forked from OSchip/llvm-project
103 lines
3.8 KiB
C++
103 lines
3.8 KiB
C++
//===-- PPCMachineFunctionInfo.h - Private data used for PowerPC --*- C++ -*-=//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file 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;
|
|
|
|
/// ReturnAddrSaveIndex - Frame index of where the return address is stored.
|
|
///
|
|
int ReturnAddrSaveIndex;
|
|
|
|
/// UsesLR - Indicates whether LR is used in the current function. This is
|
|
/// only valid after the initial scan of the function by PEI.
|
|
bool UsesLR;
|
|
|
|
/// SpillsCR - Indicates whether CR is spilled in the current function.
|
|
bool SpillsCR;
|
|
|
|
/// LRStoreRequired - The bool indicates whether there is some explicit use of
|
|
/// the LR/LR8 stack slot that is not obvious from scanning the code. This
|
|
/// requires that the code generator produce a store of LR to the stack on
|
|
/// entry, even though LR may otherwise apparently not be used.
|
|
bool LRStoreRequired;
|
|
|
|
/// MinReservedArea - This is the frame size that is at least reserved in a
|
|
/// potential caller (parameter+linkage area).
|
|
unsigned MinReservedArea;
|
|
|
|
/// TailCallSPDelta - Stack pointer delta used when tail calling. Maximum
|
|
/// amount the stack pointer is adjusted to make the frame bigger for tail
|
|
/// calls. Used for creating an area before the register spill area.
|
|
int TailCallSPDelta;
|
|
|
|
/// HasFastCall - Does this function contain a fast call. Used to determine
|
|
/// how the caller's stack pointer should be calculated (epilog/dynamicalloc).
|
|
bool HasFastCall;
|
|
|
|
public:
|
|
PPCFunctionInfo(MachineFunction &MF)
|
|
: FramePointerSaveIndex(0),
|
|
ReturnAddrSaveIndex(0),
|
|
SpillsCR(false),
|
|
LRStoreRequired(false),
|
|
MinReservedArea(0),
|
|
TailCallSPDelta(0),
|
|
HasFastCall(false) {}
|
|
|
|
int getFramePointerSaveIndex() const { return FramePointerSaveIndex; }
|
|
void setFramePointerSaveIndex(int Idx) { FramePointerSaveIndex = Idx; }
|
|
|
|
int getReturnAddrSaveIndex() const { return ReturnAddrSaveIndex; }
|
|
void setReturnAddrSaveIndex(int idx) { ReturnAddrSaveIndex = idx; }
|
|
|
|
unsigned getMinReservedArea() const { return MinReservedArea; }
|
|
void setMinReservedArea(unsigned size) { MinReservedArea = size; }
|
|
|
|
int getTailCallSPDelta() const { return TailCallSPDelta; }
|
|
void setTailCallSPDelta(int size) { TailCallSPDelta = size; }
|
|
|
|
/// 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; }
|
|
|
|
void setSpillsCR() { SpillsCR = true; }
|
|
bool isCRSpilled() const { return SpillsCR; }
|
|
|
|
void setLRStoreRequired() { LRStoreRequired = true; }
|
|
bool isLRStoreRequired() const { return LRStoreRequired; }
|
|
|
|
void setHasFastCall() { HasFastCall = true; }
|
|
bool hasFastCall() const { return HasFastCall;}
|
|
};
|
|
|
|
} // end of namespace llvm
|
|
|
|
|
|
#endif
|