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 /// 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;
46 /// VarArgsRegSaveSize - Size of the register save area for vararg functions.
48 unsigned ArgRegsSaveSize;
50 /// HasStackFrame - True if this function has a stack frame. Set by
51 /// processFunctionBeforeCalleeSavedScan().
54 /// RestoreSPFromFP - True if epilogue should restore SP from FP. Set by
58 /// LRSpilledForFarJump - True if the LR register has been for spilled to
60 bool LRSpilledForFarJump;
62 /// FramePtrSpillOffset - If HasStackFrame, this records the frame pointer
63 /// spill stack offset.
64 unsigned FramePtrSpillOffset;
66 /// GPRCS1Offset, GPRCS2Offset, DPRCSOffset - Starting offset of callee saved
67 /// register spills areas. For Mac OS X:
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
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;
81 /// GPRCS1Size, GPRCS2Size, DPRCSSize - Sizes of callee saved register spills
87 /// GPRCS1Frames, GPRCS2Frames, DPRCSFrames - Keeps track of frame indices
88 /// which belong to these spill areas.
89 BitVector GPRCS1Frames;
90 BitVector GPRCS2Frames;
91 BitVector DPRCSFrames;
93 /// NumAlignedDPRCS2Regs - The number of callee-saved DPRs that are saved in
94 /// the aligned portion of the stack frame. This is always a contiguous
95 /// sequence of D-registers starting from d8.
97 /// We do not keep track of the frame indices used for these registers - they
98 /// behave like any other frame index in the aligned stack frame. These
99 /// registers also aren't included in DPRCSSize above.
100 unsigned NumAlignedDPRCS2Regs;
102 /// JumpTableUId - Unique id for jumptables.
104 unsigned JumpTableUId;
106 unsigned PICLabelUId;
108 /// VarArgsFrameIndex - FrameIndex for start of varargs area.
109 int VarArgsFrameIndex;
111 /// HasITBlocks - True if IT blocks have been inserted.
114 /// CPEClones - Track constant pool entries clones created by Constant Island
116 DenseMap<unsigned, unsigned> CPEClones;
118 /// GlobalBaseReg - keeps track of the virtual register initialized for
119 /// use as the global base register. This is used for PIC in some PIC
120 /// relocation models.
121 unsigned GlobalBaseReg;
127 ArgRegsSaveSize(0), HasStackFrame(false), RestoreSPFromFP(false),
128 LRSpilledForFarJump(false),
129 FramePtrSpillOffset(0), GPRCS1Offset(0), GPRCS2Offset(0), DPRCSOffset(0),
130 GPRCS1Size(0), GPRCS2Size(0), DPRCSSize(0),
131 GPRCS1Frames(0), GPRCS2Frames(0), DPRCSFrames(0),
132 NumAlignedDPRCS2Regs(0),
133 JumpTableUId(0), PICLabelUId(0),
134 VarArgsFrameIndex(0), HasITBlocks(false), GlobalBaseReg(0) {}
136 explicit ARMFunctionInfo(MachineFunction &MF) :
137 isThumb(MF.getTarget().getSubtarget<ARMSubtarget>().isThumb()),
138 hasThumb2(MF.getTarget().getSubtarget<ARMSubtarget>().hasThumb2()),
139 StByValParamsPadding(0),
140 ArgRegsSaveSize(0), HasStackFrame(false), RestoreSPFromFP(false),
141 LRSpilledForFarJump(false),
142 FramePtrSpillOffset(0), GPRCS1Offset(0), GPRCS2Offset(0), DPRCSOffset(0),
143 GPRCS1Size(0), GPRCS2Size(0), DPRCSSize(0),
144 GPRCS1Frames(32), GPRCS2Frames(32), DPRCSFrames(32),
145 JumpTableUId(0), PICLabelUId(0),
146 VarArgsFrameIndex(0), HasITBlocks(false), GlobalBaseReg(0) {}
148 bool isThumbFunction() const { return isThumb; }
149 bool isThumb1OnlyFunction() const { return isThumb && !hasThumb2; }
150 bool isThumb2Function() const { return isThumb && hasThumb2; }
152 unsigned getStoredByValParamsPadding() const { return StByValParamsPadding; }
153 void setStoredByValParamsPadding(unsigned p) { StByValParamsPadding = p; }
155 unsigned getArgRegsSaveSize(unsigned Align = 0) const {
157 return ArgRegsSaveSize;
158 return (ArgRegsSaveSize + Align - 1) & ~(Align - 1);
160 void setArgRegsSaveSize(unsigned s) { ArgRegsSaveSize = s; }
162 bool hasStackFrame() const { return HasStackFrame; }
163 void setHasStackFrame(bool s) { HasStackFrame = s; }
165 bool shouldRestoreSPFromFP() const { return RestoreSPFromFP; }
166 void setShouldRestoreSPFromFP(bool s) { RestoreSPFromFP = s; }
168 bool isLRSpilledForFarJump() const { return LRSpilledForFarJump; }
169 void setLRIsSpilledForFarJump(bool s) { LRSpilledForFarJump = s; }
171 unsigned getFramePtrSpillOffset() const { return FramePtrSpillOffset; }
172 void setFramePtrSpillOffset(unsigned o) { FramePtrSpillOffset = o; }
174 unsigned getNumAlignedDPRCS2Regs() const { return NumAlignedDPRCS2Regs; }
175 void setNumAlignedDPRCS2Regs(unsigned n) { NumAlignedDPRCS2Regs = n; }
177 unsigned getGPRCalleeSavedArea1Offset() const { return GPRCS1Offset; }
178 unsigned getGPRCalleeSavedArea2Offset() const { return GPRCS2Offset; }
179 unsigned getDPRCalleeSavedAreaOffset() const { return DPRCSOffset; }
181 void setGPRCalleeSavedArea1Offset(unsigned o) { GPRCS1Offset = o; }
182 void setGPRCalleeSavedArea2Offset(unsigned o) { GPRCS2Offset = o; }
183 void setDPRCalleeSavedAreaOffset(unsigned o) { DPRCSOffset = o; }
185 unsigned getGPRCalleeSavedArea1Size() const { return GPRCS1Size; }
186 unsigned getGPRCalleeSavedArea2Size() const { return GPRCS2Size; }
187 unsigned getDPRCalleeSavedAreaSize() const { return DPRCSSize; }
189 void setGPRCalleeSavedArea1Size(unsigned s) { GPRCS1Size = s; }
190 void setGPRCalleeSavedArea2Size(unsigned s) { GPRCS2Size = s; }
191 void setDPRCalleeSavedAreaSize(unsigned s) { DPRCSSize = s; }
193 bool isGPRCalleeSavedArea1Frame(int fi) const {
194 if (fi < 0 || fi >= (int)GPRCS1Frames.size())
196 return GPRCS1Frames[fi];
198 bool isGPRCalleeSavedArea2Frame(int fi) const {
199 if (fi < 0 || fi >= (int)GPRCS2Frames.size())
201 return GPRCS2Frames[fi];
203 bool isDPRCalleeSavedAreaFrame(int fi) const {
204 if (fi < 0 || fi >= (int)DPRCSFrames.size())
206 return DPRCSFrames[fi];
209 void addGPRCalleeSavedArea1Frame(int fi) {
211 int Size = GPRCS1Frames.size();
216 GPRCS1Frames.resize(Size);
218 GPRCS1Frames[fi] = true;
221 void addGPRCalleeSavedArea2Frame(int fi) {
223 int Size = GPRCS2Frames.size();
228 GPRCS2Frames.resize(Size);
230 GPRCS2Frames[fi] = true;
233 void addDPRCalleeSavedAreaFrame(int fi) {
235 int Size = DPRCSFrames.size();
240 DPRCSFrames.resize(Size);
242 DPRCSFrames[fi] = true;
246 unsigned createJumpTableUId() {
247 return JumpTableUId++;
250 unsigned getNumJumpTables() const {
254 void initPICLabelUId(unsigned UId) {
258 unsigned getNumPICLabels() const {
262 unsigned createPICLabelUId() {
263 return PICLabelUId++;
266 int getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
267 void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; }
269 bool hasITBlocks() const { return HasITBlocks; }
270 void setHasITBlocks(bool h) { HasITBlocks = h; }
272 unsigned getGlobalBaseReg() const { return GlobalBaseReg; }
273 void setGlobalBaseReg(unsigned Reg) { GlobalBaseReg = Reg; }
275 void recordCPEClone(unsigned CPIdx, unsigned CPCloneIdx) {
276 if (!CPEClones.insert(std::make_pair(CPCloneIdx, CPIdx)).second)
277 assert(0 && "Duplicate entries!");
280 unsigned getOriginalCPIdx(unsigned CloneIdx) const {
281 DenseMap<unsigned, unsigned>::const_iterator I = CPEClones.find(CloneIdx);
282 if (I != CPEClones.end())
288 } // End llvm namespace
290 #endif // ARMMACHINEFUNCTIONINFO_H