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 "llvm/ADT/DenseMap.h" 18 #include "llvm/ADT/SmallPtrSet.h" 19 #include "llvm/CodeGen/MachineFunction.h" 20 #include "llvm/Support/ErrorHandling.h" 21 #include <utility> 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 = false; 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 = false; 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 = 0; 45 46 /// VarArgsRegSaveSize - Size of the register save area for vararg functions. 47 /// 48 unsigned ArgRegsSaveSize = 0; 49 50 /// ReturnRegsCount - Number of registers used up in the return. 51 unsigned ReturnRegsCount = 0; 52 53 /// HasStackFrame - True if this function has a stack frame. Set by 54 /// determineCalleeSaves(). 55 bool HasStackFrame = false; 56 57 /// RestoreSPFromFP - True if epilogue should restore SP from FP. Set by 58 /// emitPrologue. 59 bool RestoreSPFromFP = false; 60 61 /// LRSpilledForFarJump - True if the LR register has been for spilled to 62 /// enable far jump. 63 bool LRSpilledForFarJump = false; 64 65 /// FramePtrSpillOffset - If HasStackFrame, this records the frame pointer 66 /// spill stack offset. 67 unsigned FramePtrSpillOffset = 0; 68 69 /// GPRCS1Offset, GPRCS2Offset, DPRCSOffset - Starting offset of callee saved 70 /// register spills areas. For Mac OS X: 71 /// 72 /// GPR callee-saved (1) : r4, r5, r6, r7, lr 73 /// -------------------------------------------- 74 /// GPR callee-saved (2) : r8, r10, r11 75 /// -------------------------------------------- 76 /// DPR callee-saved : d8 - d15 77 /// 78 /// Also see AlignedDPRCSRegs below. Not all D-regs need to go in area 3. 79 /// Some may be spilled after the stack has been realigned. 80 unsigned GPRCS1Offset = 0; 81 unsigned GPRCS2Offset = 0; 82 unsigned DPRCSOffset = 0; 83 84 /// GPRCS1Size, GPRCS2Size, DPRCSSize - Sizes of callee saved register spills 85 /// areas. 86 unsigned GPRCS1Size = 0; 87 unsigned GPRCS2Size = 0; 88 unsigned DPRCSAlignGapSize = 0; 89 unsigned DPRCSSize = 0; 90 91 /// NumAlignedDPRCS2Regs - The number of callee-saved DPRs that are saved in 92 /// the aligned portion of the stack frame. This is always a contiguous 93 /// sequence of D-registers starting from d8. 94 /// 95 /// We do not keep track of the frame indices used for these registers - they 96 /// behave like any other frame index in the aligned stack frame. These 97 /// registers also aren't included in DPRCSSize above. 98 unsigned NumAlignedDPRCS2Regs = 0; 99 100 unsigned PICLabelUId = 0; 101 102 /// VarArgsFrameIndex - FrameIndex for start of varargs area. 103 int VarArgsFrameIndex = 0; 104 105 /// HasITBlocks - True if IT blocks have been inserted. 106 bool HasITBlocks = false; 107 108 /// CPEClones - Track constant pool entries clones created by Constant Island 109 /// pass. 110 DenseMap<unsigned, unsigned> CPEClones; 111 112 /// ArgumentStackSize - amount of bytes on stack consumed by the arguments 113 /// being passed on the stack 114 unsigned ArgumentStackSize = 0; 115 116 /// CoalescedWeights - mapping of basic blocks to the rolling counter of 117 /// coalesced weights. 118 DenseMap<const MachineBasicBlock*, unsigned> CoalescedWeights; 119 120 /// True if this function has a subset of CSRs that is handled explicitly via 121 /// copies. 122 bool IsSplitCSR = false; 123 124 /// Globals that have had their storage promoted into the constant pool. 125 SmallPtrSet<const GlobalVariable*,2> PromotedGlobals; 126 127 /// The amount the literal pool has been increasedby due to promoted globals. 128 int PromotedGlobalsIncrease = 0; 129 130 public: 131 ARMFunctionInfo() = default; 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 bool isSplitCSR() const { return IsSplitCSR; } 203 void setIsSplitCSR(bool s) { IsSplitCSR = s; } 204 205 void recordCPEClone(unsigned CPIdx, unsigned CPCloneIdx) { 206 if (!CPEClones.insert(std::make_pair(CPCloneIdx, CPIdx)).second) 207 llvm_unreachable("Duplicate entries!"); 208 } 209 210 unsigned getOriginalCPIdx(unsigned CloneIdx) const { 211 DenseMap<unsigned, unsigned>::const_iterator I = CPEClones.find(CloneIdx); 212 if (I != CPEClones.end()) 213 return I->second; 214 else 215 return -1U; 216 } 217 218 DenseMap<const MachineBasicBlock*, unsigned>::iterator getCoalescedWeight( 219 MachineBasicBlock* MBB) { 220 auto It = CoalescedWeights.find(MBB); 221 if (It == CoalescedWeights.end()) { 222 It = CoalescedWeights.insert(std::make_pair(MBB, 0)).first; 223 } 224 return It; 225 } 226 227 /// Indicate to the backend that \c GV has had its storage changed to inside 228 /// a constant pool. This means it no longer needs to be emitted as a 229 /// global variable. 230 void markGlobalAsPromotedToConstantPool(const GlobalVariable *GV) { 231 PromotedGlobals.insert(GV); 232 } 233 SmallPtrSet<const GlobalVariable*, 2>& getGlobalsPromotedToConstantPool() { 234 return PromotedGlobals; 235 } 236 int getPromotedConstpoolIncrease() const { 237 return PromotedGlobalsIncrease; 238 } 239 void setPromotedConstpoolIncrease(int Sz) { 240 PromotedGlobalsIncrease = Sz; 241 } 242 }; 243 244 } // end namespace llvm 245 246 #endif // LLVM_LIB_TARGET_ARM_ARMMACHINEFUNCTIONINFO_H 247
