PPCMachineFunctionInfo.h revision 251662
143967Sache//===-- PPCMachineFunctionInfo.h - Private data used for PowerPC --*- C++ -*-=// 26527Sache// 36527Sache// The LLVM Compiler Infrastructure 46527Sache// 56527Sache// This file is distributed under the University of Illinois Open Source 66527Sache// License. See LICENSE.TXT for details. 76527Sache// 86527Sache//===----------------------------------------------------------------------===// 96527Sache// 106527Sache// This file declares the PowerPC specific subclass of MachineFunctionInfo. 116527Sache// 126527Sache//===----------------------------------------------------------------------===// 136527Sache 146527Sache#ifndef PPC_MACHINE_FUNCTION_INFO_H 156527Sache#define PPC_MACHINE_FUNCTION_INFO_H 166527Sache 176527Sache#include "llvm/CodeGen/MachineFunction.h" 186527Sache 196527Sachenamespace llvm { 206527Sache 216527Sache/// PPCFunctionInfo - This class is derived from MachineFunction private 226527Sache/// PowerPC target-specific information for each MachineFunction. 236527Sacheclass PPCFunctionInfo : public MachineFunctionInfo { 246527Sache virtual void anchor(); 256527Sache 266527Sache /// FramePointerSaveIndex - Frame index of where the old frame pointer is 276527Sache /// stored. Also used as an anchor for instructions that need to be altered 286527Sache /// when using frame pointers (dyna_add, dyna_sub.) 2943967Sache int FramePointerSaveIndex; 306527Sache 316527Sache /// ReturnAddrSaveIndex - Frame index of where the return address is stored. 3218950Sache /// 336527Sache int ReturnAddrSaveIndex; 346527Sache 356527Sache /// MustSaveLR - Indicates whether LR is defined (or clobbered) in the current 366527Sache /// function. This is only valid after the initial scan of the function by 376527Sache /// PEI. 3816073Sphk bool MustSaveLR; 396527Sache 4043967Sache /// Does this function have any stack spills. 416527Sache bool HasSpills; 426527Sache 4318950Sache /// Does this function spill using instructions with only r+r (not r+i) 4418955Sache /// forms. 456527Sache bool HasNonRISpills; 466527Sache 476527Sache /// SpillsCR - Indicates whether CR is spilled in the current function. 486527Sache bool SpillsCR; 496527Sache 506527Sache /// Indicates whether VRSAVE is spilled in the current function. 5143967Sache bool SpillsVRSAVE; 5243967Sache 5343967Sache /// LRStoreRequired - The bool indicates whether there is some explicit use of 5443967Sache /// the LR/LR8 stack slot that is not obvious from scanning the code. This 556527Sache /// requires that the code generator produce a store of LR to the stack on 566527Sache /// entry, even though LR may otherwise apparently not be used. 5718950Sache bool LRStoreRequired; 5843967Sache 5943967Sache /// MinReservedArea - This is the frame size that is at least reserved in a 6043967Sache /// potential caller (parameter+linkage area). 6143967Sache unsigned MinReservedArea; 6243967Sache 6343967Sache /// TailCallSPDelta - Stack pointer delta used when tail calling. Maximum 6443967Sache /// amount the stack pointer is adjusted to make the frame bigger for tail 6543967Sache /// calls. Used for creating an area before the register spill area. 6643967Sache int TailCallSPDelta; 6718950Sache 6818950Sache /// HasFastCall - Does this function contain a fast call. Used to determine 6918950Sache /// how the caller's stack pointer should be calculated (epilog/dynamicalloc). 7018950Sache bool HasFastCall; 7118950Sache 7218950Sache /// VarArgsFrameIndex - FrameIndex for start of varargs area. 7318950Sache int VarArgsFrameIndex; 7418950Sache /// VarArgsStackOffset - StackOffset for start of stack 7518950Sache /// arguments. 7618950Sache int VarArgsStackOffset; 7718950Sache /// VarArgsNumGPR - Index of the first unused integer 7818950Sache /// register for parameter passing. 7918950Sache unsigned VarArgsNumGPR; 8018950Sache /// VarArgsNumFPR - Index of the first unused double 8143967Sache /// register for parameter passing. 8218950Sache unsigned VarArgsNumFPR; 8318950Sache 8418950Sache /// CRSpillFrameIndex - FrameIndex for CR spill slot for 32-bit SVR4. 8543967Sache int CRSpillFrameIndex; 866527Sache 876527Sache /// If any of CR[2-4] need to be saved in the prologue and restored in the 886527Sache /// epilogue then they are added to this array. This is used for the 896527Sache /// 64-bit SVR4 ABI. 906527Sache SmallVector<unsigned, 3> MustSaveCRs; 916527Sache 9243967Sachepublic: 936527Sache explicit PPCFunctionInfo(MachineFunction &MF) 946527Sache : FramePointerSaveIndex(0), 956527Sache ReturnAddrSaveIndex(0), 966527Sache HasSpills(false), 976527Sache HasNonRISpills(false), 986527Sache SpillsCR(false), 9918950Sache SpillsVRSAVE(false), 1006527Sache LRStoreRequired(false), 1016527Sache MinReservedArea(0), 1026527Sache TailCallSPDelta(0), 1036527Sache HasFastCall(false), 1046527Sache VarArgsFrameIndex(0), 10543940Sache VarArgsStackOffset(0), 1066527Sache VarArgsNumGPR(0), 1076527Sache VarArgsNumFPR(0), 1086527Sache CRSpillFrameIndex(0) {} 1096527Sache 11043967Sache int getFramePointerSaveIndex() const { return FramePointerSaveIndex; } 11118950Sache void setFramePointerSaveIndex(int Idx) { FramePointerSaveIndex = Idx; } 11218950Sache 11318950Sache int getReturnAddrSaveIndex() const { return ReturnAddrSaveIndex; } 11418950Sache void setReturnAddrSaveIndex(int idx) { ReturnAddrSaveIndex = idx; } 11518950Sache 11618950Sache unsigned getMinReservedArea() const { return MinReservedArea; } 11718950Sache void setMinReservedArea(unsigned size) { MinReservedArea = size; } 11818950Sache 11918950Sache int getTailCallSPDelta() const { return TailCallSPDelta; } 12018950Sache void setTailCallSPDelta(int size) { TailCallSPDelta = size; } 12118950Sache 12218950Sache /// MustSaveLR - This is set when the prolog/epilog inserter does its initial 12318950Sache /// scan of the function. It is true if the LR/LR8 register is ever explicitly 1246527Sache /// defined/clobbered in the machine function (e.g. by calls and movpctolr, 12543940Sache /// which is used in PIC generation), or if the LR stack slot is explicitly 1266527Sache /// referenced by builtin_return_address. 12718950Sache void setMustSaveLR(bool U) { MustSaveLR = U; } 12818950Sache bool mustSaveLR() const { return MustSaveLR; } 12918950Sache 13018950Sache void setHasSpills() { HasSpills = true; } 13143940Sache bool hasSpills() const { return HasSpills; } 13218950Sache 1336527Sache void setHasNonRISpills() { HasNonRISpills = true; } 1346527Sache bool hasNonRISpills() const { return HasNonRISpills; } 1356527Sache 1366527Sache void setSpillsCR() { SpillsCR = true; } 13743940Sache bool isCRSpilled() const { return SpillsCR; } 1386527Sache 1396527Sache void setSpillsVRSAVE() { SpillsVRSAVE = true; } 1406527Sache bool isVRSAVESpilled() const { return SpillsVRSAVE; } 1416527Sache 14218955Sache void setLRStoreRequired() { LRStoreRequired = true; } 14318955Sache bool isLRStoreRequired() const { return LRStoreRequired; } 14418950Sache 14518955Sache void setHasFastCall() { HasFastCall = true; } 14618950Sache bool hasFastCall() const { return HasFastCall;} 1476527Sache 14818955Sache int getVarArgsFrameIndex() const { return VarArgsFrameIndex; } 14918955Sache void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; } 15018955Sache 15118955Sache int getVarArgsStackOffset() const { return VarArgsStackOffset; } 15218955Sache void setVarArgsStackOffset(int Offset) { VarArgsStackOffset = Offset; } 15318955Sache 15418955Sache unsigned getVarArgsNumGPR() const { return VarArgsNumGPR; } 15543967Sache void setVarArgsNumGPR(unsigned Num) { VarArgsNumGPR = Num; } 15643967Sache 15743967Sache unsigned getVarArgsNumFPR() const { return VarArgsNumFPR; } 15843967Sache void setVarArgsNumFPR(unsigned Num) { VarArgsNumFPR = Num; } 15918955Sache 1606527Sache int getCRSpillFrameIndex() const { return CRSpillFrameIndex; } 1616527Sache void setCRSpillFrameIndex(int idx) { CRSpillFrameIndex = idx; } 1626527Sache 1636527Sache const SmallVector<unsigned, 3> & 16443967Sache getMustSaveCRs() const { return MustSaveCRs; } 1656527Sache void addMustSaveCR(unsigned Reg) { MustSaveCRs.push_back(Reg); } 1666527Sache}; 16718950Sache 16818950Sache} // end of namespace llvm 16918950Sache 17018950Sache 17118950Sache#endif 17218950Sache