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//===-- PPCMachineFunctionInfo.h - Private data used for PowerPC --*- C++ -*-=//
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// The LLVM Compiler Infrastructure
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//===----------------------------------------------------------------------===//
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// This file declares the PowerPC specific subclass of MachineFunctionInfo.
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_TARGET_POWERPC_PPCMACHINEFUNCTIONINFO_H
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#define LLVM_LIB_TARGET_POWERPC_PPCMACHINEFUNCTIONINFO_H
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#include "llvm/CodeGen/MachineFunction.h"
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/// PPCFunctionInfo - This class is derived from MachineFunction private
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/// PowerPC target-specific information for each MachineFunction.
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class PPCFunctionInfo : public MachineFunctionInfo {
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virtual void anchor();
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/// FramePointerSaveIndex - Frame index of where the old frame pointer is
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/// stored. Also used as an anchor for instructions that need to be altered
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/// when using frame pointers (dyna_add, dyna_sub.)
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int FramePointerSaveIndex;
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/// ReturnAddrSaveIndex - Frame index of where the return address is stored.
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int ReturnAddrSaveIndex;
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/// Frame index where the old base pointer is stored.
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int BasePointerSaveIndex;
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/// Frame index where the old PIC base pointer is stored.
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int PICBasePointerSaveIndex;
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/// MustSaveLR - Indicates whether LR is defined (or clobbered) in the current
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/// function. This is only valid after the initial scan of the function by
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/// Does this function have any stack spills.
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/// Does this function spill using instructions with only r+r (not r+i)
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/// SpillsCR - Indicates whether CR is spilled in the current function.
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/// Indicates whether VRSAVE is spilled in the current function.
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/// LRStoreRequired - The bool indicates whether there is some explicit use of
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/// the LR/LR8 stack slot that is not obvious from scanning the code. This
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/// requires that the code generator produce a store of LR to the stack on
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/// entry, even though LR may otherwise apparently not be used.
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/// This function makes use of the PPC64 ELF TOC base pointer (register r2).
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/// MinReservedArea - This is the frame size that is at least reserved in a
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/// potential caller (parameter+linkage area).
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unsigned MinReservedArea;
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/// TailCallSPDelta - Stack pointer delta used when tail calling. Maximum
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/// amount the stack pointer is adjusted to make the frame bigger for tail
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/// calls. Used for creating an area before the register spill area.
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/// HasFastCall - Does this function contain a fast call. Used to determine
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/// how the caller's stack pointer should be calculated (epilog/dynamicalloc).
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/// VarArgsFrameIndex - FrameIndex for start of varargs area.
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int VarArgsFrameIndex;
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/// VarArgsStackOffset - StackOffset for start of stack
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int VarArgsStackOffset;
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/// VarArgsNumGPR - Index of the first unused integer
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/// register for parameter passing.
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unsigned VarArgsNumGPR;
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/// VarArgsNumFPR - Index of the first unused double
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/// register for parameter passing.
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unsigned VarArgsNumFPR;
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/// CRSpillFrameIndex - FrameIndex for CR spill slot for 32-bit SVR4.
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int CRSpillFrameIndex;
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/// If any of CR[2-4] need to be saved in the prologue and restored in the
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/// epilogue then they are added to this array. This is used for the
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SmallVector<unsigned, 3> MustSaveCRs;
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/// Hold onto our MachineFunction context.
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/// Whether this uses the PIC Base register or not.
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explicit PPCFunctionInfo(MachineFunction &MF)
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: FramePointerSaveIndex(0),
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ReturnAddrSaveIndex(0),
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BasePointerSaveIndex(0),
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PICBasePointerSaveIndex(0),
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HasNonRISpills(false),
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LRStoreRequired(false),
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UsesTOCBasePtr(false),
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VarArgsFrameIndex(0),
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VarArgsStackOffset(0),
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CRSpillFrameIndex(0),
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int getFramePointerSaveIndex() const { return FramePointerSaveIndex; }
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void setFramePointerSaveIndex(int Idx) { FramePointerSaveIndex = Idx; }
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int getReturnAddrSaveIndex() const { return ReturnAddrSaveIndex; }
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void setReturnAddrSaveIndex(int idx) { ReturnAddrSaveIndex = idx; }
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int getBasePointerSaveIndex() const { return BasePointerSaveIndex; }
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void setBasePointerSaveIndex(int Idx) { BasePointerSaveIndex = Idx; }
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int getPICBasePointerSaveIndex() const { return PICBasePointerSaveIndex; }
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void setPICBasePointerSaveIndex(int Idx) { PICBasePointerSaveIndex = Idx; }
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unsigned getMinReservedArea() const { return MinReservedArea; }
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void setMinReservedArea(unsigned size) { MinReservedArea = size; }
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int getTailCallSPDelta() const { return TailCallSPDelta; }
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void setTailCallSPDelta(int size) { TailCallSPDelta = size; }
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/// MustSaveLR - This is set when the prolog/epilog inserter does its initial
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/// scan of the function. It is true if the LR/LR8 register is ever explicitly
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/// defined/clobbered in the machine function (e.g. by calls and movpctolr,
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/// which is used in PIC generation), or if the LR stack slot is explicitly
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/// referenced by builtin_return_address.
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void setMustSaveLR(bool U) { MustSaveLR = U; }
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bool mustSaveLR() const { return MustSaveLR; }
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void setHasSpills() { HasSpills = true; }
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bool hasSpills() const { return HasSpills; }
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void setHasNonRISpills() { HasNonRISpills = true; }
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bool hasNonRISpills() const { return HasNonRISpills; }
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void setSpillsCR() { SpillsCR = true; }
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bool isCRSpilled() const { return SpillsCR; }
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void setSpillsVRSAVE() { SpillsVRSAVE = true; }
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bool isVRSAVESpilled() const { return SpillsVRSAVE; }
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void setLRStoreRequired() { LRStoreRequired = true; }
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bool isLRStoreRequired() const { return LRStoreRequired; }
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void setUsesTOCBasePtr() { UsesTOCBasePtr = true; }
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bool usesTOCBasePtr() const { return UsesTOCBasePtr; }
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void setHasFastCall() { HasFastCall = true; }
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bool hasFastCall() const { return HasFastCall;}
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int getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
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void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; }
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int getVarArgsStackOffset() const { return VarArgsStackOffset; }
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void setVarArgsStackOffset(int Offset) { VarArgsStackOffset = Offset; }
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unsigned getVarArgsNumGPR() const { return VarArgsNumGPR; }
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void setVarArgsNumGPR(unsigned Num) { VarArgsNumGPR = Num; }
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unsigned getVarArgsNumFPR() const { return VarArgsNumFPR; }
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void setVarArgsNumFPR(unsigned Num) { VarArgsNumFPR = Num; }
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int getCRSpillFrameIndex() const { return CRSpillFrameIndex; }
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void setCRSpillFrameIndex(int idx) { CRSpillFrameIndex = idx; }
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const SmallVectorImpl<unsigned> &
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getMustSaveCRs() const { return MustSaveCRs; }
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void addMustSaveCR(unsigned Reg) { MustSaveCRs.push_back(Reg); }
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void setUsesPICBase(bool uses) { UsesPICBase = uses; }
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bool usesPICBase() const { return UsesPICBase; }
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MCSymbol *getPICOffsetSymbol() const;
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} // end of namespace llvm