1 //====- ARMMachineFuctionInfo.h - ARM machine function info -----*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file declares ARM-specific per-machine-function information.
12 //===----------------------------------------------------------------------===//
14 #ifndef ARMMACHINEFUNCTIONINFO_H
15 #define ARMMACHINEFUNCTIONINFO_H
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"
25 /// ARMFunctionInfo - This class is derived from MachineFunctionInfo and
26 /// contains private ARM-specific information for each MachineFunction.
27 class ARMFunctionInfo : public MachineFunctionInfo {
29 /// isThumb - True if this function is compiled under Thumb mode.
30 /// Used to initialized Align, so must precede it.
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
38 /// VarArgsRegSaveSize - Size of the register save area for vararg functions.
40 unsigned VarArgsRegSaveSize;
42 /// HasStackFrame - True if this function has a stack frame. Set by
43 /// processFunctionBeforeCalleeSavedScan().
46 /// RestoreSPFromFP - True if epilogue should restore SP from FP. Set by
50 /// LRSpilledForFarJump - True if the LR register has been for spilled to
52 bool LRSpilledForFarJump;
54 /// FramePtrSpillOffset - If HasStackFrame, this records the frame pointer
55 /// spill stack offset.
56 unsigned FramePtrSpillOffset;
58 /// GPRCS1Offset, GPRCS2Offset, DPRCSOffset - Starting offset of callee saved
59 /// register spills areas. For Mac OS X:
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;
70 /// GPRCS1Size, GPRCS2Size, DPRCSSize - Sizes of callee saved register spills
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;
82 /// SpilledCSRegs - A BitVector mask of all spilled callee-saved registers.
84 BitVector SpilledCSRegs;
86 /// JumpTableUId - Unique id for jumptables.
88 unsigned JumpTableUId;
92 /// VarArgsFrameIndex - FrameIndex for start of varargs area.
93 int VarArgsFrameIndex;
95 /// HasITBlocks - True if IT blocks have been inserted.
98 /// CPEClones - Track constant pool entries clones created by Constant Island
100 DenseMap<unsigned, unsigned> CPEClones;
106 VarArgsRegSaveSize(0), HasStackFrame(false), RestoreSPFromFP(false),
107 LRSpilledForFarJump(false),
108 FramePtrSpillOffset(0), GPRCS1Offset(0), GPRCS2Offset(0), DPRCSOffset(0),
109 GPRCS1Size(0), GPRCS2Size(0), DPRCSSize(0),
110 GPRCS1Frames(0), GPRCS2Frames(0), DPRCSFrames(0),
111 JumpTableUId(0), PICLabelUId(0),
112 VarArgsFrameIndex(0), HasITBlocks(false) {}
114 explicit ARMFunctionInfo(MachineFunction &MF) :
115 isThumb(MF.getTarget().getSubtarget<ARMSubtarget>().isThumb()),
116 hasThumb2(MF.getTarget().getSubtarget<ARMSubtarget>().hasThumb2()),
117 VarArgsRegSaveSize(0), HasStackFrame(false), RestoreSPFromFP(false),
118 LRSpilledForFarJump(false),
119 FramePtrSpillOffset(0), GPRCS1Offset(0), GPRCS2Offset(0), DPRCSOffset(0),
120 GPRCS1Size(0), GPRCS2Size(0), DPRCSSize(0),
121 GPRCS1Frames(32), GPRCS2Frames(32), DPRCSFrames(32),
122 SpilledCSRegs(MF.getTarget().getRegisterInfo()->getNumRegs()),
123 JumpTableUId(0), PICLabelUId(0),
124 VarArgsFrameIndex(0), HasITBlocks(false) {}
126 bool isThumbFunction() const { return isThumb; }
127 bool isThumb1OnlyFunction() const { return isThumb && !hasThumb2; }
128 bool isThumb2Function() const { return isThumb && hasThumb2; }
130 unsigned getVarArgsRegSaveSize() const { return VarArgsRegSaveSize; }
131 void setVarArgsRegSaveSize(unsigned s) { VarArgsRegSaveSize = s; }
133 bool hasStackFrame() const { return HasStackFrame; }
134 void setHasStackFrame(bool s) { HasStackFrame = s; }
136 bool shouldRestoreSPFromFP() const { return RestoreSPFromFP; }
137 void setShouldRestoreSPFromFP(bool s) { RestoreSPFromFP = s; }
139 bool isLRSpilledForFarJump() const { return LRSpilledForFarJump; }
140 void setLRIsSpilledForFarJump(bool s) { LRSpilledForFarJump = s; }
142 unsigned getFramePtrSpillOffset() const { return FramePtrSpillOffset; }
143 void setFramePtrSpillOffset(unsigned o) { FramePtrSpillOffset = o; }
145 unsigned getGPRCalleeSavedArea1Offset() const { return GPRCS1Offset; }
146 unsigned getGPRCalleeSavedArea2Offset() const { return GPRCS2Offset; }
147 unsigned getDPRCalleeSavedAreaOffset() const { return DPRCSOffset; }
149 void setGPRCalleeSavedArea1Offset(unsigned o) { GPRCS1Offset = o; }
150 void setGPRCalleeSavedArea2Offset(unsigned o) { GPRCS2Offset = o; }
151 void setDPRCalleeSavedAreaOffset(unsigned o) { DPRCSOffset = o; }
153 unsigned getGPRCalleeSavedArea1Size() const { return GPRCS1Size; }
154 unsigned getGPRCalleeSavedArea2Size() const { return GPRCS2Size; }
155 unsigned getDPRCalleeSavedAreaSize() const { return DPRCSSize; }
157 void setGPRCalleeSavedArea1Size(unsigned s) { GPRCS1Size = s; }
158 void setGPRCalleeSavedArea2Size(unsigned s) { GPRCS2Size = s; }
159 void setDPRCalleeSavedAreaSize(unsigned s) { DPRCSSize = s; }
161 bool isGPRCalleeSavedArea1Frame(int fi) const {
162 if (fi < 0 || fi >= (int)GPRCS1Frames.size())
164 return GPRCS1Frames[fi];
166 bool isGPRCalleeSavedArea2Frame(int fi) const {
167 if (fi < 0 || fi >= (int)GPRCS2Frames.size())
169 return GPRCS2Frames[fi];
171 bool isDPRCalleeSavedAreaFrame(int fi) const {
172 if (fi < 0 || fi >= (int)DPRCSFrames.size())
174 return DPRCSFrames[fi];
177 void addGPRCalleeSavedArea1Frame(int fi) {
179 int Size = GPRCS1Frames.size();
184 GPRCS1Frames.resize(Size);
186 GPRCS1Frames[fi] = true;
189 void addGPRCalleeSavedArea2Frame(int fi) {
191 int Size = GPRCS2Frames.size();
196 GPRCS2Frames.resize(Size);
198 GPRCS2Frames[fi] = true;
201 void addDPRCalleeSavedAreaFrame(int fi) {
203 int Size = DPRCSFrames.size();
208 DPRCSFrames.resize(Size);
210 DPRCSFrames[fi] = true;
214 void setCSRegisterIsSpilled(unsigned Reg) {
215 SpilledCSRegs.set(Reg);
218 bool isCSRegisterSpilled(unsigned Reg) const {
219 return SpilledCSRegs[Reg];
222 const BitVector &getSpilledCSRegisters() const {
223 return SpilledCSRegs;
226 unsigned createJumpTableUId() {
227 return JumpTableUId++;
230 unsigned getNumJumpTables() const {
234 void initPICLabelUId(unsigned UId) {
238 unsigned getNumPICLabels() const {
242 unsigned createPICLabelUId() {
243 return PICLabelUId++;
246 int getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
247 void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; }
249 bool hasITBlocks() const { return HasITBlocks; }
250 void setHasITBlocks(bool h) { HasITBlocks = h; }
252 void recordCPEClone(unsigned CPIdx, unsigned CPCloneIdx) {
253 if (!CPEClones.insert(std::make_pair(CPCloneIdx, CPIdx)).second)
254 assert(0 && "Duplicate entries!");
257 unsigned getOriginalCPIdx(unsigned CloneIdx) const {
258 DenseMap<unsigned, unsigned>::const_iterator I = CPEClones.find(CloneIdx);
259 if (I != CPEClones.end())
265 } // End llvm namespace
267 #endif // ARMMACHINEFUNCTIONINFO_H