remove the dwarf sizing stuff which is now dead, it was

"yet another" copy of the dwarf EH emission code that was
copied, pasted and slightly hacked up.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109169 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 0 insertions, 456 deletions

diff --git a/lib/ExecutionEngine/JIT/JITDwarfEmitter.cpp b/lib/ExecutionEngine/JIT/JITDwarfEmitter.cpp
index 4b3ca8759b..1105bcc043 100644
--- a/lib/ExecutionEngine/JIT/JITDwarfEmitter.cpp
+++ b/lib/ExecutionEngine/JIT/JITDwarfEmitter.cpp
@@ -595,443 +595,3 @@ JITDwarfEmitter::EmitEHFrame(const Function* Personality,
   
   return StartEHPtr;
 }
-
-unsigned JITDwarfEmitter::GetDwarfTableSizeInBytes(MachineFunction& F,
-                                         JITCodeEmitter& jce,
-                                         unsigned char* StartFunction,
-                                         unsigned char* EndFunction) {
-  const TargetMachine& TM = F.getTarget();
-  TD = TM.getTargetData();
-  stackGrowthDirection = TM.getFrameInfo()->getStackGrowthDirection();
-  RI = TM.getRegisterInfo();
-  JCE = &jce;
-  unsigned FinalSize = 0;
-  
-  FinalSize += GetExceptionTableSizeInBytes(&F);
-      
-  const std::vector<const Function *> Personalities = MMI->getPersonalities();
-  FinalSize += 
-    GetCommonEHFrameSizeInBytes(Personalities[MMI->getPersonalityIndex()]);
-
-  FinalSize += GetEHFrameSizeInBytes(Personalities[MMI->getPersonalityIndex()],
-                                     StartFunction);
-
-  return FinalSize;
-}
-
-/// RoundUpToAlign - Add the specified alignment to FinalSize and returns
-/// the new value.
-static unsigned RoundUpToAlign(unsigned FinalSize, unsigned Alignment) {
-  if (Alignment == 0) Alignment = 1;
-  // Since we do not know where the buffer will be allocated, be pessimistic.
-  return FinalSize + Alignment;
-}
-  
-unsigned
-JITDwarfEmitter::GetEHFrameSizeInBytes(const Function* Personality,
-                                       unsigned char* StartFunction) const { 
-  unsigned PointerSize = TD->getPointerSize();
-  unsigned FinalSize = 0;
-  // EH frame header.
-  FinalSize += PointerSize;
-  // FDE CIE Offset
-  FinalSize += 3 * PointerSize;
-  // If there is a personality and landing pads then point to the language
-  // specific data area in the exception table.
-  if (Personality) {
-    FinalSize += MCAsmInfo::getULEB128Size(4); 
-    FinalSize += PointerSize;
-  } else {
-    FinalSize += MCAsmInfo::getULEB128Size(0);
-  }
-      
-  // Indicate locations of function specific  callee saved registers in
-  // frame.
-  FinalSize += GetFrameMovesSizeInBytes((intptr_t)StartFunction,
-                                        MMI->getFrameMoves());
-      
-  FinalSize = RoundUpToAlign(FinalSize, 4);
-  
-  // Double zeroes for the unwind runtime
-  FinalSize += 2 * PointerSize;
-
-  return FinalSize;
-}
-
-unsigned JITDwarfEmitter::GetCommonEHFrameSizeInBytes(const Function* Personality) 
-  const {
-
-  unsigned PointerSize = TD->getPointerSize();
-  int stackGrowth = stackGrowthDirection == TargetFrameInfo::StackGrowsUp ?
-          PointerSize : -PointerSize;
-  unsigned FinalSize = 0; 
-  // EH Common Frame header
-  FinalSize += PointerSize;
-  FinalSize += 4;
-  FinalSize += 1;
-  FinalSize += Personality ? 5 : 3; // "zPLR" or "zR"
-  FinalSize += MCAsmInfo::getULEB128Size(1);
-  FinalSize += MCAsmInfo::getSLEB128Size(stackGrowth);
-  FinalSize += 1;
-  
-  if (Personality) {
-    FinalSize += MCAsmInfo::getULEB128Size(7);
-    
-    // Encoding
-    FinalSize+= 1;
-    //Personality
-    FinalSize += PointerSize;
-    
-    FinalSize += MCAsmInfo::getULEB128Size(dwarf::DW_EH_PE_pcrel);
-    FinalSize += MCAsmInfo::getULEB128Size(dwarf::DW_EH_PE_pcrel);
-      
-  } else {
-    FinalSize += MCAsmInfo::getULEB128Size(1);
-    FinalSize += MCAsmInfo::getULEB128Size(dwarf::DW_EH_PE_pcrel);
-  }
-
-  std::vector<MachineMove> Moves;
-  RI->getInitialFrameState(Moves);
-  FinalSize += GetFrameMovesSizeInBytes(0, Moves);
-  FinalSize = RoundUpToAlign(FinalSize, 4);
-  return FinalSize;
-}
-
-unsigned
-JITDwarfEmitter::GetFrameMovesSizeInBytes(intptr_t BaseLabelPtr,
-                                  const std::vector<MachineMove> &Moves) const {
-  unsigned PointerSize = TD->getPointerSize();
-  int stackGrowth = stackGrowthDirection == TargetFrameInfo::StackGrowsUp ?
-          PointerSize : -PointerSize;
-  bool IsLocal = BaseLabelPtr;
-  unsigned FinalSize = 0; 
-
-  for (unsigned i = 0, N = Moves.size(); i < N; ++i) {
-    const MachineMove &Move = Moves[i];
-    MCSymbol *Label = Move.getLabel();
-    
-    // Throw out move if the label is invalid.
-    if (Label && (*JCE->getLabelLocations())[Label] == 0)
-      continue;
-    
-    intptr_t LabelPtr = 0;
-    if (Label) LabelPtr = JCE->getLabelAddress(Label);
-
-    const MachineLocation &Dst = Move.getDestination();
-    const MachineLocation &Src = Move.getSource();
-    
-    // Advance row if new location.
-    if (BaseLabelPtr && Label && (BaseLabelPtr != LabelPtr || !IsLocal)) {
-      FinalSize++;
-      FinalSize += PointerSize;
-      BaseLabelPtr = LabelPtr;
-      IsLocal = true;
-    }
-    
-    // If advancing cfa.
-    if (Dst.isReg() && Dst.getReg() == MachineLocation::VirtualFP) {
-      if (!Src.isReg()) {
-        if (Src.getReg() == MachineLocation::VirtualFP) {
-          ++FinalSize;
-        } else {
-          ++FinalSize;
-          unsigned RegNum = RI->getDwarfRegNum(Src.getReg(), true);
-          FinalSize += MCAsmInfo::getULEB128Size(RegNum);
-        }
-        
-        int Offset = -Src.getOffset();
-        
-        FinalSize += MCAsmInfo::getULEB128Size(Offset);
-      } else {
-        llvm_unreachable("Machine move no supported yet.");
-      }
-    } else if (Src.isReg() &&
-      Src.getReg() == MachineLocation::VirtualFP) {
-      if (Dst.isReg()) {
-        ++FinalSize;
-        unsigned RegNum = RI->getDwarfRegNum(Dst.getReg(), true);
-        FinalSize += MCAsmInfo::getULEB128Size(RegNum);
-      } else {
-        llvm_unreachable("Machine move no supported yet.");
-      }
-    } else {
-      unsigned Reg = RI->getDwarfRegNum(Src.getReg(), true);
-      int Offset = Dst.getOffset() / stackGrowth;
-      
-      if (Offset < 0) {
-        ++FinalSize;
-        FinalSize += MCAsmInfo::getULEB128Size(Reg);
-        FinalSize += MCAsmInfo::getSLEB128Size(Offset);
-      } else if (Reg < 64) {
-        ++FinalSize;
-        FinalSize += MCAsmInfo::getULEB128Size(Offset);
-      } else {
-        ++FinalSize;
-        FinalSize += MCAsmInfo::getULEB128Size(Reg);
-        FinalSize += MCAsmInfo::getULEB128Size(Offset);
-      }
-    }
-  }
-  return FinalSize;
-}
-
-unsigned 
-JITDwarfEmitter::GetExceptionTableSizeInBytes(MachineFunction* MF) const {
-  unsigned FinalSize = 0;
-
-  // Map all labels and get rid of any dead landing pads.
-  MMI->TidyLandingPads(JCE->getLabelLocations());
-
-  const std::vector<const GlobalVariable *> &TypeInfos = MMI->getTypeInfos();
-  const std::vector<unsigned> &FilterIds = MMI->getFilterIds();
-  const std::vector<LandingPadInfo> &PadInfos = MMI->getLandingPads();
-  if (PadInfos.empty()) return 0;
-
-  // Sort the landing pads in order of their type ids.  This is used to fold
-  // duplicate actions.
-  SmallVector<const LandingPadInfo *, 64> LandingPads;
-  LandingPads.reserve(PadInfos.size());
-  for (unsigned i = 0, N = PadInfos.size(); i != N; ++i)
-    LandingPads.push_back(&PadInfos[i]);
-  std::sort(LandingPads.begin(), LandingPads.end(), PadLT);
-
-  // Negative type ids index into FilterIds, positive type ids index into
-  // TypeInfos.  The value written for a positive type id is just the type
-  // id itself.  For a negative type id, however, the value written is the
-  // (negative) byte offset of the corresponding FilterIds entry.  The byte
-  // offset is usually equal to the type id, because the FilterIds entries
-  // are written using a variable width encoding which outputs one byte per
-  // entry as long as the value written is not too large, but can differ.
-  // This kind of complication does not occur for positive type ids because
-  // type infos are output using a fixed width encoding.
-  // FilterOffsets[i] holds the byte offset corresponding to FilterIds[i].
-  SmallVector<int, 16> FilterOffsets;
-  FilterOffsets.reserve(FilterIds.size());
-  int Offset = -1;
-  for(std::vector<unsigned>::const_iterator I = FilterIds.begin(),
-    E = FilterIds.end(); I != E; ++I) {
-    FilterOffsets.push_back(Offset);
-    Offset -= MCAsmInfo::getULEB128Size(*I);
-  }
-
-  // Compute the actions table and gather the first action index for each
-  // landing pad site.
-  SmallVector<ActionEntry, 32> Actions;
-  SmallVector<unsigned, 64> FirstActions;
-  FirstActions.reserve(LandingPads.size());
-
-  int FirstAction = 0;
-  unsigned SizeActions = 0;
-  for (unsigned i = 0, N = LandingPads.size(); i != N; ++i) {
-    const LandingPadInfo *LP = LandingPads[i];
-    const std::vector<int> &TypeIds = LP->TypeIds;
-    const unsigned NumShared = i ? SharedTypeIds(LP, LandingPads[i-1]) : 0;
-    unsigned SizeSiteActions = 0;
-
-    if (NumShared < TypeIds.size()) {
-      unsigned SizeAction = 0;
-      ActionEntry *PrevAction = 0;
-
-      if (NumShared) {
-        const unsigned SizePrevIds = LandingPads[i-1]->TypeIds.size();
-        assert(Actions.size());
-        PrevAction = &Actions.back();
-        SizeAction = MCAsmInfo::getSLEB128Size(PrevAction->NextAction) +
-          MCAsmInfo::getSLEB128Size(PrevAction->ValueForTypeID);
-        for (unsigned j = NumShared; j != SizePrevIds; ++j) {
-          SizeAction -= MCAsmInfo::getSLEB128Size(PrevAction->ValueForTypeID);
-          SizeAction += -PrevAction->NextAction;
-          PrevAction = PrevAction->Previous;
-        }
-      }
-
-      // Compute the actions.
-      for (unsigned I = NumShared, M = TypeIds.size(); I != M; ++I) {
-        int TypeID = TypeIds[I];
-        assert(-1-TypeID < (int)FilterOffsets.size() && "Unknown filter id!");
-        int ValueForTypeID = TypeID < 0 ? FilterOffsets[-1 - TypeID] : TypeID;
-        unsigned SizeTypeID = MCAsmInfo::getSLEB128Size(ValueForTypeID);
-
-        int NextAction = SizeAction ? -(SizeAction + SizeTypeID) : 0;
-        SizeAction = SizeTypeID + MCAsmInfo::getSLEB128Size(NextAction);
-        SizeSiteActions += SizeAction;
-
-        ActionEntry Action = {ValueForTypeID, NextAction, PrevAction};
-        Actions.push_back(Action);
-
-        PrevAction = &Actions.back();
-      }
-
-      // Record the first action of the landing pad site.
-      FirstAction = SizeActions + SizeSiteActions - SizeAction + 1;
-    } // else identical - re-use previous FirstAction
-
-    FirstActions.push_back(FirstAction);
-
-    // Compute this sites contribution to size.
-    SizeActions += SizeSiteActions;
-  }
-
-  // Compute the call-site table.  Entries must be ordered by address.
-  SmallVector<CallSiteEntry, 64> CallSites;
-
-  RangeMapType PadMap;
-  for (unsigned i = 0, N = LandingPads.size(); i != N; ++i) {
-    const LandingPadInfo *LandingPad = LandingPads[i];
-    for (unsigned j=0, E = LandingPad->BeginLabels.size(); j != E; ++j) {
-      MCSymbol *BeginLabel = LandingPad->BeginLabels[j];
-      assert(!PadMap.count(BeginLabel) && "Duplicate landing pad labels!");
-      PadRange P = { i, j };
-      PadMap[BeginLabel] = P;
-    }
-  }
-
-  bool MayThrow = false;
-  MCSymbol *LastLabel = 0;
-  for (MachineFunction::const_iterator I = MF->begin(), E = MF->end();
-        I != E; ++I) {
-    for (MachineBasicBlock::const_iterator MI = I->begin(), E = I->end();
-          MI != E; ++MI) {
-      if (!MI->isLabel()) {
-        MayThrow |= MI->getDesc().isCall();
-        continue;
-      }
-
-      MCSymbol *BeginLabel = MI->getOperand(0).getMCSymbol();
-      
-      if (BeginLabel == LastLabel)
-        MayThrow = false;
-
-      RangeMapType::iterator L = PadMap.find(BeginLabel);
-
-      if (L == PadMap.end())
-        continue;
-
-      PadRange P = L->second;
-      const LandingPadInfo *LandingPad = LandingPads[P.PadIndex];
-
-      assert(BeginLabel == LandingPad->BeginLabels[P.RangeIndex] &&
-              "Inconsistent landing pad map!");
-
-      // If some instruction between the previous try-range and this one may
-      // throw, create a call-site entry with no landing pad for the region
-      // between the try-ranges.
-      if (MayThrow) {
-        CallSiteEntry Site = {LastLabel, BeginLabel, 0, 0};
-        CallSites.push_back(Site);
-      }
-
-      LastLabel = LandingPad->EndLabels[P.RangeIndex];
-      CallSiteEntry Site = {BeginLabel, LastLabel,
-        LandingPad->LandingPadLabel, FirstActions[P.PadIndex]};
-
-      assert(Site.BeginLabel && Site.EndLabel && Site.PadLabel &&
-              "Invalid landing pad!");
-
-      // Try to merge with the previous call-site.
-      if (CallSites.size()) {
-        CallSiteEntry &Prev = CallSites.back();
-        if (Site.PadLabel == Prev.PadLabel && Site.Action == Prev.Action) {
-          // Extend the range of the previous entry.
-          Prev.EndLabel = Site.EndLabel;
-          continue;
-        }
-      }
-
-      // Otherwise, create a new call-site.
-      CallSites.push_back(Site);
-    }
-  }
-  // If some instruction between the previous try-range and the end of the
-  // function may throw, create a call-site entry with no landing pad for the
-  // region following the try-range.
-  if (MayThrow) {
-    CallSiteEntry Site = {LastLabel, 0, 0, 0};
-    CallSites.push_back(Site);
-  }
-
-  // Final tallies.
-  unsigned SizeSites = CallSites.size() * (sizeof(int32_t) + // Site start.
-                                            sizeof(int32_t) + // Site length.
-                                            sizeof(int32_t)); // Landing pad.
-  for (unsigned i = 0, e = CallSites.size(); i < e; ++i)
-    SizeSites += MCAsmInfo::getULEB128Size(CallSites[i].Action);
-
-  unsigned SizeTypes = TypeInfos.size() * TD->getPointerSize();
-
-  unsigned TypeOffset = sizeof(int8_t) + // Call site format
-                        // Call-site table length
-                        MCAsmInfo::getULEB128Size(SizeSites) + 
-                        SizeSites + SizeActions + SizeTypes;
-
-  unsigned TotalSize = sizeof(int8_t) + // LPStart format
-                       sizeof(int8_t) + // TType format
-                       MCAsmInfo::getULEB128Size(TypeOffset) + // TType base offset
-                       TypeOffset;
-
-  unsigned SizeAlign = (4 - TotalSize) & 3;
-
-  // Begin the exception table.
-  FinalSize = RoundUpToAlign(FinalSize, 4);
-  for (unsigned i = 0; i != SizeAlign; ++i) {
-    ++FinalSize;
-  }
-  
-  unsigned PointerSize = TD->getPointerSize();
-
-  // Emit the header.
-  ++FinalSize;
-  // Asm->EOL("LPStart format (DW_EH_PE_omit)");
-  ++FinalSize;
-  // Asm->EOL("TType format (DW_EH_PE_absptr)");
-  ++FinalSize;
-  // Asm->EOL("TType base offset");
-  ++FinalSize;
-  // Asm->EOL("Call site format (DW_EH_PE_udata4)");
-  ++FinalSize;
-  // Asm->EOL("Call-site table length");
-
-  // Emit the landing pad site information.
-  for (unsigned i = 0; i < CallSites.size(); ++i) {
-    CallSiteEntry &S = CallSites[i];
-
-    // Asm->EOL("Region start");
-    FinalSize += PointerSize;
-    
-    //Asm->EOL("Region length");
-    FinalSize += PointerSize;
-
-    // Asm->EOL("Landing pad");
-    FinalSize += PointerSize;
-
-    FinalSize += MCAsmInfo::getULEB128Size(S.Action);
-    // Asm->EOL("Action");
-  }
-
-  // Emit the actions.
-  for (unsigned I = 0, N = Actions.size(); I != N; ++I) {
-    ActionEntry &Action = Actions[I];
-
-    //Asm->EOL("TypeInfo index");
-    FinalSize += MCAsmInfo::getSLEB128Size(Action.ValueForTypeID);
-    //Asm->EOL("Next action");
-    FinalSize += MCAsmInfo::getSLEB128Size(Action.NextAction);
-  }
-
-  // Emit the type ids.
-  for (unsigned M = TypeInfos.size(); M; --M) {
-    // Asm->EOL("TypeInfo");
-    FinalSize += PointerSize;
-  }
-
-  // Emit the filter typeids.
-  for (unsigned j = 0, M = FilterIds.size(); j < M; ++j) {
-    unsigned TypeID = FilterIds[j];
-    FinalSize += MCAsmInfo::getULEB128Size(TypeID);
-    //Asm->EOL("Filter TypeInfo index");
-  }
-  
-  FinalSize = RoundUpToAlign(FinalSize, 4);
-
-  return FinalSize;
-}
diff --git a/lib/ExecutionEngine/JIT/JITDwarfEmitter.h b/lib/ExecutionEngine/JIT/JITDwarfEmitter.h
index e627550d6d..30956820f3 100644
--- a/lib/ExecutionEngine/JIT/JITDwarfEmitter.h
+++ b/lib/ExecutionEngine/JIT/JITDwarfEmitter.h
@@ -49,17 +49,6 @@ class JITDwarfEmitter {
                              unsigned char* EndFunction,
                              unsigned char* ExceptionTable) const;
     
-  unsigned GetExceptionTableSizeInBytes(MachineFunction* MF) const;
-  
-  unsigned
-    GetFrameMovesSizeInBytes(intptr_t BaseLabelPtr, 
-                             const std::vector<MachineMove> &Moves) const;
-    
-  unsigned GetCommonEHFrameSizeInBytes(const Function* Personality) const;
-
-  unsigned GetEHFrameSizeInBytes(const Function* Personality, 
-                                 unsigned char* StartFunction) const; 
-    
 public:
   
   JITDwarfEmitter(JIT& jit);
@@ -71,11 +60,6 @@ public:
                                 unsigned char* &EHFramePtr);
   
   
-  unsigned GetDwarfTableSizeInBytes(MachineFunction& F, 
-                                    JITCodeEmitter& JCE,
-                                    unsigned char* StartFunction,
-                                    unsigned char* EndFunction);
-
   void setModuleInfo(MachineModuleInfo* Info) {
     MMI = Info;
   }