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/ADT/BitVector.h"
19 #include "llvm/CodeGen/MachineFunction.h"
20 #include "llvm/Target/TargetMachine.h"
21 #include "llvm/Target/TargetRegisterInfo.h"
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();
30 /// isThumb - True if this function is compiled under Thumb mode.
31 /// Used to initialized Align, so must precede it.
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
39 /// VarArgsRegSaveSize - Size of the register save area for vararg functions.
41 unsigned VarArgsRegSaveSize;
43 /// HasStackFrame - True if this function has a stack frame. Set by
44 /// processFunctionBeforeCalleeSavedScan().
47 /// RestoreSPFromFP - True if epilogue should restore SP from FP. Set by
51 /// LRSpilledForFarJump - True if the LR register has been for spilled to
53 bool LRSpilledForFarJump;
55 /// FramePtrSpillOffset - If HasStackFrame, this records the frame pointer
56 /// spill stack offset.
57 unsigned FramePtrSpillOffset;
59 /// GPRCS1Offset, GPRCS2Offset, DPRCSOffset - Starting offset of callee saved
60 /// register spills areas. For Mac OS X:
62 /// GPR callee-saved (1) : r4, r5, r6, r7, lr
63 /// --------------------------------------------
64 /// GPR callee-saved (2) : r8, r10, r11
65 /// --------------------------------------------
66 /// DPR callee-saved : d8 - d15
68 /// Also see AlignedDPRCSRegs below. Not all D-regs need to go in area 3.
69 /// Some may be spilled after the stack has been realigned.
70 unsigned GPRCS1Offset;
71 unsigned GPRCS2Offset;
74 /// GPRCS1Size, GPRCS2Size, DPRCSSize - Sizes of callee saved register spills
80 /// GPRCS1Frames, GPRCS2Frames, DPRCSFrames - Keeps track of frame indices
81 /// which belong to these spill areas.
82 BitVector GPRCS1Frames;
83 BitVector GPRCS2Frames;
84 BitVector DPRCSFrames;
86 /// NumAlignedDPRCS2Regs - The number of callee-saved DPRs that are saved in
87 /// the aligned portion of the stack frame. This is always a contiguous
88 /// sequence of D-registers starting from d8.
90 /// We do not keep track of the frame indices used for these registers - they
91 /// behave like any other frame index in the aligned stack frame. These
92 /// registers also aren't included in DPRCSSize above.
93 unsigned NumAlignedDPRCS2Regs;
95 /// JumpTableUId - Unique id for jumptables.
97 unsigned JumpTableUId;
101 /// VarArgsFrameIndex - FrameIndex for start of varargs area.
102 int VarArgsFrameIndex;
104 /// HasITBlocks - True if IT blocks have been inserted.
107 /// CPEClones - Track constant pool entries clones created by Constant Island
109 DenseMap<unsigned, unsigned> CPEClones;
111 /// GlobalBaseReg - keeps track of the virtual register initialized for
112 /// use as the global base register. This is used for PIC in some PIC
113 /// relocation models.
114 unsigned GlobalBaseReg;
120 VarArgsRegSaveSize(0), HasStackFrame(false), RestoreSPFromFP(false),
121 LRSpilledForFarJump(false),
122 FramePtrSpillOffset(0), GPRCS1Offset(0), GPRCS2Offset(0), DPRCSOffset(0),
123 GPRCS1Size(0), GPRCS2Size(0), DPRCSSize(0),
124 GPRCS1Frames(0), GPRCS2Frames(0), DPRCSFrames(0),
125 NumAlignedDPRCS2Regs(0),
126 JumpTableUId(0), PICLabelUId(0),
127 VarArgsFrameIndex(0), HasITBlocks(false), GlobalBaseReg(0) {}
129 explicit ARMFunctionInfo(MachineFunction &MF) :
130 isThumb(MF.getTarget().getSubtarget<ARMSubtarget>().isThumb()),
131 hasThumb2(MF.getTarget().getSubtarget<ARMSubtarget>().hasThumb2()),
132 VarArgsRegSaveSize(0), HasStackFrame(false), RestoreSPFromFP(false),
133 LRSpilledForFarJump(false),
134 FramePtrSpillOffset(0), GPRCS1Offset(0), GPRCS2Offset(0), DPRCSOffset(0),
135 GPRCS1Size(0), GPRCS2Size(0), DPRCSSize(0),
136 GPRCS1Frames(32), GPRCS2Frames(32), DPRCSFrames(32),
137 JumpTableUId(0), PICLabelUId(0),
138 VarArgsFrameIndex(0), HasITBlocks(false), GlobalBaseReg(0) {}
140 bool isThumbFunction() const { return isThumb; }
141 bool isThumb1OnlyFunction() const { return isThumb && !hasThumb2; }
142 bool isThumb2Function() const { return isThumb && hasThumb2; }
144 unsigned getVarArgsRegSaveSize() const { return VarArgsRegSaveSize; }
145 void setVarArgsRegSaveSize(unsigned s) { VarArgsRegSaveSize = s; }
147 bool hasStackFrame() const { return HasStackFrame; }
148 void setHasStackFrame(bool s) { HasStackFrame = s; }
150 bool shouldRestoreSPFromFP() const { return RestoreSPFromFP; }
151 void setShouldRestoreSPFromFP(bool s) { RestoreSPFromFP = s; }
153 bool isLRSpilledForFarJump() const { return LRSpilledForFarJump; }
154 void setLRIsSpilledForFarJump(bool s) { LRSpilledForFarJump = s; }
156 unsigned getFramePtrSpillOffset() const { return FramePtrSpillOffset; }
157 void setFramePtrSpillOffset(unsigned o) { FramePtrSpillOffset = o; }
159 unsigned getNumAlignedDPRCS2Regs() const { return NumAlignedDPRCS2Regs; }
160 void setNumAlignedDPRCS2Regs(unsigned n) { NumAlignedDPRCS2Regs = n; }
162 unsigned getGPRCalleeSavedArea1Offset() const { return GPRCS1Offset; }
163 unsigned getGPRCalleeSavedArea2Offset() const { return GPRCS2Offset; }
164 unsigned getDPRCalleeSavedAreaOffset() const { return DPRCSOffset; }
166 void setGPRCalleeSavedArea1Offset(unsigned o) { GPRCS1Offset = o; }
167 void setGPRCalleeSavedArea2Offset(unsigned o) { GPRCS2Offset = o; }
168 void setDPRCalleeSavedAreaOffset(unsigned o) { DPRCSOffset = o; }
170 unsigned getGPRCalleeSavedArea1Size() const { return GPRCS1Size; }
171 unsigned getGPRCalleeSavedArea2Size() const { return GPRCS2Size; }
172 unsigned getDPRCalleeSavedAreaSize() const { return DPRCSSize; }
174 void setGPRCalleeSavedArea1Size(unsigned s) { GPRCS1Size = s; }
175 void setGPRCalleeSavedArea2Size(unsigned s) { GPRCS2Size = s; }
176 void setDPRCalleeSavedAreaSize(unsigned s) { DPRCSSize = s; }
178 bool isGPRCalleeSavedArea1Frame(int fi) const {
179 if (fi < 0 || fi >= (int)GPRCS1Frames.size())
181 return GPRCS1Frames[fi];
183 bool isGPRCalleeSavedArea2Frame(int fi) const {
184 if (fi < 0 || fi >= (int)GPRCS2Frames.size())
186 return GPRCS2Frames[fi];
188 bool isDPRCalleeSavedAreaFrame(int fi) const {
189 if (fi < 0 || fi >= (int)DPRCSFrames.size())
191 return DPRCSFrames[fi];
194 void addGPRCalleeSavedArea1Frame(int fi) {
196 int Size = GPRCS1Frames.size();
201 GPRCS1Frames.resize(Size);
203 GPRCS1Frames[fi] = true;
206 void addGPRCalleeSavedArea2Frame(int fi) {
208 int Size = GPRCS2Frames.size();
213 GPRCS2Frames.resize(Size);
215 GPRCS2Frames[fi] = true;
218 void addDPRCalleeSavedAreaFrame(int fi) {
220 int Size = DPRCSFrames.size();
225 DPRCSFrames.resize(Size);
227 DPRCSFrames[fi] = true;
231 unsigned createJumpTableUId() {
232 return JumpTableUId++;
235 unsigned getNumJumpTables() const {
239 void initPICLabelUId(unsigned UId) {
243 unsigned getNumPICLabels() const {
247 unsigned createPICLabelUId() {
248 return PICLabelUId++;
251 int getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
252 void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; }
254 bool hasITBlocks() const { return HasITBlocks; }
255 void setHasITBlocks(bool h) { HasITBlocks = h; }
257 unsigned getGlobalBaseReg() const { return GlobalBaseReg; }
258 void setGlobalBaseReg(unsigned Reg) { GlobalBaseReg = Reg; }
260 void recordCPEClone(unsigned CPIdx, unsigned CPCloneIdx) {
261 if (!CPEClones.insert(std::make_pair(CPCloneIdx, CPIdx)).second)
262 assert(0 && "Duplicate entries!");
265 unsigned getOriginalCPIdx(unsigned CloneIdx) const {
266 DenseMap<unsigned, unsigned>::const_iterator I = CPEClones.find(CloneIdx);
267 if (I != CPEClones.end())
273 } // End llvm namespace
275 #endif // ARMMACHINEFUNCTIONINFO_H