ARMMachineFunctionInfo.h revision 263508
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 23namespace llvm { 24 25/// ARMFunctionInfo - This class is derived from MachineFunctionInfo and 26/// contains private ARM-specific information for each MachineFunction. 27class 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 == 8, and GPRs-part-size mod 8 != 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 117public: 118 ARMFunctionInfo() : 119 isThumb(false), 120 hasThumb2(false), 121 ArgRegsSaveSize(0), HasStackFrame(false), RestoreSPFromFP(false), 122 LRSpilledForFarJump(false), 123 FramePtrSpillOffset(0), GPRCS1Offset(0), GPRCS2Offset(0), DPRCSOffset(0), 124 GPRCS1Size(0), GPRCS2Size(0), DPRCSSize(0), 125 NumAlignedDPRCS2Regs(0), 126 JumpTableUId(0), PICLabelUId(0), 127 VarArgsFrameIndex(0), HasITBlocks(false), GlobalBaseReg(0) {} 128 129 explicit ARMFunctionInfo(MachineFunction &MF) : 130 isThumb(MF.getTarget().getSubtarget<ARMSubtarget>().isThumb()), 131 hasThumb2(MF.getTarget().getSubtarget<ARMSubtarget>().hasThumb2()), 132 StByValParamsPadding(0), 133 ArgRegsSaveSize(0), HasStackFrame(false), RestoreSPFromFP(false), 134 LRSpilledForFarJump(false), 135 FramePtrSpillOffset(0), GPRCS1Offset(0), GPRCS2Offset(0), DPRCSOffset(0), 136 GPRCS1Size(0), GPRCS2Size(0), DPRCSSize(0), 137 JumpTableUId(0), PICLabelUId(0), 138 VarArgsFrameIndex(0), HasITBlocks(false), GlobalBaseReg(0) {} 139 140 bool isThumbFunction() const { return isThumb; } 141 bool isThumb1OnlyFunction() const { return isThumb && !hasThumb2; } 142 bool isThumb2Function() const { return isThumb && hasThumb2; } 143 144 unsigned getStoredByValParamsPadding() const { return StByValParamsPadding; } 145 void setStoredByValParamsPadding(unsigned p) { StByValParamsPadding = p; } 146 147 unsigned getArgRegsSaveSize(unsigned Align = 0) const { 148 if (!Align) 149 return ArgRegsSaveSize; 150 return (ArgRegsSaveSize + Align - 1) & ~(Align - 1); 151 } 152 void setArgRegsSaveSize(unsigned s) { ArgRegsSaveSize = s; } 153 154 bool hasStackFrame() const { return HasStackFrame; } 155 void setHasStackFrame(bool s) { HasStackFrame = s; } 156 157 bool shouldRestoreSPFromFP() const { return RestoreSPFromFP; } 158 void setShouldRestoreSPFromFP(bool s) { RestoreSPFromFP = s; } 159 160 bool isLRSpilledForFarJump() const { return LRSpilledForFarJump; } 161 void setLRIsSpilledForFarJump(bool s) { LRSpilledForFarJump = s; } 162 163 unsigned getFramePtrSpillOffset() const { return FramePtrSpillOffset; } 164 void setFramePtrSpillOffset(unsigned o) { FramePtrSpillOffset = o; } 165 166 unsigned getNumAlignedDPRCS2Regs() const { return NumAlignedDPRCS2Regs; } 167 void setNumAlignedDPRCS2Regs(unsigned n) { NumAlignedDPRCS2Regs = n; } 168 169 unsigned getGPRCalleeSavedArea1Offset() const { return GPRCS1Offset; } 170 unsigned getGPRCalleeSavedArea2Offset() const { return GPRCS2Offset; } 171 unsigned getDPRCalleeSavedAreaOffset() const { return DPRCSOffset; } 172 173 void setGPRCalleeSavedArea1Offset(unsigned o) { GPRCS1Offset = o; } 174 void setGPRCalleeSavedArea2Offset(unsigned o) { GPRCS2Offset = o; } 175 void setDPRCalleeSavedAreaOffset(unsigned o) { DPRCSOffset = o; } 176 177 unsigned getGPRCalleeSavedArea1Size() const { return GPRCS1Size; } 178 unsigned getGPRCalleeSavedArea2Size() const { return GPRCS2Size; } 179 unsigned getDPRCalleeSavedAreaSize() const { return DPRCSSize; } 180 181 void setGPRCalleeSavedArea1Size(unsigned s) { GPRCS1Size = s; } 182 void setGPRCalleeSavedArea2Size(unsigned s) { GPRCS2Size = s; } 183 void setDPRCalleeSavedAreaSize(unsigned s) { DPRCSSize = s; } 184 185 unsigned createJumpTableUId() { 186 return JumpTableUId++; 187 } 188 189 unsigned getNumJumpTables() const { 190 return JumpTableUId; 191 } 192 193 void initPICLabelUId(unsigned UId) { 194 PICLabelUId = UId; 195 } 196 197 unsigned getNumPICLabels() const { 198 return PICLabelUId; 199 } 200 201 unsigned createPICLabelUId() { 202 return PICLabelUId++; 203 } 204 205 int getVarArgsFrameIndex() const { return VarArgsFrameIndex; } 206 void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; } 207 208 bool hasITBlocks() const { return HasITBlocks; } 209 void setHasITBlocks(bool h) { HasITBlocks = h; } 210 211 unsigned getGlobalBaseReg() const { return GlobalBaseReg; } 212 void setGlobalBaseReg(unsigned Reg) { GlobalBaseReg = Reg; } 213 214 void recordCPEClone(unsigned CPIdx, unsigned CPCloneIdx) { 215 if (!CPEClones.insert(std::make_pair(CPCloneIdx, CPIdx)).second) 216 assert(0 && "Duplicate entries!"); 217 } 218 219 unsigned getOriginalCPIdx(unsigned CloneIdx) const { 220 DenseMap<unsigned, unsigned>::const_iterator I = CPEClones.find(CloneIdx); 221 if (I != CPEClones.end()) 222 return I->second; 223 else 224 return -1U; 225 } 226}; 227} // End llvm namespace 228 229#endif // ARMMACHINEFUNCTIONINFO_H 230