llvm/lib/Target/AVR/AVRMachineFunctionInfo.h

   1 //===-- AVRMachineFuctionInfo.h - AVR machine function info -----*- 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 // This file declares AVR-specific per-machine-function information.
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 #ifndef LLVM_AVR_MACHINE_FUNCTION_INFO_H
  14 #define LLVM_AVR_MACHINE_FUNCTION_INFO_H
  15
  16 #include "llvm/CodeGen/MachineFunction.h"
  17
  18 namespace llvm {
  19
  20 /// Contains AVR-specific information for each MachineFunction.
  21 class AVRMachineFunctionInfo : public MachineFunctionInfo {
  22   /// Indicates if a register has been spilled by the register
  23   /// allocator.
  24   bool HasSpills;
  25
  26   /// Indicates if there are any fixed size allocas present.
  27   /// Note that if there are only variable sized allocas this is set to false.
  28   bool HasAllocas;
  29
  30   /// Indicates if arguments passed using the stack are being
  31   /// used inside the function.
  32   bool HasStackArgs;
  33
  34   /// Whether or not the function is an interrupt handler.
  35   bool IsInterruptHandler;
  36
  37   /// Whether or not the function is an non-blocking interrupt handler.
  38   bool IsSignalHandler;
  39
  40   /// Size of the callee-saved register portion of the
  41   /// stack frame in bytes.
  42   unsigned CalleeSavedFrameSize;
  43
  44   /// FrameIndex for start of varargs area.
  45   int VarArgsFrameIndex;
  46
  47 public:
  48   AVRMachineFunctionInfo()
  49       : HasSpills(false), HasAllocas(false), HasStackArgs(false),
  50         IsInterruptHandler(false), IsSignalHandler(false),
  51         CalleeSavedFrameSize(0), VarArgsFrameIndex(0) {}
  52
  53   explicit AVRMachineFunctionInfo(MachineFunction &MF)
  54       : HasSpills(false), HasAllocas(false), HasStackArgs(false),
  55         CalleeSavedFrameSize(0), VarArgsFrameIndex(0) {
  56     unsigned CallConv = MF.getFunction().getCallingConv();
  57
  58     this->IsInterruptHandler = CallConv == CallingConv::AVR_INTR || MF.getFunction().hasFnAttribute("interrupt");
  59     this->IsSignalHandler = CallConv == CallingConv::AVR_SIGNAL || MF.getFunction().hasFnAttribute("signal");
  60   }
  61
  62   bool getHasSpills() const { return HasSpills; }
  63   void setHasSpills(bool B) { HasSpills = B; }
  64
  65   bool getHasAllocas() const { return HasAllocas; }
  66   void setHasAllocas(bool B) { HasAllocas = B; }
  67
  68   bool getHasStackArgs() const { return HasStackArgs; }
  69   void setHasStackArgs(bool B) { HasStackArgs = B; }
  70
  71   /// Checks if the function is some form of interrupt service routine.
  72   bool isInterruptOrSignalHandler() const { return isInterruptHandler() || isSignalHandler(); }
  73
  74   bool isInterruptHandler() const { return IsInterruptHandler; }
  75   bool isSignalHandler() const { return IsSignalHandler; }
  76
  77   unsigned getCalleeSavedFrameSize() const { return CalleeSavedFrameSize; }
  78   void setCalleeSavedFrameSize(unsigned Bytes) { CalleeSavedFrameSize = Bytes; }
  79
  80   int getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
  81   void setVarArgsFrameIndex(int Idx) { VarArgsFrameIndex = Idx; }
  82 };
  83
  84 } // end llvm namespace
  85
  86 #endif // LLVM_AVR_MACHINE_FUNCTION_INFO_H