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//===-- PPCMachineFunctionInfo.h - Private data used for PowerPC --*- C++ -*-=//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by James M. Laskey and is distributed under
// the University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file declares the PowerPC specific subclass of MachineFunctionInfo.
//
//===----------------------------------------------------------------------===//
#ifndef PPC_MACHINE_FUNCTION_INFO_H
#define PPC_MACHINE_FUNCTION_INFO_H
#include "llvm/CodeGen/MachineFunction.h"
namespace llvm {
/// PPCFunctionInfo - This class is derived from MachineFunction private
/// PowerPC target-specific information for each MachineFunction.
class PPCFunctionInfo : public MachineFunctionInfo {
private:
/// FramePointerSaveIndex - Frame index of where the old frame pointer is
/// stored. Also used as an anchor for instructions that need to be altered
/// when using frame pointers (dyna_add, dyna_sub.)
int FramePointerSaveIndex;
/// UsesLR - Indicates whether LR is used in the current function.
///
bool UsesLR;
public:
PPCFunctionInfo(MachineFunction& MF)
: FramePointerSaveIndex(0)
{}
int getFramePointerSaveIndex() const { return FramePointerSaveIndex; }
void setFramePointerSaveIndex(int Idx) { FramePointerSaveIndex = Idx; }
/// UsesLR - This is set when the prolog/epilog inserter does its initial scan
/// of the function, it is true if the LR/LR8 register is ever explicitly
/// accessed/clobbered in the machine function (e.g. by calls and movpctolr,
/// which is used in PIC generation).
void setUsesLR(bool U) { UsesLR = U; }
bool usesLR() const { return UsesLR; }
};
} // end of namespace llvm
#endif
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