1 //===-- PPCMachineFunctionInfo.h - Private data used for PowerPC --*- C++ -*-=// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file declares the PowerPC specific subclass of MachineFunctionInfo. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifndef PPC_MACHINE_FUNCTION_INFO_H 15 #define PPC_MACHINE_FUNCTION_INFO_H 16 17 #include "llvm/CodeGen/MachineFunction.h" 18 19 namespace llvm { 20 21 /// PPCFunctionInfo - This class is derived from MachineFunction private 22 /// PowerPC target-specific information for each MachineFunction. 23 class PPCFunctionInfo : public MachineFunctionInfo { 24 virtual void anchor(); 25 26 /// FramePointerSaveIndex - Frame index of where the old frame pointer is 27 /// stored. Also used as an anchor for instructions that need to be altered 28 /// when using frame pointers (dyna_add, dyna_sub.) 29 int FramePointerSaveIndex; 30 31 /// ReturnAddrSaveIndex - Frame index of where the return address is stored. 32 /// 33 int ReturnAddrSaveIndex; 34 35 /// Frame index where the old base pointer is stored. 36 int BasePointerSaveIndex; 37 38 /// MustSaveLR - Indicates whether LR is defined (or clobbered) in the current 39 /// function. This is only valid after the initial scan of the function by 40 /// PEI. 41 bool MustSaveLR; 42 43 /// Does this function have any stack spills. 44 bool HasSpills; 45 46 /// Does this function spill using instructions with only r+r (not r+i) 47 /// forms. 48 bool HasNonRISpills; 49 50 /// SpillsCR - Indicates whether CR is spilled in the current function. 51 bool SpillsCR; 52 53 /// Indicates whether VRSAVE is spilled in the current function. 54 bool SpillsVRSAVE; 55 56 /// LRStoreRequired - The bool indicates whether there is some explicit use of 57 /// the LR/LR8 stack slot that is not obvious from scanning the code. This 58 /// requires that the code generator produce a store of LR to the stack on 59 /// entry, even though LR may otherwise apparently not be used. 60 bool LRStoreRequired; 61 62 /// MinReservedArea - This is the frame size that is at least reserved in a 63 /// potential caller (parameter+linkage area). 64 unsigned MinReservedArea; 65 66 /// TailCallSPDelta - Stack pointer delta used when tail calling. Maximum 67 /// amount the stack pointer is adjusted to make the frame bigger for tail 68 /// calls. Used for creating an area before the register spill area. 69 int TailCallSPDelta; 70 71 /// HasFastCall - Does this function contain a fast call. Used to determine 72 /// how the caller's stack pointer should be calculated (epilog/dynamicalloc). 73 bool HasFastCall; 74 75 /// VarArgsFrameIndex - FrameIndex for start of varargs area. 76 int VarArgsFrameIndex; 77 /// VarArgsStackOffset - StackOffset for start of stack 78 /// arguments. 79 int VarArgsStackOffset; 80 /// VarArgsNumGPR - Index of the first unused integer 81 /// register for parameter passing. 82 unsigned VarArgsNumGPR; 83 /// VarArgsNumFPR - Index of the first unused double 84 /// register for parameter passing. 85 unsigned VarArgsNumFPR; 86 87 /// CRSpillFrameIndex - FrameIndex for CR spill slot for 32-bit SVR4. 88 int CRSpillFrameIndex; 89 90 /// If any of CR[2-4] need to be saved in the prologue and restored in the 91 /// epilogue then they are added to this array. This is used for the 92 /// 64-bit SVR4 ABI. 93 SmallVector<unsigned, 3> MustSaveCRs; 94 95 public: PPCFunctionInfo(MachineFunction & MF)96 explicit PPCFunctionInfo(MachineFunction &MF) 97 : FramePointerSaveIndex(0), 98 ReturnAddrSaveIndex(0), 99 BasePointerSaveIndex(0), 100 HasSpills(false), 101 HasNonRISpills(false), 102 SpillsCR(false), 103 SpillsVRSAVE(false), 104 LRStoreRequired(false), 105 MinReservedArea(0), 106 TailCallSPDelta(0), 107 HasFastCall(false), 108 VarArgsFrameIndex(0), 109 VarArgsStackOffset(0), 110 VarArgsNumGPR(0), 111 VarArgsNumFPR(0), 112 CRSpillFrameIndex(0) {} 113 getFramePointerSaveIndex()114 int getFramePointerSaveIndex() const { return FramePointerSaveIndex; } setFramePointerSaveIndex(int Idx)115 void setFramePointerSaveIndex(int Idx) { FramePointerSaveIndex = Idx; } 116 getReturnAddrSaveIndex()117 int getReturnAddrSaveIndex() const { return ReturnAddrSaveIndex; } setReturnAddrSaveIndex(int idx)118 void setReturnAddrSaveIndex(int idx) { ReturnAddrSaveIndex = idx; } 119 getBasePointerSaveIndex()120 int getBasePointerSaveIndex() const { return BasePointerSaveIndex; } setBasePointerSaveIndex(int Idx)121 void setBasePointerSaveIndex(int Idx) { BasePointerSaveIndex = Idx; } 122 getMinReservedArea()123 unsigned getMinReservedArea() const { return MinReservedArea; } setMinReservedArea(unsigned size)124 void setMinReservedArea(unsigned size) { MinReservedArea = size; } 125 getTailCallSPDelta()126 int getTailCallSPDelta() const { return TailCallSPDelta; } setTailCallSPDelta(int size)127 void setTailCallSPDelta(int size) { TailCallSPDelta = size; } 128 129 /// MustSaveLR - This is set when the prolog/epilog inserter does its initial 130 /// scan of the function. It is true if the LR/LR8 register is ever explicitly 131 /// defined/clobbered in the machine function (e.g. by calls and movpctolr, 132 /// which is used in PIC generation), or if the LR stack slot is explicitly 133 /// referenced by builtin_return_address. setMustSaveLR(bool U)134 void setMustSaveLR(bool U) { MustSaveLR = U; } mustSaveLR()135 bool mustSaveLR() const { return MustSaveLR; } 136 setHasSpills()137 void setHasSpills() { HasSpills = true; } hasSpills()138 bool hasSpills() const { return HasSpills; } 139 setHasNonRISpills()140 void setHasNonRISpills() { HasNonRISpills = true; } hasNonRISpills()141 bool hasNonRISpills() const { return HasNonRISpills; } 142 setSpillsCR()143 void setSpillsCR() { SpillsCR = true; } isCRSpilled()144 bool isCRSpilled() const { return SpillsCR; } 145 setSpillsVRSAVE()146 void setSpillsVRSAVE() { SpillsVRSAVE = true; } isVRSAVESpilled()147 bool isVRSAVESpilled() const { return SpillsVRSAVE; } 148 setLRStoreRequired()149 void setLRStoreRequired() { LRStoreRequired = true; } isLRStoreRequired()150 bool isLRStoreRequired() const { return LRStoreRequired; } 151 setHasFastCall()152 void setHasFastCall() { HasFastCall = true; } hasFastCall()153 bool hasFastCall() const { return HasFastCall;} 154 getVarArgsFrameIndex()155 int getVarArgsFrameIndex() const { return VarArgsFrameIndex; } setVarArgsFrameIndex(int Index)156 void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; } 157 getVarArgsStackOffset()158 int getVarArgsStackOffset() const { return VarArgsStackOffset; } setVarArgsStackOffset(int Offset)159 void setVarArgsStackOffset(int Offset) { VarArgsStackOffset = Offset; } 160 getVarArgsNumGPR()161 unsigned getVarArgsNumGPR() const { return VarArgsNumGPR; } setVarArgsNumGPR(unsigned Num)162 void setVarArgsNumGPR(unsigned Num) { VarArgsNumGPR = Num; } 163 getVarArgsNumFPR()164 unsigned getVarArgsNumFPR() const { return VarArgsNumFPR; } setVarArgsNumFPR(unsigned Num)165 void setVarArgsNumFPR(unsigned Num) { VarArgsNumFPR = Num; } 166 getCRSpillFrameIndex()167 int getCRSpillFrameIndex() const { return CRSpillFrameIndex; } setCRSpillFrameIndex(int idx)168 void setCRSpillFrameIndex(int idx) { CRSpillFrameIndex = idx; } 169 170 const SmallVectorImpl<unsigned> & getMustSaveCRs()171 getMustSaveCRs() const { return MustSaveCRs; } addMustSaveCR(unsigned Reg)172 void addMustSaveCR(unsigned Reg) { MustSaveCRs.push_back(Reg); } 173 }; 174 175 } // end of namespace llvm 176 177 178 #endif 179