Add methods to parse the SEH directives to the COFFAsmParser. Implement some
of them, particularly the ones that don't take arguments. Also implement
.seh_proc and .seh_handler.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131866 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/MC/MCAsmStreamer.cpp b/lib/MC/MCAsmStreamer.cpp
index 9bd614a..1df5c07 100644
--- a/lib/MC/MCAsmStreamer.cpp
+++ b/lib/MC/MCAsmStreamer.cpp
@@ -208,7 +208,7 @@
   virtual void EmitCFIRelOffset(int64_t Register, int64_t Offset);
   virtual void EmitCFIAdjustCfaOffset(int64_t Adjustment);
 
-  virtual void EmitWin64EHStartProc(MCSymbol *Symbol);
+  virtual void EmitWin64EHStartProc(const MCSymbol *Symbol);
   virtual void EmitWin64EHEndProc();
   virtual void EmitWin64EHStartChained();
   virtual void EmitWin64EHEndChained();
@@ -930,7 +930,7 @@
   EmitEOL();
 }
 
-void MCAsmStreamer::EmitWin64EHStartProc(MCSymbol *Symbol) {
+void MCAsmStreamer::EmitWin64EHStartProc(const MCSymbol *Symbol) {
   MCStreamer::EmitWin64EHStartProc(Symbol);
 
   OS << ".seh_proc " << *Symbol;