re PR c/51628 (__attribute__((packed)) is unsafe in some cases (i.e. add…

re PR c/51628 (__attribute__((packed)) is unsafe in some cases (i.e. add -Waddress-of-packed-member, etc.))

	PR c/51628
	PR target/88682
	* c-c++-common/pr51628-10.c (unaligned_int128_t): Add
	may_alias attribute.

From-SVN: r267970

gcc/testsuite/ChangeLog

+2019-01-16  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c/51628
+	PR target/88682
+	* c-c++-common/pr51628-10.c (unaligned_int128_t): Add
+	may_alias attribute.
+
 2019-01-15  Nikhil Benesch  <nikhil.benesch@gmail.com>
 
         * gcc.misc-tests/godump-1.c: Add test case for typedef before

gcc/testsuite/c-c++-common/pr51628-10.c

@@ -11,7 +11,7 @@ struct pair_t
 typedef struct unaligned_int128_t_
 {
   __int128_t value;
-} __attribute__((packed)) unaligned_int128_t;
+} __attribute__((packed, may_alias)) unaligned_int128_t;
 
 struct pair_t p = {0, 1};
 unaligned_int128_t *addr = (unaligned_int128_t *) &p.i;