1 //===---- MipsABIInfo.h - Information about MIPS ABI's --------------------===//
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 #ifndef MIPSABIINFO_H
11 #define MIPSABIINFO_H
12 
13 #include "llvm/ADT/ArrayRef.h"
14 #include "llvm/IR/CallingConv.h"
15 #include "llvm/MC/MCRegisterInfo.h"
16 
17 namespace llvm {
18 
19 class MipsABIInfo {
20 public:
21   enum class ABI { Unknown, O32, N32, N64, EABI };
22 
23 protected:
24   ABI ThisABI;
25 
26 public:
MipsABIInfo(ABI ThisABI)27   MipsABIInfo(ABI ThisABI) : ThisABI(ThisABI) {}
28 
Unknown()29   static MipsABIInfo Unknown() { return MipsABIInfo(ABI::Unknown); }
O32()30   static MipsABIInfo O32() { return MipsABIInfo(ABI::O32); }
N32()31   static MipsABIInfo N32() { return MipsABIInfo(ABI::N32); }
N64()32   static MipsABIInfo N64() { return MipsABIInfo(ABI::N64); }
EABI()33   static MipsABIInfo EABI() { return MipsABIInfo(ABI::EABI); }
34 
IsKnown()35   bool IsKnown() const { return ThisABI != ABI::Unknown; }
IsO32()36   bool IsO32() const { return ThisABI == ABI::O32; }
IsN32()37   bool IsN32() const { return ThisABI == ABI::N32; }
IsN64()38   bool IsN64() const { return ThisABI == ABI::N64; }
IsEABI()39   bool IsEABI() const { return ThisABI == ABI::EABI; }
GetEnumValue()40   ABI GetEnumValue() const { return ThisABI; }
41 
42   /// The registers to use for byval arguments.
43   const ArrayRef<MCPhysReg> GetByValArgRegs() const;
44 
45   /// The registers to use for the variable argument list.
46   const ArrayRef<MCPhysReg> GetVarArgRegs() const;
47 
48   /// Obtain the size of the area allocated by the callee for arguments.
49   /// CallingConv::FastCall affects the value for O32.
50   unsigned GetCalleeAllocdArgSizeInBytes(CallingConv::ID CC) const;
51 
52   /// Ordering of ABI's
53   /// MipsGenSubtargetInfo.inc will use this to resolve conflicts when given
54   /// multiple ABI options.
55   bool operator<(const MipsABIInfo Other) const {
56     return ThisABI < Other.GetEnumValue();
57   }
58 };
59 }
60 
61 #endif
62