1 //===-- ARMMachineFuctionInfo.h - ARM machine function info -----*- 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 ARM-specific per-machine-function information. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifndef ARMMACHINEFUNCTIONINFO_H 15 #define ARMMACHINEFUNCTIONINFO_H 16 17 #include "ARMSubtarget.h" 18 #include "llvm/ADT/BitVector.h" 19 #include "llvm/CodeGen/MachineFunction.h" 20 #include "llvm/Target/TargetMachine.h" 21 #include "llvm/Target/TargetRegisterInfo.h" 22 23 namespace llvm { 24 25 /// ARMFunctionInfo - This class is derived from MachineFunctionInfo and 26 /// contains private ARM-specific information for each MachineFunction. 27 class ARMFunctionInfo : public MachineFunctionInfo { 28 virtual void anchor(); 29 30 /// isThumb - True if this function is compiled under Thumb mode. 31 /// Used to initialized Align, so must precede it. 32 bool isThumb; 33 34 /// hasThumb2 - True if the target architecture supports Thumb2. Do not use 35 /// to determine if function is compiled under Thumb mode, for that use 36 /// 'isThumb'. 37 bool hasThumb2; 38 39 /// StByValParamsPadding - For parameter that is split between 40 /// GPRs and memory; while recovering GPRs part, when 41 /// StackAlignment > 4, and GPRs-part-size mod StackAlignment != 0, 42 /// we need to insert gap before parameter start address. It allows to 43 /// "attach" GPR-part to the part that was passed via stack. 44 unsigned StByValParamsPadding; 45 46 /// VarArgsRegSaveSize - Size of the register save area for vararg functions. 47 /// 48 unsigned ArgRegsSaveSize; 49 50 /// HasStackFrame - True if this function has a stack frame. Set by 51 /// processFunctionBeforeCalleeSavedScan(). 52 bool HasStackFrame; 53 54 /// RestoreSPFromFP - True if epilogue should restore SP from FP. Set by 55 /// emitPrologue. 56 bool RestoreSPFromFP; 57 58 /// LRSpilledForFarJump - True if the LR register has been for spilled to 59 /// enable far jump. 60 bool LRSpilledForFarJump; 61 62 /// FramePtrSpillOffset - If HasStackFrame, this records the frame pointer 63 /// spill stack offset. 64 unsigned FramePtrSpillOffset; 65 66 /// GPRCS1Offset, GPRCS2Offset, DPRCSOffset - Starting offset of callee saved 67 /// register spills areas. For Mac OS X: 68 /// 69 /// GPR callee-saved (1) : r4, r5, r6, r7, lr 70 /// -------------------------------------------- 71 /// GPR callee-saved (2) : r8, r10, r11 72 /// -------------------------------------------- 73 /// DPR callee-saved : d8 - d15 74 /// 75 /// Also see AlignedDPRCSRegs below. Not all D-regs need to go in area 3. 76 /// Some may be spilled after the stack has been realigned. 77 unsigned GPRCS1Offset; 78 unsigned GPRCS2Offset; 79 unsigned DPRCSOffset; 80 81 /// GPRCS1Size, GPRCS2Size, DPRCSSize - Sizes of callee saved register spills 82 /// areas. 83 unsigned GPRCS1Size; 84 unsigned GPRCS2Size; 85 unsigned DPRCSSize; 86 87 /// NumAlignedDPRCS2Regs - The number of callee-saved DPRs that are saved in 88 /// the aligned portion of the stack frame. This is always a contiguous 89 /// sequence of D-registers starting from d8. 90 /// 91 /// We do not keep track of the frame indices used for these registers - they 92 /// behave like any other frame index in the aligned stack frame. These 93 /// registers also aren't included in DPRCSSize above. 94 unsigned NumAlignedDPRCS2Regs; 95 96 /// JumpTableUId - Unique id for jumptables. 97 /// 98 unsigned JumpTableUId; 99 100 unsigned PICLabelUId; 101 102 /// VarArgsFrameIndex - FrameIndex for start of varargs area. 103 int VarArgsFrameIndex; 104 105 /// HasITBlocks - True if IT blocks have been inserted. 106 bool HasITBlocks; 107 108 /// CPEClones - Track constant pool entries clones created by Constant Island 109 /// pass. 110 DenseMap<unsigned, unsigned> CPEClones; 111 112 /// GlobalBaseReg - keeps track of the virtual register initialized for 113 /// use as the global base register. This is used for PIC in some PIC 114 /// relocation models. 115 unsigned GlobalBaseReg; 116 117 /// ArgumentStackSize - amount of bytes on stack consumed by the arguments 118 /// being passed on the stack 119 unsigned ArgumentStackSize; 120 121 public: ARMFunctionInfo()122 ARMFunctionInfo() : 123 isThumb(false), 124 hasThumb2(false), 125 ArgRegsSaveSize(0), HasStackFrame(false), RestoreSPFromFP(false), 126 LRSpilledForFarJump(false), 127 FramePtrSpillOffset(0), GPRCS1Offset(0), GPRCS2Offset(0), DPRCSOffset(0), 128 GPRCS1Size(0), GPRCS2Size(0), DPRCSSize(0), 129 NumAlignedDPRCS2Regs(0), 130 JumpTableUId(0), PICLabelUId(0), 131 VarArgsFrameIndex(0), HasITBlocks(false), GlobalBaseReg(0) {} 132 133 explicit ARMFunctionInfo(MachineFunction &MF); 134 isThumbFunction()135 bool isThumbFunction() const { return isThumb; } isThumb1OnlyFunction()136 bool isThumb1OnlyFunction() const { return isThumb && !hasThumb2; } isThumb2Function()137 bool isThumb2Function() const { return isThumb && hasThumb2; } 138 getStoredByValParamsPadding()139 unsigned getStoredByValParamsPadding() const { return StByValParamsPadding; } setStoredByValParamsPadding(unsigned p)140 void setStoredByValParamsPadding(unsigned p) { StByValParamsPadding = p; } 141 142 unsigned getArgRegsSaveSize(unsigned Align = 0) const { 143 if (!Align) 144 return ArgRegsSaveSize; 145 return (ArgRegsSaveSize + Align - 1) & ~(Align - 1); 146 } setArgRegsSaveSize(unsigned s)147 void setArgRegsSaveSize(unsigned s) { ArgRegsSaveSize = s; } 148 hasStackFrame()149 bool hasStackFrame() const { return HasStackFrame; } setHasStackFrame(bool s)150 void setHasStackFrame(bool s) { HasStackFrame = s; } 151 shouldRestoreSPFromFP()152 bool shouldRestoreSPFromFP() const { return RestoreSPFromFP; } setShouldRestoreSPFromFP(bool s)153 void setShouldRestoreSPFromFP(bool s) { RestoreSPFromFP = s; } 154 isLRSpilledForFarJump()155 bool isLRSpilledForFarJump() const { return LRSpilledForFarJump; } setLRIsSpilledForFarJump(bool s)156 void setLRIsSpilledForFarJump(bool s) { LRSpilledForFarJump = s; } 157 getFramePtrSpillOffset()158 unsigned getFramePtrSpillOffset() const { return FramePtrSpillOffset; } setFramePtrSpillOffset(unsigned o)159 void setFramePtrSpillOffset(unsigned o) { FramePtrSpillOffset = o; } 160 getNumAlignedDPRCS2Regs()161 unsigned getNumAlignedDPRCS2Regs() const { return NumAlignedDPRCS2Regs; } setNumAlignedDPRCS2Regs(unsigned n)162 void setNumAlignedDPRCS2Regs(unsigned n) { NumAlignedDPRCS2Regs = n; } 163 getGPRCalleeSavedArea1Offset()164 unsigned getGPRCalleeSavedArea1Offset() const { return GPRCS1Offset; } getGPRCalleeSavedArea2Offset()165 unsigned getGPRCalleeSavedArea2Offset() const { return GPRCS2Offset; } getDPRCalleeSavedAreaOffset()166 unsigned getDPRCalleeSavedAreaOffset() const { return DPRCSOffset; } 167 setGPRCalleeSavedArea1Offset(unsigned o)168 void setGPRCalleeSavedArea1Offset(unsigned o) { GPRCS1Offset = o; } setGPRCalleeSavedArea2Offset(unsigned o)169 void setGPRCalleeSavedArea2Offset(unsigned o) { GPRCS2Offset = o; } setDPRCalleeSavedAreaOffset(unsigned o)170 void setDPRCalleeSavedAreaOffset(unsigned o) { DPRCSOffset = o; } 171 getGPRCalleeSavedArea1Size()172 unsigned getGPRCalleeSavedArea1Size() const { return GPRCS1Size; } getGPRCalleeSavedArea2Size()173 unsigned getGPRCalleeSavedArea2Size() const { return GPRCS2Size; } getDPRCalleeSavedAreaSize()174 unsigned getDPRCalleeSavedAreaSize() const { return DPRCSSize; } 175 setGPRCalleeSavedArea1Size(unsigned s)176 void setGPRCalleeSavedArea1Size(unsigned s) { GPRCS1Size = s; } setGPRCalleeSavedArea2Size(unsigned s)177 void setGPRCalleeSavedArea2Size(unsigned s) { GPRCS2Size = s; } setDPRCalleeSavedAreaSize(unsigned s)178 void setDPRCalleeSavedAreaSize(unsigned s) { DPRCSSize = s; } 179 getArgumentStackSize()180 unsigned getArgumentStackSize() const { return ArgumentStackSize; } setArgumentStackSize(unsigned size)181 void setArgumentStackSize(unsigned size) { ArgumentStackSize = size; } 182 createJumpTableUId()183 unsigned createJumpTableUId() { 184 return JumpTableUId++; 185 } 186 getNumJumpTables()187 unsigned getNumJumpTables() const { 188 return JumpTableUId; 189 } 190 initPICLabelUId(unsigned UId)191 void initPICLabelUId(unsigned UId) { 192 PICLabelUId = UId; 193 } 194 getNumPICLabels()195 unsigned getNumPICLabels() const { 196 return PICLabelUId; 197 } 198 createPICLabelUId()199 unsigned createPICLabelUId() { 200 return PICLabelUId++; 201 } 202 getVarArgsFrameIndex()203 int getVarArgsFrameIndex() const { return VarArgsFrameIndex; } setVarArgsFrameIndex(int Index)204 void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; } 205 hasITBlocks()206 bool hasITBlocks() const { return HasITBlocks; } setHasITBlocks(bool h)207 void setHasITBlocks(bool h) { HasITBlocks = h; } 208 getGlobalBaseReg()209 unsigned getGlobalBaseReg() const { return GlobalBaseReg; } setGlobalBaseReg(unsigned Reg)210 void setGlobalBaseReg(unsigned Reg) { GlobalBaseReg = Reg; } 211 recordCPEClone(unsigned CPIdx,unsigned CPCloneIdx)212 void recordCPEClone(unsigned CPIdx, unsigned CPCloneIdx) { 213 if (!CPEClones.insert(std::make_pair(CPCloneIdx, CPIdx)).second) 214 llvm_unreachable("Duplicate entries!"); 215 } 216 getOriginalCPIdx(unsigned CloneIdx)217 unsigned getOriginalCPIdx(unsigned CloneIdx) const { 218 DenseMap<unsigned, unsigned>::const_iterator I = CPEClones.find(CloneIdx); 219 if (I != CPEClones.end()) 220 return I->second; 221 else 222 return -1U; 223 } 224 }; 225 } // End llvm namespace 226 227 #endif // ARMMACHINEFUNCTIONINFO_H 228