lib/Target/ARM/ARMMachineFunctionInfo.h

   1 //====- ARMMachineFuctionInfo.h - ARM machine function info -----*- C++ -*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // This file declares ARM-specific per-machine-function information.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #ifndef ARMMACHINEFUNCTIONINFO_H
  15 #define ARMMACHINEFUNCTIONINFO_H
  16
  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"
  22
  23 namespace llvm {
  24
  25 /// ARMFunctionInfo - This class is derived from MachineFunction private
  26 /// ARM target-specific information for each MachineFunction.
  27 class ARMFunctionInfo : public MachineFunctionInfo {
  28
  29   /// isThumb - True if this function is compiled under Thumb mode.
  30   /// Used to initialized Align, so must precede it.
  31   bool isThumb;
  32
  33   /// Align - required alignment.  ARM functions and Thumb functions with
  34   /// constant pools require 4-byte alignment; other Thumb functions
  35   /// require only 2-byte alignment.
  36   unsigned Align;
  37
  38   /// VarArgsRegSaveSize - Size of the register save area for vararg functions.
  39   ///
  40   unsigned VarArgsRegSaveSize;
  41
  42   /// HasStackFrame - True if this function has a stack frame. Set by
  43   /// processFunctionBeforeCalleeSavedScan().
  44   bool HasStackFrame;
  45
  46   /// LRSpilledForFarJump - True if the LR register has been for spilled to
  47   /// enable far jump.
  48   bool LRSpilledForFarJump;
  49
  50   /// R3IsLiveIn - True if R3 is live in to this function.
  51   /// FIXME: Remove when register scavenger for Thumb is done.
  52   bool R3IsLiveIn;
  53
  54   /// FramePtrSpillOffset - If HasStackFrame, this records the frame pointer
  55   /// spill stack offset.
  56   unsigned FramePtrSpillOffset;
  57
  58   /// GPRCS1Offset, GPRCS2Offset, DPRCSOffset - Starting offset of callee saved
  59   /// register spills areas. For Mac OS X:
  60   ///
  61   /// GPR callee-saved (1) : r4, r5, r6, r7, lr
  62   /// --------------------------------------------
  63   /// GPR callee-saved (2) : r8, r10, r11
  64   /// --------------------------------------------
  65   /// DPR callee-saved : d8 - d15
  66   unsigned GPRCS1Offset;
  67   unsigned GPRCS2Offset;
  68   unsigned DPRCSOffset;
  69
  70   /// GPRCS1Size, GPRCS2Size, DPRCSSize - Sizes of callee saved register spills
  71   /// areas.
  72   unsigned GPRCS1Size;
  73   unsigned GPRCS2Size;
  74   unsigned DPRCSSize;
  75
  76   /// GPRCS1Frames, GPRCS2Frames, DPRCSFrames - Keeps track of frame indices
  77   /// which belong to these spill areas.
  78   BitVector GPRCS1Frames;
  79   BitVector GPRCS2Frames;
  80   BitVector DPRCSFrames;
  81
  82   /// SpilledCSRegs - A BitVector mask of all spilled callee-saved registers.
  83   ///
  84   BitVector SpilledCSRegs;
  85
  86   /// JumpTableUId - Unique id for jumptables.
  87   ///
  88   unsigned JumpTableUId;
  89
  90   unsigned ConstPoolEntryUId;
  91
  92 public:
  93   ARMFunctionInfo() :
  94     isThumb(false),
  95     Align(2U),
  96     VarArgsRegSaveSize(0), HasStackFrame(false),
  97     LRSpilledForFarJump(false), R3IsLiveIn(false),
  98     FramePtrSpillOffset(0), GPRCS1Offset(0), GPRCS2Offset(0), DPRCSOffset(0),
  99     GPRCS1Size(0), GPRCS2Size(0), DPRCSSize(0),
 100     GPRCS1Frames(0), GPRCS2Frames(0), DPRCSFrames(0),
 101     JumpTableUId(0), ConstPoolEntryUId(0) {}
 102
 103   ARMFunctionInfo(MachineFunction &MF) :
 104     isThumb(MF.getTarget().getSubtarget<ARMSubtarget>().isThumb()),
 105     Align(isThumb ? 1U : 2U),
 106     VarArgsRegSaveSize(0), HasStackFrame(false),
 107     LRSpilledForFarJump(false), R3IsLiveIn(false),
 108     FramePtrSpillOffset(0), GPRCS1Offset(0), GPRCS2Offset(0), DPRCSOffset(0),
 109     GPRCS1Size(0), GPRCS2Size(0), DPRCSSize(0),
 110     GPRCS1Frames(32), GPRCS2Frames(32), DPRCSFrames(32),
 111     SpilledCSRegs(MF.getTarget().getRegisterInfo()->getNumRegs()),
 112     JumpTableUId(0), ConstPoolEntryUId(0) {}
 113
 114   bool isThumbFunction() const { return isThumb; }
 115
 116   unsigned getAlign() const { return Align; }
 117   void setAlign(unsigned a) { Align = a; }
 118
 119   unsigned getVarArgsRegSaveSize() const { return VarArgsRegSaveSize; }
 120   void setVarArgsRegSaveSize(unsigned s) { VarArgsRegSaveSize = s; }
 121
 122   bool hasStackFrame() const { return HasStackFrame; }
 123   void setHasStackFrame(bool s) { HasStackFrame = s; }
 124
 125   bool isLRSpilledForFarJump() const { return LRSpilledForFarJump; }
 126   void setLRIsSpilledForFarJump(bool s) { LRSpilledForFarJump = s; }
 127
 128   // FIXME: Remove when register scavenger for Thumb is done.
 129   bool isR3LiveIn() const { return R3IsLiveIn; }
 130   void setR3IsLiveIn(bool l) { R3IsLiveIn = l; }
 131
 132   unsigned getFramePtrSpillOffset() const { return FramePtrSpillOffset; }
 133   void setFramePtrSpillOffset(unsigned o) { FramePtrSpillOffset = o; }
 134
 135   unsigned getGPRCalleeSavedArea1Offset() const { return GPRCS1Offset; }
 136   unsigned getGPRCalleeSavedArea2Offset() const { return GPRCS2Offset; }
 137   unsigned getDPRCalleeSavedAreaOffset()  const { return DPRCSOffset; }
 138
 139   void setGPRCalleeSavedArea1Offset(unsigned o) { GPRCS1Offset = o; }
 140   void setGPRCalleeSavedArea2Offset(unsigned o) { GPRCS2Offset = o; }
 141   void setDPRCalleeSavedAreaOffset(unsigned o)  { DPRCSOffset = o; }
 142
 143   unsigned getGPRCalleeSavedArea1Size() const { return GPRCS1Size; }
 144   unsigned getGPRCalleeSavedArea2Size() const { return GPRCS2Size; }
 145   unsigned getDPRCalleeSavedAreaSize()  const { return DPRCSSize; }
 146
 147   void setGPRCalleeSavedArea1Size(unsigned s) { GPRCS1Size = s; }
 148   void setGPRCalleeSavedArea2Size(unsigned s) { GPRCS2Size = s; }
 149   void setDPRCalleeSavedAreaSize(unsigned s)  { DPRCSSize = s; }
 150
 151   bool isGPRCalleeSavedArea1Frame(int fi) const {
 152     if (fi < 0 || fi >= (int)GPRCS1Frames.size())
 153       return false;
 154     return GPRCS1Frames[fi];
 155   }
 156   bool isGPRCalleeSavedArea2Frame(int fi) const {
 157     if (fi < 0 || fi >= (int)GPRCS2Frames.size())
 158       return false;
 159     return GPRCS2Frames[fi];
 160   }
 161   bool isDPRCalleeSavedAreaFrame(int fi) const {
 162     if (fi < 0 || fi >= (int)DPRCSFrames.size())
 163       return false;
 164     return DPRCSFrames[fi];
 165   }
 166
 167   void addGPRCalleeSavedArea1Frame(int fi) {
 168     if (fi >= 0) {
 169       int Size = GPRCS1Frames.size();
 170       if (fi >= Size) {
 171         Size *= 2;
 172         if (fi >= Size)
 173           Size = fi+1;
 174         GPRCS1Frames.resize(Size);
 175       }
 176       GPRCS1Frames[fi] = true;
 177     }
 178   }
 179   void addGPRCalleeSavedArea2Frame(int fi) {
 180     if (fi >= 0) {
 181       int Size = GPRCS2Frames.size();
 182       if (fi >= Size) {
 183         Size *= 2;
 184         if (fi >= Size)
 185           Size = fi+1;
 186         GPRCS2Frames.resize(Size);
 187       }
 188       GPRCS2Frames[fi] = true;
 189     }
 190   }
 191   void addDPRCalleeSavedAreaFrame(int fi) {
 192     if (fi >= 0) {
 193       int Size = DPRCSFrames.size();
 194       if (fi >= Size) {
 195         Size *= 2;
 196         if (fi >= Size)
 197           Size = fi+1;
 198         DPRCSFrames.resize(Size);
 199       }
 200       DPRCSFrames[fi] = true;
 201     }
 202   }
 203
 204   void setCSRegisterIsSpilled(unsigned Reg) {
 205     SpilledCSRegs.set(Reg);
 206   }
 207
 208   bool isCSRegisterSpilled(unsigned Reg) const {
 209     return SpilledCSRegs[Reg];
 210   }
 211
 212   const BitVector &getSpilledCSRegisters() const {
 213     return SpilledCSRegs;
 214   }
 215
 216   unsigned createJumpTableUId() {
 217     return JumpTableUId++;
 218   }
 219
 220   unsigned getNumJumpTables() const {
 221     return JumpTableUId;
 222   }
 223
 224   void initConstPoolEntryUId(unsigned UId) {
 225     ConstPoolEntryUId = UId;
 226   }
 227
 228   unsigned getNumConstPoolEntries() const {
 229     return ConstPoolEntryUId;
 230   }
 231
 232   unsigned createConstPoolEntryUId() {
 233     return ConstPoolEntryUId++;
 234   }
 235 };
 236 } // End llvm namespace
 237
 238 #endif // ARMMACHINEFUNCTIONINFO_H