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 > 4, and GPRs-part-size mod StackAlignment != 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 /// 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.
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;
96 /// JumpTableUId - Unique id for jumptables.
98 unsigned JumpTableUId;
100 unsigned PICLabelUId;
102 /// VarArgsFrameIndex - FrameIndex for start of varargs area.
103 int VarArgsFrameIndex;
105 /// HasITBlocks - True if IT blocks have been inserted.
108 /// CPEClones - Track constant pool entries clones created by Constant Island
110 DenseMap<unsigned, unsigned> CPEClones;
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;
117 /// ArgumentStackSize - amount of bytes on stack consumed by the arguments
118 /// being passed on the stack
119 unsigned ArgumentStackSize;
125 ArgRegsSaveSize(0), HasStackFrame(false), RestoreSPFromFP(false),
126 LRSpilledForFarJump(false),
127 FramePtrSpillOffset(0), GPRCS1Offset(0), GPRCS2Offset(0), DPRCSOffset(0),
128 GPRCS1Size(0), GPRCS2Size(0), DPRCSSize(0),
129 NumAlignedDPRCS2Regs(0),
130 JumpTableUId(0), PICLabelUId(0),
131 VarArgsFrameIndex(0), HasITBlocks(false), GlobalBaseReg(0) {}
133 explicit ARMFunctionInfo(MachineFunction &MF);
135 bool isThumbFunction() const { return isThumb; }
136 bool isThumb1OnlyFunction() const { return isThumb && !hasThumb2; }
137 bool isThumb2Function() const { return isThumb && hasThumb2; }
139 unsigned getStoredByValParamsPadding() const { return StByValParamsPadding; }
140 void setStoredByValParamsPadding(unsigned p) { StByValParamsPadding = p; }
142 unsigned getArgRegsSaveSize(unsigned Align = 0) const {
144 return ArgRegsSaveSize;
145 return (ArgRegsSaveSize + Align - 1) & ~(Align - 1);
147 void setArgRegsSaveSize(unsigned s) { ArgRegsSaveSize = s; }
149 bool hasStackFrame() const { return HasStackFrame; }
150 void setHasStackFrame(bool s) { HasStackFrame = s; }
152 bool shouldRestoreSPFromFP() const { return RestoreSPFromFP; }
153 void setShouldRestoreSPFromFP(bool s) { RestoreSPFromFP = s; }
155 bool isLRSpilledForFarJump() const { return LRSpilledForFarJump; }
156 void setLRIsSpilledForFarJump(bool s) { LRSpilledForFarJump = s; }
158 unsigned getFramePtrSpillOffset() const { return FramePtrSpillOffset; }
159 void setFramePtrSpillOffset(unsigned o) { FramePtrSpillOffset = o; }
161 unsigned getNumAlignedDPRCS2Regs() const { return NumAlignedDPRCS2Regs; }
162 void setNumAlignedDPRCS2Regs(unsigned n) { NumAlignedDPRCS2Regs = n; }
164 unsigned getGPRCalleeSavedArea1Offset() const { return GPRCS1Offset; }
165 unsigned getGPRCalleeSavedArea2Offset() const { return GPRCS2Offset; }
166 unsigned getDPRCalleeSavedAreaOffset() const { return DPRCSOffset; }
168 void setGPRCalleeSavedArea1Offset(unsigned o) { GPRCS1Offset = o; }
169 void setGPRCalleeSavedArea2Offset(unsigned o) { GPRCS2Offset = o; }
170 void setDPRCalleeSavedAreaOffset(unsigned o) { DPRCSOffset = o; }
172 unsigned getGPRCalleeSavedArea1Size() const { return GPRCS1Size; }
173 unsigned getGPRCalleeSavedArea2Size() const { return GPRCS2Size; }
174 unsigned getDPRCalleeSavedAreaSize() const { return DPRCSSize; }
176 void setGPRCalleeSavedArea1Size(unsigned s) { GPRCS1Size = s; }
177 void setGPRCalleeSavedArea2Size(unsigned s) { GPRCS2Size = s; }
178 void setDPRCalleeSavedAreaSize(unsigned s) { DPRCSSize = s; }
180 unsigned getArgumentStackSize() const { return ArgumentStackSize; }
181 void setArgumentStackSize(unsigned size) { ArgumentStackSize = size; }
183 unsigned createJumpTableUId() {
184 return JumpTableUId++;
187 unsigned getNumJumpTables() const {
191 void initPICLabelUId(unsigned UId) {
195 unsigned getNumPICLabels() const {
199 unsigned createPICLabelUId() {
200 return PICLabelUId++;
203 int getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
204 void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; }
206 bool hasITBlocks() const { return HasITBlocks; }
207 void setHasITBlocks(bool h) { HasITBlocks = h; }
209 unsigned getGlobalBaseReg() const { return GlobalBaseReg; }
210 void setGlobalBaseReg(unsigned Reg) { GlobalBaseReg = Reg; }
212 void recordCPEClone(unsigned CPIdx, unsigned CPCloneIdx) {
213 if (!CPEClones.insert(std::make_pair(CPCloneIdx, CPIdx)).second)
214 llvm_unreachable("Duplicate entries!");
217 unsigned getOriginalCPIdx(unsigned CloneIdx) const {
218 DenseMap<unsigned, unsigned>::const_iterator I = CPEClones.find(CloneIdx);
219 if (I != CPEClones.end())
225 } // End llvm namespace
227 #endif // ARMMACHINEFUNCTIONINFO_H