Fix PR1895: a crash on an ugly gcc extension.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@45505 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/exprs.c b/test/CodeGen/exprs.c
new file mode 100644
index 0000000..c57817d
--- /dev/null
+++ b/test/CodeGen/exprs.c
@@ -0,0 +1,8 @@
+// RUN: clang %s -emit-llvm
+
+// PR1895
+// sizeof function
+int zxcv(void);
+int x=sizeof(zxcv);
+int y=__alignof__(zxcv);
+