[gcc r12-3959] testsuite/102517 - fix FAIL of gcc.dg/pr78408-1.c with OImode availability

[Richard Biener <rguenth@gcc.gnu.org>]

https://gcc.gnu.org/g:b34fa88becb6367229074f25ef9e2de6f4594b58

commit r12-3959-gb34fa88becb6367229074f25ef9e2de6f4594b58
Author: Richard Biener <rguenther@suse.de>
Date:   Wed Sep 29 14:32:32 2021 +0200

    testsuite/102517 - fix FAIL of gcc.dg/pr78408-1.c with OImode availability
    
    This fixes the testcase which looks for variants of memcpy after
    memset folding which is disturbed when we expand the memcpy inline
    earlier which in fact performs the desired optimization but makes
    the dump file not match.  For the ease of testing the following
    adjusts the smaller structure size to be no longer power-of-two
    which avoids the inline expansion.
    
    2021-09-29  Richard Biener  <rguenther@suse.de>
    
            PR testsuite/102517
            * gcc.dg/pr78408-1.c: Make S not power-of-two size.

Diff:
---
 gcc/testsuite/gcc.dg/pr78408-1.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/testsuite/gcc.dg/pr78408-1.c b/gcc/testsuite/gcc.dg/pr78408-1.c
index 94e2090b374..dc9870ac6af 100644
--- a/gcc/testsuite/gcc.dg/pr78408-1.c
+++ b/gcc/testsuite/gcc.dg/pr78408-1.c
@@ -3,7 +3,7 @@
 /* { dg-options "-O2 -fdump-tree-fab1-details" } */
 /* { dg-final { scan-tree-dump-times "after previous" 17 "fab1" } } */
 
-struct S { char a[32]; };
+struct S { char a[33]; };
 struct T { char a[65536]; };
 void bar (int, struct S *, struct S *, struct T *, struct T *);
 void baz (char *, char *);