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annotate include/llvm/MC/MachineLocation.h @ 125:56c5119fbcd2

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fix
author mir3636
date Sun, 03 Dec 2017 20:09:16 +0900
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1 //===- llvm/MC/MachineLocation.h --------------------------------*- C++ -*-===//
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2 //
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3 // The LLVM Compiler Infrastructure
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4 //
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5 // This file is distributed under the University of Illinois Open Source
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6 // License. See LICENSE.TXT for details.
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7 //
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8 //===----------------------------------------------------------------------===//
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9 // The MachineLocation class is used to represent a simple location in a machine
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10 // frame. Locations will be one of two forms; a register or an address formed
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11 // from a base address plus an offset. Register indirection can be specified by
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12 // explicitly passing an offset to the constructor.
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13 //===----------------------------------------------------------------------===//
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15 #ifndef LLVM_MC_MACHINELOCATION_H
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16 #define LLVM_MC_MACHINELOCATION_H
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17
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18 #include <cstdint>
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19 #include <cassert>
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20
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21 namespace llvm {
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22
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23 class MachineLocation {
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24 private:
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25 bool IsRegister = false; ///< True if location is a register.
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26 unsigned Register = 0; ///< gcc/gdb register number.
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27
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28 public:
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29 enum : uint32_t {
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30 // The target register number for an abstract frame pointer. The value is
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31 // an arbitrary value that doesn't collide with any real target register.
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32 VirtualFP = ~0U
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33 };
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34
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35 MachineLocation() = default;
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36 /// Create a direct register location.
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37 explicit MachineLocation(unsigned R, bool Indirect = false)
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38 : IsRegister(!Indirect), Register(R) {}
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40 bool operator==(const MachineLocation &Other) const {
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41 return IsRegister == Other.IsRegister && Register == Other.Register;
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42 }
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43
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44 // Accessors.
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45 /// \return true iff this is a register-indirect location.
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46 bool isIndirect() const { return !IsRegister; }
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47 bool isReg() const { return IsRegister; }
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48 unsigned getReg() const { return Register; }
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49 void setIsRegister(bool Is) { IsRegister = Is; }
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50 void setRegister(unsigned R) { Register = R; }
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51 };
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53 inline bool operator!=(const MachineLocation &LHS, const MachineLocation &RHS) {
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54 return !(LHS == RHS);
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55 }
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56
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57 } // end namespace llvm
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59 #endif // LLVM_MC_MACHINELOCATION_H