lib/Target/ARC/ARCMachineFunctionInfo.h

   1 //===- ARCMachineFunctionInfo.h - ARC 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 ARC-specific per-machine-function information.
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 #ifndef LLVM_LIB_TARGET_ARC_ARCMACHINEFUNCTIONINFO_H
  14 #define LLVM_LIB_TARGET_ARC_ARCMACHINEFUNCTIONINFO_H
  15
  16 #include "llvm/CodeGen/MachineFunction.h"
  17 #include <vector>
  18
  19 namespace llvm {
  20
  21 /// ARCFunctionInfo - This class is derived from MachineFunction private
  22 /// ARC target-specific information for each MachineFunction.
  23 class ARCFunctionInfo : public MachineFunctionInfo {
  24   virtual void anchor();
  25   bool ReturnStackOffsetSet;
  26   int VarArgsFrameIndex;
  27   unsigned ReturnStackOffset;
  28
  29 public:
  30   ARCFunctionInfo()
  31       : ReturnStackOffsetSet(false), VarArgsFrameIndex(0),
  32         ReturnStackOffset(-1U), MaxCallStackReq(0) {}
  33
  34   explicit ARCFunctionInfo(MachineFunction &MF)
  35       : ReturnStackOffsetSet(false), VarArgsFrameIndex(0),
  36         ReturnStackOffset(-1U), MaxCallStackReq(0) {
  37     // Functions are 4-byte (2**2) aligned.
  38     MF.setAlignment(2);
  39   }
  40
  41   ~ARCFunctionInfo() {}
  42
  43   void setVarArgsFrameIndex(int off) { VarArgsFrameIndex = off; }
  44   int getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
  45
  46   void setReturnStackOffset(unsigned value) {
  47     assert(!ReturnStackOffsetSet && "Return stack offset set twice");
  48     ReturnStackOffset = value;
  49     ReturnStackOffsetSet = true;
  50   }
  51
  52   unsigned getReturnStackOffset() const {
  53     assert(ReturnStackOffsetSet && "Return stack offset not set");
  54     return ReturnStackOffset;
  55   }
  56
  57   unsigned MaxCallStackReq;
  58 };
  59
  60 } // end namespace llvm
  61
  62 #endif // LLVM_LIB_TARGET_ARC_ARCMACHINEFUNCTIONINFO_H