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(const Function &F, const TargetSubtargetInfo *STI)
  49       : HasSpills(false), HasAllocas(false), HasStackArgs(false),
  50         CalleeSavedFrameSize(0), VarArgsFrameIndex(0) {
  51     CallingConv::ID CallConv = F.getCallingConv();
  52
  53     this->IsInterruptHandler =
  54         CallConv == CallingConv::AVR_INTR || F.hasFnAttribute("interrupt");
  55     this->IsSignalHandler =
  56         CallConv == CallingConv::AVR_SIGNAL || F.hasFnAttribute("signal");
  57   }
  58
  59   MachineFunctionInfo *
  60   clone(BumpPtrAllocator &Allocator, MachineFunction &DestMF,
  61         const DenseMap<MachineBasicBlock *, MachineBasicBlock *> &Src2DstMBB)
  62       const override {
  63     return DestMF.cloneInfo<AVRMachineFunctionInfo>(*this);
  64   }
  65
  66   bool getHasSpills() const { return HasSpills; }
  67   void setHasSpills(bool B) { HasSpills = B; }
  68
  69   bool getHasAllocas() const { return HasAllocas; }
  70   void setHasAllocas(bool B) { HasAllocas = B; }
  71
  72   bool getHasStackArgs() const { return HasStackArgs; }
  73   void setHasStackArgs(bool B) { HasStackArgs = B; }
  74
  75   /// Checks if the function is some form of interrupt service routine.
  76   bool isInterruptOrSignalHandler() const {
  77     return isInterruptHandler() || isSignalHandler();
  78   }
  79
  80   bool isInterruptHandler() const { return IsInterruptHandler; }
  81   bool isSignalHandler() const { return IsSignalHandler; }
  82
  83   unsigned getCalleeSavedFrameSize() const { return CalleeSavedFrameSize; }
  84   void setCalleeSavedFrameSize(unsigned Bytes) { CalleeSavedFrameSize = Bytes; }
  85
  86   int getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
  87   void setVarArgsFrameIndex(int Idx) { VarArgsFrameIndex = Idx; }
  88 };
  89
  90 } // namespace llvm
  91
  92 #endif // LLVM_AVR_MACHINE_FUNCTION_INFO_H