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 LLVM_LIB_TARGET_ARM_ARMMACHINEFUNCTIONINFO_H 15 #define LLVM_LIB_TARGET_ARM_ARMMACHINEFUNCTIONINFO_H 16 17 #include "ARMSubtarget.h" 18 #include "llvm/ADT/BitVector.h" 19 #include "llvm/ADT/DenseMap.h" 20 #include "llvm/CodeGen/MachineFunction.h" 21 #include "llvm/Target/TargetMachine.h" 22 #include "llvm/Target/TargetRegisterInfo.h" 23 24 namespace llvm { 25 26 /// ARMFunctionInfo - This class is derived from MachineFunctionInfo and 27 /// contains private ARM-specific information for each MachineFunction. 28 class ARMFunctionInfo : public MachineFunctionInfo { 29 virtual void anchor(); 30 31 /// isThumb - True if this function is compiled under Thumb mode. 32 /// Used to initialized Align, so must precede it. 33 bool isThumb; 34 35 /// hasThumb2 - True if the target architecture supports Thumb2. Do not use 36 /// to determine if function is compiled under Thumb mode, for that use 37 /// 'isThumb'. 38 bool hasThumb2; 39 40 /// StByValParamsPadding - For parameter that is split between 41 /// GPRs and memory; while recovering GPRs part, when 42 /// StackAlignment > 4, and GPRs-part-size mod StackAlignment != 0, 43 /// we need to insert gap before parameter start address. It allows to 44 /// "attach" GPR-part to the part that was passed via stack. 45 unsigned StByValParamsPadding; 46 47 /// VarArgsRegSaveSize - Size of the register save area for vararg functions. 48 /// 49 unsigned ArgRegsSaveSize; 50 51 /// ReturnRegsCount - Number of registers used up in the return. 52 unsigned ReturnRegsCount; 53 54 /// HasStackFrame - True if this function has a stack frame. Set by 55 /// processFunctionBeforeCalleeSavedScan(). 56 bool HasStackFrame; 57 58 /// RestoreSPFromFP - True if epilogue should restore SP from FP. Set by 59 /// emitPrologue. 60 bool RestoreSPFromFP; 61 62 /// LRSpilledForFarJump - True if the LR register has been for spilled to 63 /// enable far jump. 64 bool LRSpilledForFarJump; 65 66 /// FramePtrSpillOffset - If HasStackFrame, this records the frame pointer 67 /// spill stack offset. 68 unsigned FramePtrSpillOffset; 69 70 /// GPRCS1Offset, GPRCS2Offset, DPRCSOffset - Starting offset of callee saved 71 /// register spills areas. For Mac OS X: 72 /// 73 /// GPR callee-saved (1) : r4, r5, r6, r7, lr 74 /// -------------------------------------------- 75 /// GPR callee-saved (2) : r8, r10, r11 76 /// -------------------------------------------- 77 /// DPR callee-saved : d8 - d15 78 /// 79 /// Also see AlignedDPRCSRegs below. Not all D-regs need to go in area 3. 80 /// Some may be spilled after the stack has been realigned. 81 unsigned GPRCS1Offset; 82 unsigned GPRCS2Offset; 83 unsigned DPRCSOffset; 84 85 /// GPRCS1Size, GPRCS2Size, DPRCSSize - Sizes of callee saved register spills 86 /// areas. 87 unsigned GPRCS1Size; 88 unsigned GPRCS2Size; 89 unsigned DPRCSAlignGapSize; 90 unsigned DPRCSSize; 91 92 /// NumAlignedDPRCS2Regs - The number of callee-saved DPRs that are saved in 93 /// the aligned portion of the stack frame. This is always a contiguous 94 /// sequence of D-registers starting from d8. 95 /// 96 /// We do not keep track of the frame indices used for these registers - they 97 /// behave like any other frame index in the aligned stack frame. These 98 /// registers also aren't included in DPRCSSize above. 99 unsigned NumAlignedDPRCS2Regs; 100 101 unsigned PICLabelUId; 102 103 /// VarArgsFrameIndex - FrameIndex for start of varargs area. 104 int VarArgsFrameIndex; 105 106 /// HasITBlocks - True if IT blocks have been inserted. 107 bool HasITBlocks; 108 109 /// CPEClones - Track constant pool entries clones created by Constant Island 110 /// pass. 111 DenseMap<unsigned, unsigned> CPEClones; 112 113 /// GlobalBaseReg - keeps track of the virtual register initialized for 114 /// use as the global base register. This is used for PIC in some PIC 115 /// relocation models. 116 unsigned GlobalBaseReg; 117 118 /// ArgumentStackSize - amount of bytes on stack consumed by the arguments 119 /// being passed on the stack 120 unsigned ArgumentStackSize; 121 122 /// CoalescedWeights - mapping of basic blocks to the rolling counter of 123 /// coalesced weights. 124 DenseMap<const MachineBasicBlock*, unsigned> CoalescedWeights; 125 126 public: ARMFunctionInfo()127 ARMFunctionInfo() : 128 isThumb(false), 129 hasThumb2(false), 130 ArgRegsSaveSize(0), ReturnRegsCount(0), HasStackFrame(false), 131 RestoreSPFromFP(false), 132 LRSpilledForFarJump(false), 133 FramePtrSpillOffset(0), GPRCS1Offset(0), GPRCS2Offset(0), DPRCSOffset(0), 134 GPRCS1Size(0), GPRCS2Size(0), DPRCSAlignGapSize(0), DPRCSSize(0), 135 NumAlignedDPRCS2Regs(0), PICLabelUId(0), 136 VarArgsFrameIndex(0), HasITBlocks(false), GlobalBaseReg(0) {} 137 138 explicit ARMFunctionInfo(MachineFunction &MF); 139 isThumbFunction()140 bool isThumbFunction() const { return isThumb; } isThumb1OnlyFunction()141 bool isThumb1OnlyFunction() const { return isThumb && !hasThumb2; } isThumb2Function()142 bool isThumb2Function() const { return isThumb && hasThumb2; } 143 getStoredByValParamsPadding()144 unsigned getStoredByValParamsPadding() const { return StByValParamsPadding; } setStoredByValParamsPadding(unsigned p)145 void setStoredByValParamsPadding(unsigned p) { StByValParamsPadding = p; } 146 getArgRegsSaveSize()147 unsigned getArgRegsSaveSize() const { return ArgRegsSaveSize; } setArgRegsSaveSize(unsigned s)148 void setArgRegsSaveSize(unsigned s) { ArgRegsSaveSize = s; } 149 getReturnRegsCount()150 unsigned getReturnRegsCount() const { return ReturnRegsCount; } setReturnRegsCount(unsigned s)151 void setReturnRegsCount(unsigned s) { ReturnRegsCount = s; } 152 hasStackFrame()153 bool hasStackFrame() const { return HasStackFrame; } setHasStackFrame(bool s)154 void setHasStackFrame(bool s) { HasStackFrame = s; } 155 shouldRestoreSPFromFP()156 bool shouldRestoreSPFromFP() const { return RestoreSPFromFP; } setShouldRestoreSPFromFP(bool s)157 void setShouldRestoreSPFromFP(bool s) { RestoreSPFromFP = s; } 158 isLRSpilledForFarJump()159 bool isLRSpilledForFarJump() const { return LRSpilledForFarJump; } setLRIsSpilledForFarJump(bool s)160 void setLRIsSpilledForFarJump(bool s) { LRSpilledForFarJump = s; } 161 getFramePtrSpillOffset()162 unsigned getFramePtrSpillOffset() const { return FramePtrSpillOffset; } setFramePtrSpillOffset(unsigned o)163 void setFramePtrSpillOffset(unsigned o) { FramePtrSpillOffset = o; } 164 getNumAlignedDPRCS2Regs()165 unsigned getNumAlignedDPRCS2Regs() const { return NumAlignedDPRCS2Regs; } setNumAlignedDPRCS2Regs(unsigned n)166 void setNumAlignedDPRCS2Regs(unsigned n) { NumAlignedDPRCS2Regs = n; } 167 getGPRCalleeSavedArea1Offset()168 unsigned getGPRCalleeSavedArea1Offset() const { return GPRCS1Offset; } getGPRCalleeSavedArea2Offset()169 unsigned getGPRCalleeSavedArea2Offset() const { return GPRCS2Offset; } getDPRCalleeSavedAreaOffset()170 unsigned getDPRCalleeSavedAreaOffset() const { return DPRCSOffset; } 171 setGPRCalleeSavedArea1Offset(unsigned o)172 void setGPRCalleeSavedArea1Offset(unsigned o) { GPRCS1Offset = o; } setGPRCalleeSavedArea2Offset(unsigned o)173 void setGPRCalleeSavedArea2Offset(unsigned o) { GPRCS2Offset = o; } setDPRCalleeSavedAreaOffset(unsigned o)174 void setDPRCalleeSavedAreaOffset(unsigned o) { DPRCSOffset = o; } 175 getGPRCalleeSavedArea1Size()176 unsigned getGPRCalleeSavedArea1Size() const { return GPRCS1Size; } getGPRCalleeSavedArea2Size()177 unsigned getGPRCalleeSavedArea2Size() const { return GPRCS2Size; } getDPRCalleeSavedGapSize()178 unsigned getDPRCalleeSavedGapSize() const { return DPRCSAlignGapSize; } getDPRCalleeSavedAreaSize()179 unsigned getDPRCalleeSavedAreaSize() const { return DPRCSSize; } 180 setGPRCalleeSavedArea1Size(unsigned s)181 void setGPRCalleeSavedArea1Size(unsigned s) { GPRCS1Size = s; } setGPRCalleeSavedArea2Size(unsigned s)182 void setGPRCalleeSavedArea2Size(unsigned s) { GPRCS2Size = s; } setDPRCalleeSavedGapSize(unsigned s)183 void setDPRCalleeSavedGapSize(unsigned s) { DPRCSAlignGapSize = s; } setDPRCalleeSavedAreaSize(unsigned s)184 void setDPRCalleeSavedAreaSize(unsigned s) { DPRCSSize = s; } 185 getArgumentStackSize()186 unsigned getArgumentStackSize() const { return ArgumentStackSize; } setArgumentStackSize(unsigned size)187 void setArgumentStackSize(unsigned size) { ArgumentStackSize = size; } 188 initPICLabelUId(unsigned UId)189 void initPICLabelUId(unsigned UId) { 190 PICLabelUId = UId; 191 } 192 getNumPICLabels()193 unsigned getNumPICLabels() const { 194 return PICLabelUId; 195 } 196 createPICLabelUId()197 unsigned createPICLabelUId() { 198 return PICLabelUId++; 199 } 200 getVarArgsFrameIndex()201 int getVarArgsFrameIndex() const { return VarArgsFrameIndex; } setVarArgsFrameIndex(int Index)202 void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; } 203 hasITBlocks()204 bool hasITBlocks() const { return HasITBlocks; } setHasITBlocks(bool h)205 void setHasITBlocks(bool h) { HasITBlocks = h; } 206 getGlobalBaseReg()207 unsigned getGlobalBaseReg() const { return GlobalBaseReg; } setGlobalBaseReg(unsigned Reg)208 void setGlobalBaseReg(unsigned Reg) { GlobalBaseReg = Reg; } 209 recordCPEClone(unsigned CPIdx,unsigned CPCloneIdx)210 void recordCPEClone(unsigned CPIdx, unsigned CPCloneIdx) { 211 if (!CPEClones.insert(std::make_pair(CPCloneIdx, CPIdx)).second) 212 llvm_unreachable("Duplicate entries!"); 213 } 214 getOriginalCPIdx(unsigned CloneIdx)215 unsigned getOriginalCPIdx(unsigned CloneIdx) const { 216 DenseMap<unsigned, unsigned>::const_iterator I = CPEClones.find(CloneIdx); 217 if (I != CPEClones.end()) 218 return I->second; 219 else 220 return -1U; 221 } 222 getCoalescedWeight(MachineBasicBlock * MBB)223 DenseMap<const MachineBasicBlock*, unsigned>::iterator getCoalescedWeight( 224 MachineBasicBlock* MBB) { 225 auto It = CoalescedWeights.find(MBB); 226 if (It == CoalescedWeights.end()) { 227 It = CoalescedWeights.insert(std::make_pair(MBB, 0)).first; 228 } 229 return It; 230 } 231 }; 232 } // End llvm namespace 233 234 #endif 235