Revert: Emit personality function and Dwarf EH data for Win64 SEH.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185788 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/AsmPrinter/Win64Exception.cpp

@@ -78,9 +78,9 @@ void Win64Exception::BeginFunction(const MachineFunction *MF) {
   if (!shouldEmitPersonality)
     return;
 
-  const MCSymbol *PersHandlerSym = TLOF.getCFIPersonalitySymbol(Per, Asm->Mang,
-                                                                MMI);
-  Asm->OutStreamer.EmitWin64EHHandler(PersHandlerSym, true, true);
+  MCSymbol *GCCHandlerSym =
+    Asm->GetExternalSymbolSymbol("_GCC_specific_handler");
+  Asm->OutStreamer.EmitWin64EHHandler(GCCHandlerSym, true, true);
 
   Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("eh_func_begin",
                                                 Asm->getFunctionNumber()));
@@ -99,8 +99,14 @@ void Win64Exception::EndFunction() {
   MMI->TidyLandingPads();
 
   if (shouldEmitPersonality) {
+    const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering();
+    const Function *Per = MMI->getPersonalities()[MMI->getPersonalityIndex()];
+    const MCSymbol *Sym = TLOF.getCFIPersonalitySymbol(Per, Asm->Mang, MMI);
+
     Asm->OutStreamer.PushSection();
     Asm->OutStreamer.EmitWin64EHHandlerData();
+    Asm->OutStreamer.EmitValue(MCSymbolRefExpr::Create(Sym, Asm->OutContext),
+                               4);
     EmitExceptionTable();
     Asm->OutStreamer.PopSection();
   }

lib/MC/MCObjectFileInfo.cpp

@@ -547,16 +547,11 @@ void MCObjectFileInfo::InitCOFFMCObjectFileInfo(Triple T) {
   // though it contains relocatable pointers.  In PIC mode, this is probably a
   // big runtime hit for C++ apps.  Either the contents of the LSDA need to be
   // adjusted or this should be a data section.
-  if (T.getOS() == Triple::Win32) {
-    // On Windows with SEH, the LSDA is emitted into the .xdata section
-    LSDASection = 0;
-  } else {
-    LSDASection =
-      Ctx->getCOFFSection(".gcc_except_table",
-                          COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
-                          COFF::IMAGE_SCN_MEM_READ,
-                          SectionKind::getReadOnly());
-  }
+  LSDASection =
+    Ctx->getCOFFSection(".gcc_except_table",
+                        COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
+                        COFF::IMAGE_SCN_MEM_READ,
+                        SectionKind::getReadOnly());
 
   // Debug info.
   DwarfAbbrevSection =