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/MRegisterInfo.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 public:
  91   ARMFunctionInfo() :
  92     isThumb(false),
  93     Align(2U),
  94     VarArgsRegSaveSize(0), HasStackFrame(false),
  95     LRSpilledForFarJump(false), R3IsLiveIn(false),
  96     FramePtrSpillOffset(0), GPRCS1Offset(0), GPRCS2Offset(0), DPRCSOffset(0),
  97     GPRCS1Size(0), GPRCS2Size(0), DPRCSSize(0),
  98     GPRCS1Frames(0), GPRCS2Frames(0), DPRCSFrames(0),
  99     JumpTableUId(0) {}
 100
 101   ARMFunctionInfo(MachineFunction &MF) :
 102     isThumb(MF.getTarget().getSubtarget<ARMSubtarget>().isThumb()),
 103     Align(isThumb ? 1U : 2U),
 104     VarArgsRegSaveSize(0), HasStackFrame(false),
 105     LRSpilledForFarJump(false), R3IsLiveIn(false),
 106     FramePtrSpillOffset(0), GPRCS1Offset(0), GPRCS2Offset(0), DPRCSOffset(0),
 107     GPRCS1Size(0), GPRCS2Size(0), DPRCSSize(0),
 108     GPRCS1Frames(32), GPRCS2Frames(32), DPRCSFrames(32),
 109     SpilledCSRegs(MF.getTarget().getRegisterInfo()->getNumRegs()),
 110     JumpTableUId(0) {}
 111
 112   bool isThumbFunction() const { return isThumb; }
 113
 114   unsigned getAlign() const { return Align; }
 115   void setAlign(unsigned a) { Align = a; }
 116
 117   unsigned getVarArgsRegSaveSize() const { return VarArgsRegSaveSize; }
 118   void setVarArgsRegSaveSize(unsigned s) { VarArgsRegSaveSize = s; }
 119
 120   bool hasStackFrame() const { return HasStackFrame; }
 121   void setHasStackFrame(bool s) { HasStackFrame = s; }
 122
 123   bool isLRSpilledForFarJump() const { return LRSpilledForFarJump; }
 124   void setLRIsSpilledForFarJump(bool s) { LRSpilledForFarJump = s; }
 125
 126   // FIXME: Remove when register scavenger for Thumb is done.
 127   bool isR3LiveIn() const { return R3IsLiveIn; }
 128   void setR3IsLiveIn(bool l) { R3IsLiveIn = l; }
 129
 130   unsigned getFramePtrSpillOffset() const { return FramePtrSpillOffset; }
 131   void setFramePtrSpillOffset(unsigned o) { FramePtrSpillOffset = o; }
 132
 133   unsigned getGPRCalleeSavedArea1Offset() const { return GPRCS1Offset; }
 134   unsigned getGPRCalleeSavedArea2Offset() const { return GPRCS2Offset; }
 135   unsigned getDPRCalleeSavedAreaOffset()  const { return DPRCSOffset; }
 136
 137   void setGPRCalleeSavedArea1Offset(unsigned o) { GPRCS1Offset = o; }
 138   void setGPRCalleeSavedArea2Offset(unsigned o) { GPRCS2Offset = o; }
 139   void setDPRCalleeSavedAreaOffset(unsigned o)  { DPRCSOffset = o; }
 140
 141   unsigned getGPRCalleeSavedArea1Size() const { return GPRCS1Size; }
 142   unsigned getGPRCalleeSavedArea2Size() const { return GPRCS2Size; }
 143   unsigned getDPRCalleeSavedAreaSize()  const { return DPRCSSize; }
 144
 145   void setGPRCalleeSavedArea1Size(unsigned s) { GPRCS1Size = s; }
 146   void setGPRCalleeSavedArea2Size(unsigned s) { GPRCS2Size = s; }
 147   void setDPRCalleeSavedAreaSize(unsigned s)  { DPRCSSize = s; }
 148
 149   bool isGPRCalleeSavedArea1Frame(int fi) const {
 150     if (fi < 0 || fi >= (int)GPRCS1Frames.size())
 151       return false;
 152     return GPRCS1Frames[fi];
 153   }
 154   bool isGPRCalleeSavedArea2Frame(int fi) const {
 155     if (fi < 0 || fi >= (int)GPRCS2Frames.size())
 156       return false;
 157     return GPRCS2Frames[fi];
 158   }
 159   bool isDPRCalleeSavedAreaFrame(int fi) const {
 160     if (fi < 0 || fi >= (int)DPRCSFrames.size())
 161       return false;
 162     return DPRCSFrames[fi];
 163   }
 164
 165   void addGPRCalleeSavedArea1Frame(int fi) {
 166     if (fi >= 0) {
 167       int Size = GPRCS1Frames.size();
 168       if (fi >= Size) {
 169         Size *= 2;
 170         if (fi >= Size)
 171           Size = fi+1;
 172         GPRCS1Frames.resize(Size);
 173       }
 174       GPRCS1Frames[fi] = true;
 175     }
 176   }
 177   void addGPRCalleeSavedArea2Frame(int fi) {
 178     if (fi >= 0) {
 179       int Size = GPRCS2Frames.size();
 180       if (fi >= Size) {
 181         Size *= 2;
 182         if (fi >= Size)
 183           Size = fi+1;
 184         GPRCS2Frames.resize(Size);
 185       }
 186       GPRCS2Frames[fi] = true;
 187     }
 188   }
 189   void addDPRCalleeSavedAreaFrame(int fi) {
 190     if (fi >= 0) {
 191       int Size = DPRCSFrames.size();
 192       if (fi >= Size) {
 193         Size *= 2;
 194         if (fi >= Size)
 195           Size = fi+1;
 196         DPRCSFrames.resize(Size);
 197       }
 198       DPRCSFrames[fi] = true;
 199     }
 200   }
 201
 202   void setCSRegisterIsSpilled(unsigned Reg) {
 203     SpilledCSRegs.set(Reg);
 204   }
 205
 206   bool isCSRegisterSpilled(unsigned Reg) {
 207     return SpilledCSRegs[Reg];
 208   }
 209
 210   const BitVector &getSpilledCSRegisters() const {
 211     return SpilledCSRegs;
 212   }
 213
 214   unsigned createJumpTableUId() {
 215     return JumpTableUId++;
 216   }
 217 };
 218 } // End llvm namespace
 219
 220 #endif // ARMMACHINEFUNCTIONINFO_H