On Thu, 18 Jan 2024, Jakub Jelinek wrote:
> Hi!
>
> From what I can see, this test has been written for a backend fix and
> assumes the loop isn't vectorized (at least, it wasn't when the test was
> added, it contains an early exit), but that is no longer true and because
> of the vectorization it now contains an instruction which the test scans
> for not being present.
>
> I think we should just disable vectorization here.
>
> Regtested on x86_64-linux and i686-linux, ok for trunk?
OK
> 2024-01-18 Jakub Jelinek <ja...@redhat.com>
>
> PR testsuite/113452
> * gcc.target/i386/sse4_1-stv-1.c: Add -fno-tree-vectorize to
> dg-options.
>
> --- gcc/testsuite/gcc.target/i386/sse4_1-stv-1.c.jj 2022-05-31
> 11:33:51.603250042 +0200
> +++ gcc/testsuite/gcc.target/i386/sse4_1-stv-1.c 2024-01-17
> 17:46:21.999689350 +0100
> @@ -1,5 +1,5 @@
> /* { dg-do compile { target ia32 } } */
> -/* { dg-options "-O2 -msse4.1 -mstv -mno-stackrealign" } */
> +/* { dg-options "-O2 -msse4.1 -mstv -mno-stackrealign -fno-tree-vectorize" }
> */
> long long a[1024];
> long long b[1024];
>
>
> Jakub
