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 {
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
67 unsigned GPRCS1Offset;
68 unsigned GPRCS2Offset;
71 /// GPRCS1Size, GPRCS2Size, DPRCSSize - Sizes of callee saved register spills
77 /// GPRCS1Frames, GPRCS2Frames, DPRCSFrames - Keeps track of frame indices
78 /// which belong to these spill areas.
79 BitVector GPRCS1Frames;
80 BitVector GPRCS2Frames;
81 BitVector DPRCSFrames;
83 /// JumpTableUId - Unique id for jumptables.
85 unsigned JumpTableUId;
89 /// VarArgsFrameIndex - FrameIndex for start of varargs area.
90 int VarArgsFrameIndex;
92 /// HasITBlocks - True if IT blocks have been inserted.
95 /// CPEClones - Track constant pool entries clones created by Constant Island
97 DenseMap<unsigned, unsigned> CPEClones;
103 VarArgsRegSaveSize(0), HasStackFrame(false), RestoreSPFromFP(false),
104 LRSpilledForFarJump(false),
105 FramePtrSpillOffset(0), GPRCS1Offset(0), GPRCS2Offset(0), DPRCSOffset(0),
106 GPRCS1Size(0), GPRCS2Size(0), DPRCSSize(0),
107 GPRCS1Frames(0), GPRCS2Frames(0), DPRCSFrames(0),
108 JumpTableUId(0), PICLabelUId(0),
109 VarArgsFrameIndex(0), HasITBlocks(false) {}
111 explicit ARMFunctionInfo(MachineFunction &MF) :
112 isThumb(MF.getTarget().getSubtarget<ARMSubtarget>().isThumb()),
113 hasThumb2(MF.getTarget().getSubtarget<ARMSubtarget>().hasThumb2()),
114 VarArgsRegSaveSize(0), HasStackFrame(false), RestoreSPFromFP(false),
115 LRSpilledForFarJump(false),
116 FramePtrSpillOffset(0), GPRCS1Offset(0), GPRCS2Offset(0), DPRCSOffset(0),
117 GPRCS1Size(0), GPRCS2Size(0), DPRCSSize(0),
118 GPRCS1Frames(32), GPRCS2Frames(32), DPRCSFrames(32),
119 JumpTableUId(0), PICLabelUId(0),
120 VarArgsFrameIndex(0), HasITBlocks(false) {}
122 bool isThumbFunction() const { return isThumb; }
123 bool isThumb1OnlyFunction() const { return isThumb && !hasThumb2; }
124 bool isThumb2Function() const { return isThumb && hasThumb2; }
126 unsigned getVarArgsRegSaveSize() const { return VarArgsRegSaveSize; }
127 void setVarArgsRegSaveSize(unsigned s) { VarArgsRegSaveSize = s; }
129 bool hasStackFrame() const { return HasStackFrame; }
130 void setHasStackFrame(bool s) { HasStackFrame = s; }
132 bool shouldRestoreSPFromFP() const { return RestoreSPFromFP; }
133 void setShouldRestoreSPFromFP(bool s) { RestoreSPFromFP = s; }
135 bool isLRSpilledForFarJump() const { return LRSpilledForFarJump; }
136 void setLRIsSpilledForFarJump(bool s) { LRSpilledForFarJump = s; }
138 unsigned getFramePtrSpillOffset() const { return FramePtrSpillOffset; }
139 void setFramePtrSpillOffset(unsigned o) { FramePtrSpillOffset = o; }
141 unsigned getGPRCalleeSavedArea1Offset() const { return GPRCS1Offset; }
142 unsigned getGPRCalleeSavedArea2Offset() const { return GPRCS2Offset; }
143 unsigned getDPRCalleeSavedAreaOffset() const { return DPRCSOffset; }
145 void setGPRCalleeSavedArea1Offset(unsigned o) { GPRCS1Offset = o; }
146 void setGPRCalleeSavedArea2Offset(unsigned o) { GPRCS2Offset = o; }
147 void setDPRCalleeSavedAreaOffset(unsigned o) { DPRCSOffset = o; }
149 unsigned getGPRCalleeSavedArea1Size() const { return GPRCS1Size; }
150 unsigned getGPRCalleeSavedArea2Size() const { return GPRCS2Size; }
151 unsigned getDPRCalleeSavedAreaSize() const { return DPRCSSize; }
153 void setGPRCalleeSavedArea1Size(unsigned s) { GPRCS1Size = s; }
154 void setGPRCalleeSavedArea2Size(unsigned s) { GPRCS2Size = s; }
155 void setDPRCalleeSavedAreaSize(unsigned s) { DPRCSSize = s; }
157 bool isGPRCalleeSavedArea1Frame(int fi) const {
158 if (fi < 0 || fi >= (int)GPRCS1Frames.size())
160 return GPRCS1Frames[fi];
162 bool isGPRCalleeSavedArea2Frame(int fi) const {
163 if (fi < 0 || fi >= (int)GPRCS2Frames.size())
165 return GPRCS2Frames[fi];
167 bool isDPRCalleeSavedAreaFrame(int fi) const {
168 if (fi < 0 || fi >= (int)DPRCSFrames.size())
170 return DPRCSFrames[fi];
173 void addGPRCalleeSavedArea1Frame(int fi) {
175 int Size = GPRCS1Frames.size();
180 GPRCS1Frames.resize(Size);
182 GPRCS1Frames[fi] = true;
185 void addGPRCalleeSavedArea2Frame(int fi) {
187 int Size = GPRCS2Frames.size();
192 GPRCS2Frames.resize(Size);
194 GPRCS2Frames[fi] = true;
197 void addDPRCalleeSavedAreaFrame(int fi) {
199 int Size = DPRCSFrames.size();
204 DPRCSFrames.resize(Size);
206 DPRCSFrames[fi] = true;
210 unsigned createJumpTableUId() {
211 return JumpTableUId++;
214 unsigned getNumJumpTables() const {
218 void initPICLabelUId(unsigned UId) {
222 unsigned getNumPICLabels() const {
226 unsigned createPICLabelUId() {
227 return PICLabelUId++;
230 int getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
231 void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; }
233 bool hasITBlocks() const { return HasITBlocks; }
234 void setHasITBlocks(bool h) { HasITBlocks = h; }
236 void recordCPEClone(unsigned CPIdx, unsigned CPCloneIdx) {
237 if (!CPEClones.insert(std::make_pair(CPCloneIdx, CPIdx)).second)
238 assert(0 && "Duplicate entries!");
241 unsigned getOriginalCPIdx(unsigned CloneIdx) const {
242 DenseMap<unsigned, unsigned>::const_iterator I = CPEClones.find(CloneIdx);
243 if (I != CPEClones.end())
249 } // End llvm namespace
251 #endif // ARMMACHINEFUNCTIONINFO_H