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"
22 #include "llvm/ADT/DenseMap.h"
26 /// ARMFunctionInfo - This class is derived from MachineFunctionInfo and
27 /// contains private ARM-specific information for each MachineFunction.
28 class ARMFunctionInfo : public MachineFunctionInfo {
29 virtual void anchor();
31 /// isThumb - True if this function is compiled under Thumb mode.
32 /// Used to initialized Align, so must precede it.
35 /// hasThumb2 - True if the target architecture supports Thumb2. Do not use
36 /// to determine if function is compiled under Thumb mode, for that use
40 /// StByValParamsPadding - For parameter that is split between
41 /// GPRs and memory; while recovering GPRs part, when
42 /// StackAlignment > 4, and GPRs-part-size mod StackAlignment != 0,
43 /// we need to insert gap before parameter start address. It allows to
44 /// "attach" GPR-part to the part that was passed via stack.
45 unsigned StByValParamsPadding;
47 /// VarArgsRegSaveSize - Size of the register save area for vararg functions.
49 unsigned ArgRegsSaveSize;
51 /// ReturnRegsCount - Number of registers used up in the return.
52 unsigned ReturnRegsCount;
54 /// HasStackFrame - True if this function has a stack frame. Set by
55 /// processFunctionBeforeCalleeSavedScan().
58 /// RestoreSPFromFP - True if epilogue should restore SP from FP. Set by
62 /// LRSpilledForFarJump - True if the LR register has been for spilled to
64 bool LRSpilledForFarJump;
66 /// FramePtrSpillOffset - If HasStackFrame, this records the frame pointer
67 /// spill stack offset.
68 unsigned FramePtrSpillOffset;
70 /// GPRCS1Offset, GPRCS2Offset, DPRCSOffset - Starting offset of callee saved
71 /// register spills areas. For Mac OS X:
73 /// GPR callee-saved (1) : r4, r5, r6, r7, lr
74 /// --------------------------------------------
75 /// GPR callee-saved (2) : r8, r10, r11
76 /// --------------------------------------------
77 /// DPR callee-saved : d8 - d15
79 /// Also see AlignedDPRCSRegs below. Not all D-regs need to go in area 3.
80 /// Some may be spilled after the stack has been realigned.
81 unsigned GPRCS1Offset;
82 unsigned GPRCS2Offset;
85 /// GPRCS1Size, GPRCS2Size, DPRCSSize - Sizes of callee saved register spills
91 /// NumAlignedDPRCS2Regs - The number of callee-saved DPRs that are saved in
92 /// the aligned portion of the stack frame. This is always a contiguous
93 /// sequence of D-registers starting from d8.
95 /// We do not keep track of the frame indices used for these registers - they
96 /// behave like any other frame index in the aligned stack frame. These
97 /// registers also aren't included in DPRCSSize above.
98 unsigned NumAlignedDPRCS2Regs;
100 /// JumpTableUId - Unique id for jumptables.
102 unsigned JumpTableUId;
104 unsigned PICLabelUId;
106 /// VarArgsFrameIndex - FrameIndex for start of varargs area.
107 int VarArgsFrameIndex;
109 /// HasITBlocks - True if IT blocks have been inserted.
112 /// CPEClones - Track constant pool entries clones created by Constant Island
114 DenseMap<unsigned, unsigned> CPEClones;
116 /// GlobalBaseReg - keeps track of the virtual register initialized for
117 /// use as the global base register. This is used for PIC in some PIC
118 /// relocation models.
119 unsigned GlobalBaseReg;
121 /// ArgumentStackSize - amount of bytes on stack consumed by the arguments
122 /// being passed on the stack
123 unsigned ArgumentStackSize;
125 /// CoalescedWeights - mapping of basic blocks to the rolling counter of
126 /// coalesced weights.
127 DenseMap<const MachineBasicBlock*, unsigned> CoalescedWeights;
133 ArgRegsSaveSize(0), ReturnRegsCount(0), HasStackFrame(false),
134 RestoreSPFromFP(false),
135 LRSpilledForFarJump(false),
136 FramePtrSpillOffset(0), GPRCS1Offset(0), GPRCS2Offset(0), DPRCSOffset(0),
137 GPRCS1Size(0), GPRCS2Size(0), DPRCSSize(0),
138 NumAlignedDPRCS2Regs(0),
139 JumpTableUId(0), PICLabelUId(0),
140 VarArgsFrameIndex(0), HasITBlocks(false), GlobalBaseReg(0) {}
142 explicit ARMFunctionInfo(MachineFunction &MF);
144 bool isThumbFunction() const { return isThumb; }
145 bool isThumb1OnlyFunction() const { return isThumb && !hasThumb2; }
146 bool isThumb2Function() const { return isThumb && hasThumb2; }
148 unsigned getStoredByValParamsPadding() const { return StByValParamsPadding; }
149 void setStoredByValParamsPadding(unsigned p) { StByValParamsPadding = p; }
151 unsigned getArgRegsSaveSize(unsigned Align = 0) const {
153 return ArgRegsSaveSize;
154 return (ArgRegsSaveSize + Align - 1) & ~(Align - 1);
156 void setArgRegsSaveSize(unsigned s) { ArgRegsSaveSize = s; }
158 unsigned getReturnRegsCount() const { return ReturnRegsCount; }
159 void setReturnRegsCount(unsigned s) { ReturnRegsCount = s; }
161 bool hasStackFrame() const { return HasStackFrame; }
162 void setHasStackFrame(bool s) { HasStackFrame = s; }
164 bool shouldRestoreSPFromFP() const { return RestoreSPFromFP; }
165 void setShouldRestoreSPFromFP(bool s) { RestoreSPFromFP = s; }
167 bool isLRSpilledForFarJump() const { return LRSpilledForFarJump; }
168 void setLRIsSpilledForFarJump(bool s) { LRSpilledForFarJump = s; }
170 unsigned getFramePtrSpillOffset() const { return FramePtrSpillOffset; }
171 void setFramePtrSpillOffset(unsigned o) { FramePtrSpillOffset = o; }
173 unsigned getNumAlignedDPRCS2Regs() const { return NumAlignedDPRCS2Regs; }
174 void setNumAlignedDPRCS2Regs(unsigned n) { NumAlignedDPRCS2Regs = n; }
176 unsigned getGPRCalleeSavedArea1Offset() const { return GPRCS1Offset; }
177 unsigned getGPRCalleeSavedArea2Offset() const { return GPRCS2Offset; }
178 unsigned getDPRCalleeSavedAreaOffset() const { return DPRCSOffset; }
180 void setGPRCalleeSavedArea1Offset(unsigned o) { GPRCS1Offset = o; }
181 void setGPRCalleeSavedArea2Offset(unsigned o) { GPRCS2Offset = o; }
182 void setDPRCalleeSavedAreaOffset(unsigned o) { DPRCSOffset = o; }
184 unsigned getGPRCalleeSavedArea1Size() const { return GPRCS1Size; }
185 unsigned getGPRCalleeSavedArea2Size() const { return GPRCS2Size; }
186 unsigned getDPRCalleeSavedAreaSize() const { return DPRCSSize; }
188 void setGPRCalleeSavedArea1Size(unsigned s) { GPRCS1Size = s; }
189 void setGPRCalleeSavedArea2Size(unsigned s) { GPRCS2Size = s; }
190 void setDPRCalleeSavedAreaSize(unsigned s) { DPRCSSize = s; }
192 unsigned getArgumentStackSize() const { return ArgumentStackSize; }
193 void setArgumentStackSize(unsigned size) { ArgumentStackSize = size; }
195 unsigned createJumpTableUId() {
196 return JumpTableUId++;
199 unsigned getNumJumpTables() const {
203 void initPICLabelUId(unsigned UId) {
207 unsigned getNumPICLabels() const {
211 unsigned createPICLabelUId() {
212 return PICLabelUId++;
215 int getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
216 void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; }
218 bool hasITBlocks() const { return HasITBlocks; }
219 void setHasITBlocks(bool h) { HasITBlocks = h; }
221 unsigned getGlobalBaseReg() const { return GlobalBaseReg; }
222 void setGlobalBaseReg(unsigned Reg) { GlobalBaseReg = Reg; }
224 void recordCPEClone(unsigned CPIdx, unsigned CPCloneIdx) {
225 if (!CPEClones.insert(std::make_pair(CPCloneIdx, CPIdx)).second)
226 llvm_unreachable("Duplicate entries!");
229 unsigned getOriginalCPIdx(unsigned CloneIdx) const {
230 DenseMap<unsigned, unsigned>::const_iterator I = CPEClones.find(CloneIdx);
231 if (I != CPEClones.end())
237 DenseMap<const MachineBasicBlock*, unsigned>::iterator getCoalescedWeight(
238 MachineBasicBlock* MBB) {
239 auto It = CoalescedWeights.find(MBB);
240 if (It == CoalescedWeights.end()) {
241 It = CoalescedWeights.insert(std::make_pair(MBB, 0)).first;
246 } // End llvm namespace
248 #endif // ARMMACHINEFUNCTIONINFO_H