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//===-- 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 LLVM_LIB_TARGET_POWERPC_PPCMACHINEFUNCTIONINFO_H
#define LLVM_LIB_TARGET_POWERPC_PPCMACHINEFUNCTIONINFO_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 {
virtual void anchor();
/// 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;
/// Frame index where the old base pointer is stored.
int BasePointerSaveIndex;
/// Frame index where the old PIC base pointer is stored.
int PICBasePointerSaveIndex;
/// MustSaveLR - Indicates whether LR is defined (or clobbered) in the current
/// function. This is only valid after the initial scan of the function by
/// PEI.
bool MustSaveLR;
/// Does this function have any stack spills.
bool HasSpills;
/// Does this function spill using instructions with only r+r (not r+i)
/// forms.
bool HasNonRISpills;
/// SpillsCR - Indicates whether CR is spilled in the current function.
bool SpillsCR;
/// Indicates whether VRSAVE is spilled in the current function.
bool SpillsVRSAVE;
/// 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;
/// This function makes use of the PPC64 ELF TOC base pointer (register r2).
bool UsesTOCBasePtr;
/// 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;
/// VarArgsFrameIndex - FrameIndex for start of varargs area.
int VarArgsFrameIndex;
/// VarArgsStackOffset - StackOffset for start of stack
/// arguments.
int VarArgsStackOffset;
/// VarArgsNumGPR - Index of the first unused integer
/// register for parameter passing.
unsigned VarArgsNumGPR;
/// VarArgsNumFPR - Index of the first unused double
/// register for parameter passing.
unsigned VarArgsNumFPR;
/// CRSpillFrameIndex - FrameIndex for CR spill slot for 32-bit SVR4.
int CRSpillFrameIndex;
/// If any of CR[2-4] need to be saved in the prologue and restored in the
/// epilogue then they are added to this array. This is used for the
/// 64-bit SVR4 ABI.
SmallVector<unsigned, 3> MustSaveCRs;
/// Hold onto our MachineFunction context.
MachineFunction &MF;
/// Whether this uses the PIC Base register or not.
bool UsesPICBase;
public:
explicit PPCFunctionInfo(MachineFunction &MF)
: FramePointerSaveIndex(0),
ReturnAddrSaveIndex(0),
BasePointerSaveIndex(0),
PICBasePointerSaveIndex(0),
HasSpills(false),
HasNonRISpills(false),
SpillsCR(false),
SpillsVRSAVE(false),
LRStoreRequired(false),
UsesTOCBasePtr(false),
MinReservedArea(0),
TailCallSPDelta(0),
HasFastCall(false),
VarArgsFrameIndex(0),
VarArgsStackOffset(0),
VarArgsNumGPR(0),
VarArgsNumFPR(0),
CRSpillFrameIndex(0),
MF(MF),
UsesPICBase(0) {}
int getFramePointerSaveIndex() const { return FramePointerSaveIndex; }
void setFramePointerSaveIndex(int Idx) { FramePointerSaveIndex = Idx; }
int getReturnAddrSaveIndex() const { return ReturnAddrSaveIndex; }
void setReturnAddrSaveIndex(int idx) { ReturnAddrSaveIndex = idx; }
int getBasePointerSaveIndex() const { return BasePointerSaveIndex; }
void setBasePointerSaveIndex(int Idx) { BasePointerSaveIndex = Idx; }
int getPICBasePointerSaveIndex() const { return PICBasePointerSaveIndex; }
void setPICBasePointerSaveIndex(int Idx) { PICBasePointerSaveIndex = Idx; }
unsigned getMinReservedArea() const { return MinReservedArea; }
void setMinReservedArea(unsigned size) { MinReservedArea = size; }
int getTailCallSPDelta() const { return TailCallSPDelta; }
void setTailCallSPDelta(int size) { TailCallSPDelta = size; }
/// MustSaveLR - 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
/// defined/clobbered in the machine function (e.g. by calls and movpctolr,
/// which is used in PIC generation), or if the LR stack slot is explicitly
/// referenced by builtin_return_address.
void setMustSaveLR(bool U) { MustSaveLR = U; }
bool mustSaveLR() const { return MustSaveLR; }
void setHasSpills() { HasSpills = true; }
bool hasSpills() const { return HasSpills; }
void setHasNonRISpills() { HasNonRISpills = true; }
bool hasNonRISpills() const { return HasNonRISpills; }
void setSpillsCR() { SpillsCR = true; }
bool isCRSpilled() const { return SpillsCR; }
void setSpillsVRSAVE() { SpillsVRSAVE = true; }
bool isVRSAVESpilled() const { return SpillsVRSAVE; }
void setLRStoreRequired() { LRStoreRequired = true; }
bool isLRStoreRequired() const { return LRStoreRequired; }
void setUsesTOCBasePtr() { UsesTOCBasePtr = true; }
bool usesTOCBasePtr() const { return UsesTOCBasePtr; }
void setHasFastCall() { HasFastCall = true; }
bool hasFastCall() const { return HasFastCall;}
int getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; }
int getVarArgsStackOffset() const { return VarArgsStackOffset; }
void setVarArgsStackOffset(int Offset) { VarArgsStackOffset = Offset; }
unsigned getVarArgsNumGPR() const { return VarArgsNumGPR; }
void setVarArgsNumGPR(unsigned Num) { VarArgsNumGPR = Num; }
unsigned getVarArgsNumFPR() const { return VarArgsNumFPR; }
void setVarArgsNumFPR(unsigned Num) { VarArgsNumFPR = Num; }
int getCRSpillFrameIndex() const { return CRSpillFrameIndex; }
void setCRSpillFrameIndex(int idx) { CRSpillFrameIndex = idx; }
const SmallVectorImpl<unsigned> &
getMustSaveCRs() const { return MustSaveCRs; }
void addMustSaveCR(unsigned Reg) { MustSaveCRs.push_back(Reg); }
void setUsesPICBase(bool uses) { UsesPICBase = uses; }
bool usesPICBase() const { return UsesPICBase; }
MCSymbol *getPICOffsetSymbol() const;
MCSymbol *getGlobalEPSymbol() const;
MCSymbol *getLocalEPSymbol() const;
MCSymbol *getTOCOffsetSymbol() const;
};
} // end of namespace llvm
#endif