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 /// MustSaveLR - Indicates whether LR is defined (or clobbered) in the current 36 /// function. This is only valid after the initial scan of the function by 37 /// PEI. 38 bool MustSaveLR; 39 40 /// Does this function have any stack spills. 41 bool HasSpills; 42 43 /// Does this function spill using instructions with only r+r (not r+i) 44 /// forms. 45 bool HasNonRISpills; 46 47 /// SpillsCR - Indicates whether CR is spilled in the current function. 48 bool SpillsCR; 49 50 /// LRStoreRequired - The bool indicates whether there is some explicit use of 51 /// the LR/LR8 stack slot that is not obvious from scanning the code. This 52 /// requires that the code generator produce a store of LR to the stack on 53 /// entry, even though LR may otherwise apparently not be used. 54 bool LRStoreRequired; 55 56 /// MinReservedArea - This is the frame size that is at least reserved in a 57 /// potential caller (parameter+linkage area). 58 unsigned MinReservedArea; 59 60 /// TailCallSPDelta - Stack pointer delta used when tail calling. Maximum 61 /// amount the stack pointer is adjusted to make the frame bigger for tail 62 /// calls. Used for creating an area before the register spill area. 63 int TailCallSPDelta; 64 65 /// HasFastCall - Does this function contain a fast call. Used to determine 66 /// how the caller's stack pointer should be calculated (epilog/dynamicalloc). 67 bool HasFastCall; 68 69 /// VarArgsFrameIndex - FrameIndex for start of varargs area. 70 int VarArgsFrameIndex; 71 /// VarArgsStackOffset - StackOffset for start of stack 72 /// arguments. 73 int VarArgsStackOffset; 74 /// VarArgsNumGPR - Index of the first unused integer 75 /// register for parameter passing. 76 unsigned VarArgsNumGPR; 77 /// VarArgsNumFPR - Index of the first unused double 78 /// register for parameter passing. 79 unsigned VarArgsNumFPR; 80 81 /// CRSpillFrameIndex - FrameIndex for CR spill slot for 32-bit SVR4. 82 int CRSpillFrameIndex; 83 84 public: 85 explicit PPCFunctionInfo(MachineFunction &MF) 86 : FramePointerSaveIndex(0), 87 ReturnAddrSaveIndex(0), 88 HasSpills(false), 89 HasNonRISpills(false), 90 SpillsCR(false), 91 LRStoreRequired(false), 92 MinReservedArea(0), 93 TailCallSPDelta(0), 94 HasFastCall(false), 95 VarArgsFrameIndex(0), 96 VarArgsStackOffset(0), 97 VarArgsNumGPR(0), 98 VarArgsNumFPR(0), 99 CRSpillFrameIndex(0) {} 100 101 int getFramePointerSaveIndex() const { return FramePointerSaveIndex; } 102 void setFramePointerSaveIndex(int Idx) { FramePointerSaveIndex = Idx; } 103 104 int getReturnAddrSaveIndex() const { return ReturnAddrSaveIndex; } 105 void setReturnAddrSaveIndex(int idx) { ReturnAddrSaveIndex = idx; } 106 107 unsigned getMinReservedArea() const { return MinReservedArea; } 108 void setMinReservedArea(unsigned size) { MinReservedArea = size; } 109 110 int getTailCallSPDelta() const { return TailCallSPDelta; } 111 void setTailCallSPDelta(int size) { TailCallSPDelta = size; } 112 113 /// MustSaveLR - This is set when the prolog/epilog inserter does its initial 114 /// scan of the function. It is true if the LR/LR8 register is ever explicitly 115 /// defined/clobbered in the machine function (e.g. by calls and movpctolr, 116 /// which is used in PIC generation), or if the LR stack slot is explicitly 117 /// referenced by builtin_return_address. 118 void setMustSaveLR(bool U) { MustSaveLR = U; } 119 bool mustSaveLR() const { return MustSaveLR; } 120 121 void setHasSpills() { HasSpills = true; } 122 bool hasSpills() const { return HasSpills; } 123 124 void setHasNonRISpills() { HasNonRISpills = true; } 125 bool hasNonRISpills() const { return HasNonRISpills; } 126 127 void setSpillsCR() { SpillsCR = true; } 128 bool isCRSpilled() const { return SpillsCR; } 129 130 void setLRStoreRequired() { LRStoreRequired = true; } 131 bool isLRStoreRequired() const { return LRStoreRequired; } 132 133 void setHasFastCall() { HasFastCall = true; } 134 bool hasFastCall() const { return HasFastCall;} 135 136 int getVarArgsFrameIndex() const { return VarArgsFrameIndex; } 137 void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; } 138 139 int getVarArgsStackOffset() const { return VarArgsStackOffset; } 140 void setVarArgsStackOffset(int Offset) { VarArgsStackOffset = Offset; } 141 142 unsigned getVarArgsNumGPR() const { return VarArgsNumGPR; } 143 void setVarArgsNumGPR(unsigned Num) { VarArgsNumGPR = Num; } 144 145 unsigned getVarArgsNumFPR() const { return VarArgsNumFPR; } 146 void setVarArgsNumFPR(unsigned Num) { VarArgsNumFPR = Num; } 147 148 int getCRSpillFrameIndex() const { return CRSpillFrameIndex; } 149 void setCRSpillFrameIndex(int idx) { CRSpillFrameIndex = idx; } 150 }; 151 152 } // end of namespace llvm 153 154 155 #endif 156