re PR tree-optimization/78148 (r241649 causes -fcompare-debug failure on ppc64le)

	PR target/78148
	* gimple-ssa-store-merging.c
	(imm_store_chain_info::output_merged_store): Use build_aligned_type
	instead of SET_TYPE_ALIGN on shared integral type.

	* gcc.dg/pr78148.c: New test.

From-SVN: r241679

gcc/ChangeLog

+2016-10-29  Jakub Jelinek  <jakub@redhat.com>
+
+	PR target/78148
+	* gimple-ssa-store-merging.c
+	(imm_store_chain_info::output_merged_store): Use build_aligned_type
+	instead of SET_TYPE_ALIGN on shared integral type.
+
 2016-10-29  John David Anglin  <danglin@gcc.gnu.org>
 
 	* config/pa/pa.h (BIGGEST_ALIGNMENT): Adjust comment.

gcc/gimple-ssa-store-merging.c

@@ -1130,7 +1130,7 @@ imm_store_chain_info::output_merged_store (tree base, merged_store_group *group)
       location_t loc = get_location_for_stmts (split_store->orig_stmts);
 
       tree int_type = build_nonstandard_integer_type (try_size, UNSIGNED);
-      SET_TYPE_ALIGN (int_type, align);
+      int_type = build_aligned_type (int_type, align);
       tree addr = build_fold_addr_expr (base);
       tree dest = fold_build2 (MEM_REF, int_type, addr,
 			       build_int_cst (offset_type, try_pos));

gcc/testsuite/ChangeLog

+2016-10-29  Jakub Jelinek  <jakub@redhat.com>
+
+	PR target/78148
+	* gcc.dg/pr78148.c: New test.
+
 2016-10-28  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* gcc.target/sparc/overflow-3.c: Replace and move old one to...

gcc/testsuite/gcc.dg/pr78148.c

+/* PR target/78148 */
+/* { dg-do compile } */
+/* { dg-options "-O2 -fcompare-debug" } */
+
+struct A { int a, b; };
+struct B { char c, d; };
+extern void bar (struct A, struct B);
+struct C { char e, f; } a;
+struct D
+{
+  int g;
+  struct C h[4];
+};
+struct D *e;
+
+struct D
+foo (void)
+{
+  int b;
+  struct B c;
+  struct A d;
+  d.b = c.c = c.d = 0;
+  bar (d, c);
+}
+
+void
+baz ()
+{
+  e->h[0].e = e->h[0].f = 0;
+  foo ();
+}