Implement function-try-blocks. However, there's a very subtle bug that I can't track down.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@70155 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CodeGenFunction.cpp b/lib/CodeGen/CodeGenFunction.cpp
index c05ead5..c74f834 100644
--- a/lib/CodeGen/CodeGenFunction.cpp
+++ b/lib/CodeGen/CodeGenFunction.cpp
@@ -225,12 +225,13 @@
                                     FProto->getArgType(i)));
   }
 
-  const CompoundStmt *S = FD->getBody(getContext());
+  // FIXME: Support CXXTryStmt here, too.
+  if (const CompoundStmt *S = FD->getCompoundBody(getContext())) {
+    StartFunction(FD, FD->getResultType(), Fn, Args, S->getLBracLoc());
+    EmitStmt(S);
+    FinishFunction(S->getRBracLoc());
+  }
 
-  StartFunction(FD, FD->getResultType(), Fn, Args, S->getLBracLoc());
-  EmitStmt(S);
-  FinishFunction(S->getRBracLoc());
-    
   // Destroy the 'this' declaration.
   if (CXXThisDecl)
     CXXThisDecl->Destroy(getContext());