1 //===-- ARMMachineFunctionInfo.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 /// determineCalleeSaves(). 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 /// ArgumentStackSize - amount of bytes on stack consumed by the arguments 114 /// being passed on the stack 115 unsigned ArgumentStackSize; 116 117 /// CoalescedWeights - mapping of basic blocks to the rolling counter of 118 /// coalesced weights. 119 DenseMap<const MachineBasicBlock*, unsigned> CoalescedWeights; 120 121 public: 122 ARMFunctionInfo() : 123 isThumb(false), 124 hasThumb2(false), 125 ArgRegsSaveSize(0), ReturnRegsCount(0), HasStackFrame(false), 126 RestoreSPFromFP(false), 127 LRSpilledForFarJump(false), 128 FramePtrSpillOffset(0), GPRCS1Offset(0), GPRCS2Offset(0), DPRCSOffset(0), 129 GPRCS1Size(0), GPRCS2Size(0), DPRCSAlignGapSize(0), DPRCSSize(0), 130 NumAlignedDPRCS2Regs(0), PICLabelUId(0), 131 VarArgsFrameIndex(0), HasITBlocks(false) {} 132 133 explicit ARMFunctionInfo(MachineFunction &MF); 134 135 bool isThumbFunction() const { return isThumb; } 136 bool isThumb1OnlyFunction() const { return isThumb && !hasThumb2; } 137 bool isThumb2Function() const { return isThumb && hasThumb2; } 138 139 unsigned getStoredByValParamsPadding() const { return StByValParamsPadding; } 140 void setStoredByValParamsPadding(unsigned p) { StByValParamsPadding = p; } 141 142 unsigned getArgRegsSaveSize() const { return ArgRegsSaveSize; } 143 void setArgRegsSaveSize(unsigned s) { ArgRegsSaveSize = s; } 144 145 unsigned getReturnRegsCount() const { return ReturnRegsCount; } 146 void setReturnRegsCount(unsigned s) { ReturnRegsCount = s; } 147 148 bool hasStackFrame() const { return HasStackFrame; } 149 void setHasStackFrame(bool s) { HasStackFrame = s; } 150 151 bool shouldRestoreSPFromFP() const { return RestoreSPFromFP; } 152 void setShouldRestoreSPFromFP(bool s) { RestoreSPFromFP = s; } 153 154 bool isLRSpilledForFarJump() const { return LRSpilledForFarJump; } 155 void setLRIsSpilledForFarJump(bool s) { LRSpilledForFarJump = s; } 156 157 unsigned getFramePtrSpillOffset() const { return FramePtrSpillOffset; } 158 void setFramePtrSpillOffset(unsigned o) { FramePtrSpillOffset = o; } 159 160 unsigned getNumAlignedDPRCS2Regs() const { return NumAlignedDPRCS2Regs; } 161 void setNumAlignedDPRCS2Regs(unsigned n) { NumAlignedDPRCS2Regs = n; } 162 163 unsigned getGPRCalleeSavedArea1Offset() const { return GPRCS1Offset; } 164 unsigned getGPRCalleeSavedArea2Offset() const { return GPRCS2Offset; } 165 unsigned getDPRCalleeSavedAreaOffset() const { return DPRCSOffset; } 166 167 void setGPRCalleeSavedArea1Offset(unsigned o) { GPRCS1Offset = o; } 168 void setGPRCalleeSavedArea2Offset(unsigned o) { GPRCS2Offset = o; } 169 void setDPRCalleeSavedAreaOffset(unsigned o) { DPRCSOffset = o; } 170 171 unsigned getGPRCalleeSavedArea1Size() const { return GPRCS1Size; } 172 unsigned getGPRCalleeSavedArea2Size() const { return GPRCS2Size; } 173 unsigned getDPRCalleeSavedGapSize() const { return DPRCSAlignGapSize; } 174 unsigned getDPRCalleeSavedAreaSize() const { return DPRCSSize; } 175 176 void setGPRCalleeSavedArea1Size(unsigned s) { GPRCS1Size = s; } 177 void setGPRCalleeSavedArea2Size(unsigned s) { GPRCS2Size = s; } 178 void setDPRCalleeSavedGapSize(unsigned s) { DPRCSAlignGapSize = s; } 179 void setDPRCalleeSavedAreaSize(unsigned s) { DPRCSSize = s; } 180 181 unsigned getArgumentStackSize() const { return ArgumentStackSize; } 182 void setArgumentStackSize(unsigned size) { ArgumentStackSize = size; } 183 184 void initPICLabelUId(unsigned UId) { 185 PICLabelUId = UId; 186 } 187 188 unsigned getNumPICLabels() const { 189 return PICLabelUId; 190 } 191 192 unsigned createPICLabelUId() { 193 return PICLabelUId++; 194 } 195 196 int getVarArgsFrameIndex() const { return VarArgsFrameIndex; } 197 void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; } 198 199 bool hasITBlocks() const { return HasITBlocks; } 200 void setHasITBlocks(bool h) { HasITBlocks = h; } 201 202 void recordCPEClone(unsigned CPIdx, unsigned CPCloneIdx) { 203 if (!CPEClones.insert(std::make_pair(CPCloneIdx, CPIdx)).second) 204 llvm_unreachable("Duplicate entries!"); 205 } 206 207 unsigned getOriginalCPIdx(unsigned CloneIdx) const { 208 DenseMap<unsigned, unsigned>::const_iterator I = CPEClones.find(CloneIdx); 209 if (I != CPEClones.end()) 210 return I->second; 211 else 212 return -1U; 213 } 214 215 DenseMap<const MachineBasicBlock*, unsigned>::iterator getCoalescedWeight( 216 MachineBasicBlock* MBB) { 217 auto It = CoalescedWeights.find(MBB); 218 if (It == CoalescedWeights.end()) { 219 It = CoalescedWeights.insert(std::make_pair(MBB, 0)).first; 220 } 221 return It; 222 } 223 }; 224 } // End llvm namespace 225 226 #endif 227
