PR31978: Don't crash if CodeGen sees a top-level BindingDecl.

llvm-svn: 345362

clang/lib/CodeGen/CodeGenModule.cpp

@@ -4800,6 +4800,7 @@ void CodeGenModule::EmitTopLevelDecl(Decl *D) {
   case Decl::TypeAliasTemplate:
   case Decl::Block:
   case Decl::Empty:
+  case Decl::Binding:
     break;
   case Decl::Using:          // using X; [C++]
     if (CGDebugInfo *DI = getModuleDebugInfo())

clang/test/Parser/cxx1z-decomposition.cpp

@@ -1,4 +1,5 @@
 // RUN: %clang_cc1 -std=c++1z %s -verify -fcxx-exceptions
+// RUN: not %clang_cc1 -std=c++1z %s -emit-llvm-only -fcxx-exceptions
 
 struct S { int a, b, c; };