re PR middle-end/90025 (botan2 miscompilation on s390x-linux since r268957)

	PR middle-end/90025
	* expr.c (store_expr): Set properly size on the MEM passed to
	clear_storage.

	* gcc.c-torture/execute/pr90025.c: New test.

From-SVN: r270247

gcc/ChangeLog

 2019-04-10  Jakub Jelinek  <jakub@redhat.com>
 
+	PR middle-end/90025
+	* expr.c (store_expr): Set properly size on the MEM passed to
+	clear_storage.
+
 	PR c++/90010
 	* gimple-ssa-sprintf.c (target_to_host): Fix handling of targstr
 	with strlen in between hostsz-3 and hostsz-1 inclusive when no

gcc/expr.c

@@ -5658,7 +5658,8 @@ store_expr (tree exp, rtx target, int call_param_p,
       dest_mem = store_by_pieces (target, str_copy_len, string_cst_read_str,
 				  (void *) str, MEM_ALIGN (target), false,
 				  RETURN_END);
-      clear_storage (adjust_address (dest_mem, BLKmode, 0),
+      clear_storage (adjust_address_1 (dest_mem, BLKmode, 0, 1, 1, 0,
+				       exp_len - str_copy_len),
 		     GEN_INT (exp_len - str_copy_len), BLOCK_OP_NORMAL);
       return NULL_RTX;
     }

gcc/testsuite/ChangeLog

 2019-04-10  Jakub Jelinek  <jakub@redhat.com>
 
+	PR middle-end/90025
+	* gcc.c-torture/execute/pr90025.c: New test.
+
 	PR c++/90010
 	* gcc.dg/pr90010.c: New test.
 

gcc/testsuite/gcc.c-torture/execute/pr90025.c

+/* PR middle-end/90025 */
+
+__attribute__((noipa)) void
+bar (char *p)
+{
+  int i;
+  for (i = 0; i < 6; i++)
+    if (p[i] != "foobar"[i])
+      __builtin_abort ();
+  for (; i < 32; i++)
+    if (p[i] != '\0')
+      __builtin_abort ();
+}
+
+__attribute__((noipa)) void
+foo (unsigned int x)
+{
+  char s[32] = { 'f', 'o', 'o', 'b', 'a', 'r', 0 };
+  ((unsigned int *) s)[2] = __builtin_bswap32 (x);
+  bar (s);
+}
+
+int
+main ()
+{
+  foo (0);
+  return 0;
+}