Add -fcommon to a test-case to re-trigger it.

	* gcc.target/i386/pr91623.c: Add -fcommon in order
	to re-trigger the needed code for the test-case which
	was added in r10-2910-g9151048d.

gcc/testsuite/ChangeLog

+2020-03-04  Martin Liska  <mliska@suse.cz>
+
+	* gcc.target/i386/pr91623.c: Add -fcommon in order
+	to re-trigger the needed code for the test-case which
+	was added in r10-2910-g9151048d854e352a9b83b771c6711b8221c73f7e.
+
 2020-03-04  Jakub Jelinek  <jakub@redhat.com>
 
 	PR debug/93888

gcc/testsuite/gcc.target/i386/pr91623.c

 /* PR middle-end/91623 */
 /* { dg-do compile } */
-/* { dg-options "-O3 -msse4.1 -mno-sse4.2" } */
+/* { dg-options "-O3 -msse4.1 -mno-sse4.2 -fcommon" } */
 
 typedef long long V __attribute__((__vector_size__(16)));
 V e, h;