lib/Target/Mips/MCTargetDesc/MipsABIInfo.h

   1 //===---- MipsABIInfo.h - Information about MIPS ABI's --------------------===//
   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 #ifndef LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSABIINFO_H
  10 #define LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSABIINFO_H
  11
  12 #include "llvm/ADT/Triple.h"
  13 #include "llvm/IR/CallingConv.h"
  14 #include "llvm/MC/MCRegisterInfo.h"
  15
  16 namespace llvm {
  17
  18 template <typename T> class ArrayRef;
  19 class MCTargetOptions;
  20 class StringRef;
  21 class TargetRegisterClass;
  22
  23 class MipsABIInfo {
  24 public:
  25   enum class ABI { Unknown, O32, N32, N64 };
  26
  27 protected:
  28   ABI ThisABI;
  29
  30 public:
  31   MipsABIInfo(ABI ThisABI) : ThisABI(ThisABI) {}
  32
  33   static MipsABIInfo Unknown() { return MipsABIInfo(ABI::Unknown); }
  34   static MipsABIInfo O32() { return MipsABIInfo(ABI::O32); }
  35   static MipsABIInfo N32() { return MipsABIInfo(ABI::N32); }
  36   static MipsABIInfo N64() { return MipsABIInfo(ABI::N64); }
  37   static MipsABIInfo computeTargetABI(const Triple &TT, StringRef CPU,
  38                                       const MCTargetOptions &Options);
  39
  40   bool IsKnown() const { return ThisABI != ABI::Unknown; }
  41   bool IsO32() const { return ThisABI == ABI::O32; }
  42   bool IsN32() const { return ThisABI == ABI::N32; }
  43   bool IsN64() const { return ThisABI == ABI::N64; }
  44   ABI GetEnumValue() const { return ThisABI; }
  45
  46   /// The registers to use for byval arguments.
  47   ArrayRef<MCPhysReg> GetByValArgRegs() const;
  48
  49   /// The registers to use for the variable argument list.
  50   ArrayRef<MCPhysReg> GetVarArgRegs() const;
  51
  52   /// Obtain the size of the area allocated by the callee for arguments.
  53   /// CallingConv::FastCall affects the value for O32.
  54   unsigned GetCalleeAllocdArgSizeInBytes(CallingConv::ID CC) const;
  55
  56   /// Ordering of ABI's
  57   /// MipsGenSubtargetInfo.inc will use this to resolve conflicts when given
  58   /// multiple ABI options.
  59   bool operator<(const MipsABIInfo Other) const {
  60     return ThisABI < Other.GetEnumValue();
  61   }
  62
  63   unsigned GetStackPtr() const;
  64   unsigned GetFramePtr() const;
  65   unsigned GetBasePtr() const;
  66   unsigned GetGlobalPtr() const;
  67   unsigned GetNullPtr() const;
  68   unsigned GetZeroReg() const;
  69   unsigned GetPtrAdduOp() const;
  70   unsigned GetPtrAddiuOp() const;
  71   unsigned GetPtrSubuOp() const;
  72   unsigned GetPtrAndOp() const;
  73   unsigned GetGPRMoveOp() const;
  74   inline bool ArePtrs64bit() const { return IsN64(); }
  75   inline bool AreGprs64bit() const { return IsN32() || IsN64(); }
  76
  77   unsigned GetEhDataReg(unsigned I) const;
  78 };
  79 }
  80
  81 #endif