--- Reverse-merging r82282 into '.':

U    lib/CodeGen/AsmPrinter/DwarfException.cpp
U    lib/CodeGen/AsmPrinter/DwarfException.h

--- Reverse-merging r82274 into '.':
U    lib/Target/TargetLoweringObjectFile.cpp
G    lib/CodeGen/AsmPrinter/DwarfException.cpp

These revisions were breaking everything.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82396 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/AsmPrinter/DwarfException.cpp

@@ -74,25 +74,6 @@ unsigned DwarfException::SizeOfEncodedValue(unsigned Encoding) {
   return 0;
 }
 
-/// CreateLabelDiff - Emit a label and subtract it from the expression we
-/// already have.  This is equivalent to emitting "foo - .", but we have to emit
-/// the label for "." directly.
-const MCExpr *DwarfException::CreateLabelDiff(const MCExpr *ExprRef,
-                                              const char *LabelName,
-                                              unsigned Index) {
-  SmallString<64> Name;
-  raw_svector_ostream(Name) << MAI->getPrivateGlobalPrefix()
-                            << LabelName << Asm->getFunctionNumber()
-                            << "_" << Index;
-  MCSymbol *DotSym = Asm->OutContext.GetOrCreateSymbol(Name.str());
-  Asm->OutStreamer.EmitLabel(DotSym);
-
-  return MCBinaryExpr::CreateSub(ExprRef,
-                                 MCSymbolRefExpr::Create(DotSym,
-                                                         Asm->OutContext),
-                                 Asm->OutContext);
-}
-
 /// EmitCIE - Emit a Common Information Entry (CIE). This holds information that
 /// is shared among many Frame Description Entries.  There is at least one CIE
 /// in every non-empty .debug_frame section.
@@ -195,9 +176,23 @@ void DwarfException::EmitCIE(const Function *PersonalityFn, unsigned Index) {
 
   // If there is a personality, we need to indicate the function's location.
   if (PersonalityRef) {
-    if (!IsPersonalityPCRel)
-      PersonalityRef = CreateLabelDiff(PersonalityRef, "personalityref_addr",
-                                       Index);
+    // If the reference to the personality function symbol is not already
+    // pc-relative, then we need to subtract our current address from it.  Do
+    // this by emitting a label and subtracting it from the expression we
+    // already have.  This is equivalent to emitting "foo - .", but we have to
+    // emit the label for "." directly.
+    if (!IsPersonalityPCRel) {
+      SmallString<64> Name;
+      raw_svector_ostream(Name) << MAI->getPrivateGlobalPrefix()
+         << "personalityref_addr" << Asm->getFunctionNumber() << "_" << Index;
+      MCSymbol *DotSym = Asm->OutContext.GetOrCreateSymbol(Name.str());
+      Asm->OutStreamer.EmitLabel(DotSym);
+      
+      PersonalityRef =  
+        MCBinaryExpr::CreateSub(PersonalityRef,
+                                MCSymbolRefExpr::Create(DotSym,Asm->OutContext),
+                                Asm->OutContext);
+    }
     
     O << MAI->getData32bitsDirective();
     PersonalityRef->print(O, MAI);
@@ -898,34 +893,14 @@ void DwarfException::EmitExceptionTable() {
   // of the catch clauses as they appear in the source code, and must be kept in
   // the same order. As a result, changing the order of the catch clause would
   // change the semantics of the program.
-  const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering();
-  unsigned Index = 1;
-
   for (std::vector<GlobalVariable *>::const_reverse_iterator
-         I = TypeInfos.rbegin(), E = TypeInfos.rend(); I != E; ++I, ++Index) {
-    const GlobalVariable *TI = *I;
-
-    if (TI) {
-      if (TTypeFormat == dwarf::DW_EH_PE_absptr ||
-          TI->getLinkage() == GlobalValue::InternalLinkage) {
-        // Print out the unadorned name of the type info.
+         I = TypeInfos.rbegin(), E = TypeInfos.rend(); I != E; ++I) {
+    const GlobalVariable *GV = *I;
     PrintRelDirective();
-        O << Asm->Mang->getMangledName(TI);
-      } else {
-        bool IsTypeInfoIndirect = false, IsTypeInfoPCRel = false;
-        const MCExpr *TypeInfoRef =
-          TLOF.getSymbolForDwarfGlobalReference(TI, Asm->Mang, Asm->MMI,
-                                                IsTypeInfoIndirect,
-                                                IsTypeInfoPCRel);
 
-        if (!IsTypeInfoPCRel)
-          TypeInfoRef = CreateLabelDiff(TypeInfoRef, "typeinforef_addr", Index);
-
-        O << MAI->getData32bitsDirective();
-        TypeInfoRef->print(O, MAI);
-      }
+    if (GV) {
+      O << Asm->Mang->getMangledName(GV);
     } else {
-      PrintRelDirective();
       O << "0x0";
     }
 

lib/CodeGen/AsmPrinter/DwarfException.h

@@ -25,7 +25,6 @@ namespace llvm {
 struct LandingPadInfo;
 class MachineModuleInfo;
 class MCAsmInfo;
-class MCExpr;
 class Timer;
 class raw_ostream;
 
@@ -169,11 +168,6 @@ class VISIBILITY_HIDDEN DwarfException : public Dwarf {
                             const SmallVectorImpl<unsigned> &FirstActions);
   void EmitExceptionTable();
 
-  /// CreateLabelDiff - Emit a label and subtract it from the expression we
-  /// already have.  This is equivalent to emitting "foo - .", but we have to
-  /// emit the label for "." directly.
-  const MCExpr *CreateLabelDiff(const MCExpr *ExprRef, const char *LabelName,
-                                unsigned Index);
 public:
   //===--------------------------------------------------------------------===//
   // Main entry points.

lib/Target/TargetLoweringObjectFile.cpp

@@ -782,13 +782,8 @@ void TargetLoweringObjectFileMachO::Initialize(MCContext &Ctx,
   }
 
   // Exception Handling.
-#if 0
-  LSDASection = getMachOSection("__TEXT", "__gcc_except_tab", 0,
-                                SectionKind::getReadOnly());
-#else
   LSDASection = getMachOSection("__DATA", "__gcc_except_tab", 0,
                                 SectionKind::getDataRel());
-#endif
   EHFrameSection =
     getMachOSection("__TEXT", "__eh_frame",
                     MCSectionMachO::S_COALESCED |