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Andrew Scull5e1ddfa2018-08-14 10:06:54 +01001//===- llvm/MC/MachineLocation.h --------------------------------*- C++ -*-===//
2//
3// The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9// The MachineLocation class is used to represent a simple location in a machine
10// frame. Locations will be one of two forms; a register or an address formed
11// from a base address plus an offset. Register indirection can be specified by
12// explicitly passing an offset to the constructor.
13//===----------------------------------------------------------------------===//
14
15#ifndef LLVM_MC_MACHINELOCATION_H
16#define LLVM_MC_MACHINELOCATION_H
17
18#include <cstdint>
19#include <cassert>
20
21namespace llvm {
22
23class MachineLocation {
24private:
25 bool IsRegister = false; ///< True if location is a register.
26 unsigned Register = 0; ///< gcc/gdb register number.
27
28public:
29 enum : uint32_t {
30 // The target register number for an abstract frame pointer. The value is
31 // an arbitrary value that doesn't collide with any real target register.
32 VirtualFP = ~0U
33 };
34
35 MachineLocation() = default;
36 /// Create a direct register location.
37 explicit MachineLocation(unsigned R, bool Indirect = false)
38 : IsRegister(!Indirect), Register(R) {}
39
40 bool operator==(const MachineLocation &Other) const {
41 return IsRegister == Other.IsRegister && Register == Other.Register;
42 }
43
44 // Accessors.
45 /// \return true iff this is a register-indirect location.
46 bool isIndirect() const { return !IsRegister; }
47 bool isReg() const { return IsRegister; }
48 unsigned getReg() const { return Register; }
49 void setIsRegister(bool Is) { IsRegister = Is; }
50 void setRegister(unsigned R) { Register = R; }
51};
52
53inline bool operator!=(const MachineLocation &LHS, const MachineLocation &RHS) {
54 return !(LHS == RHS);
55}
56
57} // end namespace llvm
58
59#endif // LLVM_MC_MACHINELOCATION_H