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