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-rw-r--r--include/llvm/CodeGen/MachineLocation.h98
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diff --git a/include/llvm/CodeGen/MachineLocation.h b/include/llvm/CodeGen/MachineLocation.h
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-//===-- llvm/CodeGen/MachineLocation.h --------------------------*- C++ -*-===//
-//
-// The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-// The MachineLocation class is used to represent a simple location in a machine
-// frame. Locations will be one of two forms; a register or an address formed
-// from a base address plus an offset. Register indirection can be specified by
-// using an offset of zero.
-//
-// The MachineMove class is used to represent abstract move operations in the
-// prolog/epilog of a compiled function. A collection of these objects can be
-// used by a debug consumer to track the location of values when unwinding stack
-// frames.
-//===----------------------------------------------------------------------===//
-
-
-#ifndef LLVM_CODEGEN_MACHINELOCATION_H
-#define LLVM_CODEGEN_MACHINELOCATION_H
-
-namespace llvm {
- class MCSymbol;
-
-class MachineLocation {
-private:
- bool IsRegister; // True if location is a register.
- unsigned Register; // gcc/gdb register number.
- int Offset; // Displacement if not register.
-public:
- enum {
- // The target register number for an abstract frame pointer. The value is
- // an arbitrary value that doesn't collide with any real target register.
- VirtualFP = ~0U
- };
- MachineLocation()
- : IsRegister(false), Register(0), Offset(0) {}
- explicit MachineLocation(unsigned R)
- : IsRegister(true), Register(R), Offset(0) {}
- MachineLocation(unsigned R, int O)
- : IsRegister(false), Register(R), Offset(O) {}
-
- bool operator==(const MachineLocation &Other) const {
- return IsRegister == Other.IsRegister && Register == Other.Register &&
- Offset == Other.Offset;
- }
-
- // Accessors
- bool isReg() const { return IsRegister; }
- unsigned getReg() const { return Register; }
- int getOffset() const { return Offset; }
- void setIsRegister(bool Is) { IsRegister = Is; }
- void setRegister(unsigned R) { Register = R; }
- void setOffset(int O) { Offset = O; }
- void set(unsigned R) {
- IsRegister = true;
- Register = R;
- Offset = 0;
- }
- void set(unsigned R, int O) {
- IsRegister = false;
- Register = R;
- Offset = O;
- }
-
-#ifndef NDEBUG
- void dump();
-#endif
-};
-
-/// MachineMove - This class represents the save or restore of a callee saved
-/// register that exception or debug info needs to know about.
-class MachineMove {
-private:
- /// Label - Symbol for post-instruction address when result of move takes
- /// effect.
- MCSymbol *Label;
-
- // Move to & from location.
- MachineLocation Destination, Source;
-public:
- MachineMove() : Label(0) {}
-
- MachineMove(MCSymbol *label, const MachineLocation &D,
- const MachineLocation &S)
- : Label(label), Destination(D), Source(S) {}
-
- // Accessors
- MCSymbol *getLabel() const { return Label; }
- const MachineLocation &getDestination() const { return Destination; }
- const MachineLocation &getSource() const { return Source; }
-};
-
-} // End llvm namespace
-
-#endif
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