llvm/lib/Target/M68k/M68kMachineFunction.h

   1 //===-- M68kMachineFunctionInfo.h - M68k private data ---------*- C++ -*-=//
   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 /// \file
  10 /// This file declares the M68k specific subclass of MachineFunctionInfo.
  11 ///
  12 //===----------------------------------------------------------------------===//
  13
  14 #ifndef LLVM_LIB_TARGET_M68K_M68KMACHINEFUNCTION_H
  15 #define LLVM_LIB_TARGET_M68K_M68KMACHINEFUNCTION_H
  16
  17 #include "llvm/CodeGen/CallingConvLower.h"
  18 #include "llvm/CodeGen/MachineFunction.h"
  19 #include "llvm/Support/MachineValueType.h"
  20
  21 namespace llvm {
  22
  23 class M68kMachineFunctionInfo : public MachineFunctionInfo {
  24   MachineFunction &MF;
  25
  26   /// Non-zero if the function has base pointer and makes call to
  27   /// llvm.eh.sjlj.setjmp. When non-zero, the value is a displacement from the
  28   /// frame pointer to a slot where the base pointer is stashed.
  29   signed char RestoreBasePointerOffset = 0;
  30
  31   /// Size of the callee-saved register portion of the stack frame in bytes.
  32   unsigned CalleeSavedFrameSize = 0;
  33
  34   /// Number of bytes function pops on return (in addition to the space used by
  35   /// the return address).  Used on windows platform for stdcall & fastcall
  36   /// name decoration
  37   unsigned BytesToPopOnReturn = 0;
  38
  39   /// FrameIndex for return slot.
  40   int ReturnAddrIndex = 0;
  41
  42   /// The number of bytes by which return address stack slot is moved as the
  43   /// result of tail call optimization.
  44   int TailCallReturnAddrDelta = 0;
  45
  46   /// keeps track of the virtual register initialized for use as the global
  47   /// base register. This is used for PIC in some PIC relocation models.
  48   unsigned GlobalBaseReg = 0;
  49
  50   /// FrameIndex for start of varargs area.
  51   int VarArgsFrameIndex = 0;
  52
  53   /// Keeps track of whether this function uses sequences of pushes to pass
  54   /// function parameters.
  55   bool HasPushSequences = false;
  56
  57   /// Some subtargets require that sret lowering includes
  58   /// returning the value of the returned struct in a register. This field
  59   /// holds the virtual register into which the sret argument is passed.
  60   unsigned SRetReturnReg = 0;
  61
  62   /// A list of virtual and physical registers that must be forwarded to every
  63   /// musttail call.
  64   SmallVector<ForwardedRegister, 1> ForwardedMustTailRegParms;
  65
  66   /// The number of bytes on stack consumed by the arguments being passed on
  67   /// the stack.
  68   unsigned ArgumentStackSize = 0;
  69
  70 public:
  71   explicit M68kMachineFunctionInfo(MachineFunction &MF) : MF(MF) {}
  72
  73   bool getRestoreBasePointer() const { return RestoreBasePointerOffset != 0; }
  74   void setRestoreBasePointer(const MachineFunction *MF);
  75   int getRestoreBasePointerOffset() const { return RestoreBasePointerOffset; }
  76
  77   unsigned getCalleeSavedFrameSize() const { return CalleeSavedFrameSize; }
  78   void setCalleeSavedFrameSize(unsigned bytes) { CalleeSavedFrameSize = bytes; }
  79
  80   unsigned getBytesToPopOnReturn() const { return BytesToPopOnReturn; }
  81   void setBytesToPopOnReturn(unsigned bytes) { BytesToPopOnReturn = bytes; }
  82
  83   int getRAIndex() const { return ReturnAddrIndex; }
  84   void setRAIndex(int Index) { ReturnAddrIndex = Index; }
  85
  86   int getTCReturnAddrDelta() const { return TailCallReturnAddrDelta; }
  87   void setTCReturnAddrDelta(int delta) { TailCallReturnAddrDelta = delta; }
  88
  89   unsigned getGlobalBaseReg() const { return GlobalBaseReg; }
  90   void setGlobalBaseReg(unsigned Reg) { GlobalBaseReg = Reg; }
  91
  92   int getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
  93   void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; }
  94
  95   bool getHasPushSequences() const { return HasPushSequences; }
  96   void setHasPushSequences(bool HasPush) { HasPushSequences = HasPush; }
  97
  98   unsigned getSRetReturnReg() const { return SRetReturnReg; }
  99   void setSRetReturnReg(unsigned Reg) { SRetReturnReg = Reg; }
 100
 101   unsigned getArgumentStackSize() const { return ArgumentStackSize; }
 102   void setArgumentStackSize(unsigned size) { ArgumentStackSize = size; }
 103
 104   SmallVectorImpl<ForwardedRegister> &getForwardedMustTailRegParms() {
 105     return ForwardedMustTailRegParms;
 106   }
 107
 108 private:
 109   virtual void anchor();
 110 };
 111
 112 } // end of namespace llvm
 113
 114 #endif // M68K_MACHINE_FUNCTION_INFO_H