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80 lines
2.7 KiB
C++
80 lines
2.7 KiB
C++
//===-- llvm/MC/MachineLocation.h -------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// The MachineLocation class is used to represent a simple location in a machine
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// frame. Locations will be one of two forms; a register or an address formed
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// from a base address plus an offset. Register indirection can be specified by
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// explicitly passing an offset to the constructor.
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_MC_MACHINELOCATION_H
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#define LLVM_MC_MACHINELOCATION_H
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#include "llvm/Support/Compiler.h"
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#include "llvm/Support/DataTypes.h"
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namespace llvm {
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class MCSymbol;
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class MachineLocation {
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private:
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bool IsRegister; // True if location is a register.
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unsigned Register; // gcc/gdb register number.
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int Offset; // Displacement if not register.
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public:
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enum : uint32_t {
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// The target register number for an abstract frame pointer. The value is
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// an arbitrary value that doesn't collide with any real target register.
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VirtualFP = ~0U
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};
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MachineLocation()
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: IsRegister(false), Register(0), Offset(0) {}
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/// Create a direct register location.
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explicit MachineLocation(unsigned R)
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: IsRegister(true), Register(R), Offset(0) {}
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/// Create a register-indirect location with an offset.
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MachineLocation(unsigned R, int O)
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: IsRegister(false), Register(R), Offset(O) {}
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bool operator==(const MachineLocation &Other) const {
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return IsRegister == Other.IsRegister && Register == Other.Register &&
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Offset == Other.Offset;
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}
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// Accessors.
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/// \return true iff this is a register-indirect location.
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bool isIndirect() const { return !IsRegister; }
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bool isReg() const { return IsRegister; }
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unsigned getReg() const { return Register; }
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int getOffset() const { return Offset; }
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void setIsRegister(bool Is) { IsRegister = Is; }
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void setRegister(unsigned R) { Register = R; }
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void setOffset(int O) { Offset = O; }
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/// Make this location a direct register location.
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void set(unsigned R) {
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IsRegister = true;
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Register = R;
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Offset = 0;
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}
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/// Make this location a register-indirect+offset location.
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void set(unsigned R, int O) {
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IsRegister = false;
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Register = R;
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Offset = O;
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}
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};
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inline bool operator!=(const MachineLocation &LHS, const MachineLocation &RHS) {
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return !(LHS == RHS);
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}
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} // End llvm namespace
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#endif
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