[PATCH][X86_64/MC] Towards usable Win64 exception handling

[Werner]

>
Hello Kai,

great stuff! I'm just searching for that :-) 
See: http://llvm.org/bugs/show_bug.cgi?id=15393

But I'm slightly confused!?
You worte: 
>After finding yet another issue I realized that the patch was getting 
>far too big. Therefore I splitted the patch into 4 parts.

I found 4 parts:
[PATCH 1/5] Fix failing test seh.s
[PATCH 2/5] Generate IMAGE_REL_AMD64_ADDR32NB relocations for SEH
[PATCH 3/5] Fix alignment of unwind data.
[PATCH 4/5] Emit personality function and Dwarf EH data for Win64

But the "5th"? 

Up to now I'm missing in "X86MCAsmInfo.cpp" the added line(s): 
 X86MCAsmInfoMicrosoft::X86MCAsmInfoMicrosoft(const Triple &Triple) {
   if (Triple.getArch() == Triple::x86_64) {
     GlobalPrefix = "";
     PrivateGlobalPrefix = ".L";
   } 

   AssemblerDialect = AsmWriterFlavor;

   TextAlignFillValue = 0x90;
+
+  // Exceptions handling
+  ExceptionsType = ExceptionHandling::Win64;
 }

up soon
-Werner