<TargetInfo::GCCRegAlias> getGCCRegAliases() const override {
    // Make r0 - r3 be recognized by llc (f.e., in clobber list)
    static const TargetInfo::GCCRegAlias GCCRegAliases[] = {
        {{"r0"}, "pc"},
        {{"r1"}, "sp"},
        {{"r2"}, "sr"},
        {{"r3"}, "cg"},
    };
    return llvm::ArrayRef(GCCRegAliases);
  }
 
  bool validateAsmConstraint(const char *&Name,
                             TargetInfo::ConstraintInfo &info) const override {
    // FIXME: implement
    switch (*Name) {
    case 'K': // the constant 1
    case 'L': // constant -1^20 .. 1^19
    case 'M': // constant 1-4:
      return true;
    }
    // No target constraints for now.
    return false;
  }
 
  std::string_view getClobbers() const override {
    // FIXME: Is this really right?
    return "";
  }
 
  // The registers that receive the exception pointer and the selector, R12
  // and R13, as in GCC.
  int getEHDataRegisterNumber(unsigned RegNo) const override {
    if (RegNo == 0)
      return 12;
    if (RegNo == 1)
      return 13;
    return -1;
  }
 
  BuiltinVaListKind getBuiltinVaListKind() const override {
    // FIXME: implement
    return TargetInfo::CharPtrBuiltinVaList;
  }
};
 
} // namespace targets
} // namespace clang
#endif // LLVM_CLANG_LIB_BASIC_TARGETS_MSP430_H