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/CodeGen/MachineFunction.h" 19 #include "llvm/Target/TargetRegisterInfo.h" 20 #include "llvm/Target/TargetMachine.h" 21 #include "llvm/ADT/BitVector.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 29 /// isThumb - True if this function is compiled under Thumb mode. 30 /// Used to initialized Align, so must precede it. 31 bool isThumb; 32 33 /// hasThumb2 - True if the target architecture supports Thumb2. Do not use 34 /// to determine if function is compiled under Thumb mode, for that use 35 /// 'isThumb'. 36 bool hasThumb2; 37 38 /// VarArgsRegSaveSize - Size of the register save area for vararg functions. 39 /// 40 unsigned VarArgsRegSaveSize; 41 42 /// HasStackFrame - True if this function has a stack frame. Set by 43 /// processFunctionBeforeCalleeSavedScan(). 44 bool HasStackFrame; 45 46 /// RestoreSPFromFP - True if epilogue should restore SP from FP. Set by 47 /// emitPrologue. 48 bool RestoreSPFromFP; 49 50 /// LRSpilledForFarJump - True if the LR register has been for spilled to 51 /// enable far jump. 52 bool LRSpilledForFarJump; 53 54 /// FramePtrSpillOffset - If HasStackFrame, this records the frame pointer 55 /// spill stack offset. 56 unsigned FramePtrSpillOffset; 57 58 /// GPRCS1Offset, GPRCS2Offset, DPRCSOffset - Starting offset of callee saved 59 /// register spills areas. For Mac OS X: 60 /// 61 /// GPR callee-saved (1) : r4, r5, r6, r7, lr 62 /// -------------------------------------------- 63 /// GPR callee-saved (2) : r8, r10, r11 64 /// -------------------------------------------- 65 /// DPR callee-saved : d8 - d15 66 unsigned GPRCS1Offset; 67 unsigned GPRCS2Offset; 68 unsigned DPRCSOffset; 69 70 /// GPRCS1Size, GPRCS2Size, DPRCSSize - Sizes of callee saved register spills 71 /// areas. 72 unsigned GPRCS1Size; 73 unsigned GPRCS2Size; 74 unsigned DPRCSSize; 75 76 /// GPRCS1Frames, GPRCS2Frames, DPRCSFrames - Keeps track of frame indices 77 /// which belong to these spill areas. 78 BitVector GPRCS1Frames; 79 BitVector GPRCS2Frames; 80 BitVector DPRCSFrames; 81 82 /// JumpTableUId - Unique id for jumptables. 83 /// 84 unsigned JumpTableUId; 85 86 unsigned PICLabelUId; 87 88 /// VarArgsFrameIndex - FrameIndex for start of varargs area. 89 int VarArgsFrameIndex; 90 91 /// HasITBlocks - True if IT blocks have been inserted. 92 bool HasITBlocks; 93 94 /// CPEClones - Track constant pool entries clones created by Constant Island 95 /// pass. 96 DenseMap<unsigned, unsigned> CPEClones; 97 98 public: 99 ARMFunctionInfo() : 100 isThumb(false), 101 hasThumb2(false), 102 VarArgsRegSaveSize(0), HasStackFrame(false), RestoreSPFromFP(false), 103 LRSpilledForFarJump(false), 104 FramePtrSpillOffset(0), GPRCS1Offset(0), GPRCS2Offset(0), DPRCSOffset(0), 105 GPRCS1Size(0), GPRCS2Size(0), DPRCSSize(0), 106 GPRCS1Frames(0), GPRCS2Frames(0), DPRCSFrames(0), 107 JumpTableUId(0), PICLabelUId(0), 108 VarArgsFrameIndex(0), HasITBlocks(false) {} 109 110 explicit ARMFunctionInfo(MachineFunction &MF) : 111 isThumb(MF.getTarget().getSubtarget<ARMSubtarget>().isThumb()), 112 hasThumb2(MF.getTarget().getSubtarget<ARMSubtarget>().hasThumb2()), 113 VarArgsRegSaveSize(0), HasStackFrame(false), RestoreSPFromFP(false), 114 LRSpilledForFarJump(false), 115 FramePtrSpillOffset(0), GPRCS1Offset(0), GPRCS2Offset(0), DPRCSOffset(0), 116 GPRCS1Size(0), GPRCS2Size(0), DPRCSSize(0), 117 GPRCS1Frames(32), GPRCS2Frames(32), DPRCSFrames(32), 118 JumpTableUId(0), PICLabelUId(0), 119 VarArgsFrameIndex(0), HasITBlocks(false) {} 120 121 bool isThumbFunction() const { return isThumb; } 122 bool isThumb1OnlyFunction() const { return isThumb && !hasThumb2; } 123 bool isThumb2Function() const { return isThumb && hasThumb2; } 124 125 unsigned getVarArgsRegSaveSize() const { return VarArgsRegSaveSize; } 126 void setVarArgsRegSaveSize(unsigned s) { VarArgsRegSaveSize = s; } 127 128 bool hasStackFrame() const { return HasStackFrame; } 129 void setHasStackFrame(bool s) { HasStackFrame = s; } 130 131 bool shouldRestoreSPFromFP() const { return RestoreSPFromFP; } 132 void setShouldRestoreSPFromFP(bool s) { RestoreSPFromFP = s; } 133 134 bool isLRSpilledForFarJump() const { return LRSpilledForFarJump; } 135 void setLRIsSpilledForFarJump(bool s) { LRSpilledForFarJump = s; } 136 137 unsigned getFramePtrSpillOffset() const { return FramePtrSpillOffset; } 138 void setFramePtrSpillOffset(unsigned o) { FramePtrSpillOffset = o; } 139 140 unsigned getGPRCalleeSavedArea1Offset() const { return GPRCS1Offset; } 141 unsigned getGPRCalleeSavedArea2Offset() const { return GPRCS2Offset; } 142 unsigned getDPRCalleeSavedAreaOffset() const { return DPRCSOffset; } 143 144 void setGPRCalleeSavedArea1Offset(unsigned o) { GPRCS1Offset = o; } 145 void setGPRCalleeSavedArea2Offset(unsigned o) { GPRCS2Offset = o; } 146 void setDPRCalleeSavedAreaOffset(unsigned o) { DPRCSOffset = o; } 147 148 unsigned getGPRCalleeSavedArea1Size() const { return GPRCS1Size; } 149 unsigned getGPRCalleeSavedArea2Size() const { return GPRCS2Size; } 150 unsigned getDPRCalleeSavedAreaSize() const { return DPRCSSize; } 151 152 void setGPRCalleeSavedArea1Size(unsigned s) { GPRCS1Size = s; } 153 void setGPRCalleeSavedArea2Size(unsigned s) { GPRCS2Size = s; } 154 void setDPRCalleeSavedAreaSize(unsigned s) { DPRCSSize = s; } 155 156 bool isGPRCalleeSavedArea1Frame(int fi) const { 157 if (fi < 0 || fi >= (int)GPRCS1Frames.size()) 158 return false; 159 return GPRCS1Frames[fi]; 160 } 161 bool isGPRCalleeSavedArea2Frame(int fi) const { 162 if (fi < 0 || fi >= (int)GPRCS2Frames.size()) 163 return false; 164 return GPRCS2Frames[fi]; 165 } 166 bool isDPRCalleeSavedAreaFrame(int fi) const { 167 if (fi < 0 || fi >= (int)DPRCSFrames.size()) 168 return false; 169 return DPRCSFrames[fi]; 170 } 171 172 void addGPRCalleeSavedArea1Frame(int fi) { 173 if (fi >= 0) { 174 int Size = GPRCS1Frames.size(); 175 if (fi >= Size) { 176 Size *= 2; 177 if (fi >= Size) 178 Size = fi+1; 179 GPRCS1Frames.resize(Size); 180 } 181 GPRCS1Frames[fi] = true; 182 } 183 } 184 void addGPRCalleeSavedArea2Frame(int fi) { 185 if (fi >= 0) { 186 int Size = GPRCS2Frames.size(); 187 if (fi >= Size) { 188 Size *= 2; 189 if (fi >= Size) 190 Size = fi+1; 191 GPRCS2Frames.resize(Size); 192 } 193 GPRCS2Frames[fi] = true; 194 } 195 } 196 void addDPRCalleeSavedAreaFrame(int fi) { 197 if (fi >= 0) { 198 int Size = DPRCSFrames.size(); 199 if (fi >= Size) { 200 Size *= 2; 201 if (fi >= Size) 202 Size = fi+1; 203 DPRCSFrames.resize(Size); 204 } 205 DPRCSFrames[fi] = true; 206 } 207 } 208 209 unsigned createJumpTableUId() { 210 return JumpTableUId++; 211 } 212 213 unsigned getNumJumpTables() const { 214 return JumpTableUId; 215 } 216 217 void initPICLabelUId(unsigned UId) { 218 PICLabelUId = UId; 219 } 220 221 unsigned getNumPICLabels() const { 222 return PICLabelUId; 223 } 224 225 unsigned createPICLabelUId() { 226 return PICLabelUId++; 227 } 228 229 int getVarArgsFrameIndex() const { return VarArgsFrameIndex; } 230 void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; } 231 232 bool hasITBlocks() const { return HasITBlocks; } 233 void setHasITBlocks(bool h) { HasITBlocks = h; } 234 235 void recordCPEClone(unsigned CPIdx, unsigned CPCloneIdx) { 236 if (!CPEClones.insert(std::make_pair(CPCloneIdx, CPIdx)).second) 237 assert(0 && "Duplicate entries!"); 238 } 239 240 unsigned getOriginalCPIdx(unsigned CloneIdx) const { 241 DenseMap<unsigned, unsigned>::const_iterator I = CPEClones.find(CloneIdx); 242 if (I != CPEClones.end()) 243 return I->second; 244 else 245 return -1U; 246 } 247 }; 248 } // End llvm namespace 249 250 #endif // ARMMACHINEFUNCTIONINFO_H 251
