Parsing/AST support for Structured Exception Handling

Patch authored by Sohail Somani.

Provide parsing and AST support for Windows structured exception handling.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@130366 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGStmt.cpp b/lib/CodeGen/CGStmt.cpp
index 0acedef..99bc3f4 100644
--- a/lib/CodeGen/CGStmt.cpp
+++ b/lib/CodeGen/CGStmt.cpp
@@ -72,6 +72,8 @@
   switch (S->getStmtClass()) {
   case Stmt::NoStmtClass:
   case Stmt::CXXCatchStmtClass:
+  case Stmt::SEHExceptStmtClass:
+  case Stmt::SEHFinallyStmtClass:
     llvm_unreachable("invalid statement class to emit generically");
   case Stmt::NullStmtClass:
   case Stmt::CompoundStmtClass:
@@ -155,6 +157,8 @@
     break;
   case Stmt::CXXForRangeStmtClass:
     EmitCXXForRangeStmt(cast<CXXForRangeStmt>(*S));
+  case Stmt::SEHTryStmtClass:
+    // FIXME Not yet implemented
     break;
   }
 }