[gcc(refs/users/aoliva/heads/testme)] use -mno-strict-align for strlenopt-80.c on powerpc

[Alexandre Oliva]

https://gcc.gnu.org/g:5c52be2a4aaa850c8e00498846ce9354d4faf7a0

commit 5c52be2a4aaa850c8e00498846ce9354d4faf7a0
Author: Alexandre Oliva <oliva@adacore.com>
Date:   Tue Mar 9 18:42:54 2021 -0300

    use -mno-strict-align for strlenopt-80.c on powerpc
    
    ppc configurations that have -mstrict-align enabled by default fail
    gcc.dg/strlenopt-80.c, because some memcpy calls don't get turned into
    MEM_REFs, which defeats the tested-for strlen optimization.
    
    
    for  gcc/testsuite/ChangeLog
    
            * gcc.dg/strlenopt-80.c: Add -mno-strict-align on ppc.

Diff:
---
 gcc/testsuite/gcc.dg/strlenopt-80.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/gcc/testsuite/gcc.dg/strlenopt-80.c b/gcc/testsuite/gcc.dg/strlenopt-80.c
index 9124fe4740a..9978f5cf3bc 100644
--- a/gcc/testsuite/gcc.dg/strlenopt-80.c
+++ b/gcc/testsuite/gcc.dg/strlenopt-80.c
@@ -5,7 +5,11 @@
    such a store.
    { dg-do compile { target aarch64*-*-* i?86-*-* powerpc*-*-* x86_64-*-* } }
 
-   { dg-options "-O2 -Wall -fdump-tree-optimized" } */
+   { dg-options "-O2 -Wall -fdump-tree-optimized" }
+
+   On powerpc configurations that have -mstrict-align by default,
+   the memcpy calls for ncpylog >= 3 are not turned into MEM_REFs.
+   { dg-additional-options "-mno-strict-align" { target powerpc*-*-* } }  */
 
 #define CHAR_BIT      __CHAR_BIT__
 #define SIZE_MAX      __SIZE_MAX__