On Sat, Oct 29, 2016 at 10:07:22AM +0200, Andreas Schwab wrote:
> That breaks Ada:
>
> a-teioed.adb: In function 'Ada.Text_Io.Editing.Format_Number':
> a-teioed.adb:127:4: error: alignment of array elements is greater than
> element size
> a-teioed.adb:127:4: error: alignment of array elements is greater than
> element size
> a-teioed.adb:127:4: error: alignment of array elements is greater than
> element size
> a-teioed.adb:127:4: error: alignment of array elements is greater than
> element size
> a-teioed.adb:127:4: error: alignment of array elements is greater than
> element size
> a-teioed.adb:127:4: error: alignment of array elements is greater than
> element size
> a-teioed.adb:127:4: error: alignment of array elements is greater than
> element size
> a-teioed.adb:127:4: error: alignment of array elements is greater than
> element size
> a-teioed.adb:127:4: error: alignment of array elements is greater than
> element size
> a-teioed.adb: In function 'Ada.Text_Io.Editing.To_Picture':
> a-teioed.adb:2724:4: error: alignment of array elements is greater than
> element size
> a-teioed.adb: In function 'Ada.Text_Io.Editing.Valid':
> a-teioed.adb:2751:4: error: alignment of array elements is greater than
> element size
The bug is the same why PR78148 testcase fails with -fcompare-debug,
build_nonstandard_integer_type return values are shared, all such calls
with the same arguments return the same types, so using SET_TYPE_ALIGN on it
is wrong.
As it is a bootstrap failure on primary target and the fix is obvious,
I've committed it to trunk after bootstrapping/regtesting it on x86_64-linux
(where it fixed ada bootstrap) and i686-linux.
2016-10-29 Jakub Jelinek <ja...@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.
* gcc.dg/pr78148.c: New test.
--- gcc/gimple-ssa-store-merging.c.jj 2016-10-29 14:39:24.000000000 +0200
+++ gcc/gimple-ssa-store-merging.c 2016-10-29 15:09:34.650749175 +0200
@@ -1130,7 +1130,7 @@ imm_store_chain_info::output_merged_stor
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/gcc.dg/pr78148.c.jj 2016-10-29 15:10:05.432358626 +0200
+++ gcc/testsuite/gcc.dg/pr78148.c 2016-10-29 15:09:09.000000000 +0200
@@ -0,0 +1,31 @@
+/* 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 ();
+}
Jakub
