On Tue, Nov 27, 2012 at 2:23 PM, Jakub Jelinek <ja...@redhat.com> wrote:
> Hi!
>
> This patch removes a bogus assertion (that predates introduction
> of STMT_VINFO_PATTERN_DEF_SEQ (and STMT_VINFO_PATTERN_DEF_STMT
> before that) in 4.7). stmt might be not just STMT_VINFO_RELATED_STMT
> of orig_stmt, bt also could be anywhere in STMT_VINFO_PATTERN_DEF_SEQ
> of it. We don't vectorize this anyway for multiple reasons (e.g.
> orig_code is TRUNC_DIV_EXPR which isn't handled reduction code,
> and even the pattern recognized stmts include MULT_HIGHPART_EXPR
> which isn't handled either).
>
> Bootstrapped/regtested on x86_64-linux and i686-linux, ok for trunk?
Ok.
Thanks,
Richard.
> 2012-11-27 Jakub Jelinek <ja...@redhat.com>
>
> PR tree-optimization/55110
> * tree-vect-loop.c (vectorizable_reduction): Don't assert
> that STMT_VINFO_RELATED_STMT of orig_stmt is stmt.
>
> * gcc.dg/pr55110.c: New test.
>
> --- gcc/tree-vect-loop.c.jj 2012-11-21 16:00:12.000000000 +0100
> +++ gcc/tree-vect-loop.c 2012-11-26 11:24:42.903995009 +0100
> @@ -4624,7 +4624,6 @@ vectorizable_reduction (gimple stmt, gim
> if (orig_stmt)
> {
> orig_stmt_info = vinfo_for_stmt (orig_stmt);
> - gcc_assert (STMT_VINFO_RELATED_STMT (orig_stmt_info) == stmt);
> gcc_assert (STMT_VINFO_IN_PATTERN_P (orig_stmt_info));
> gcc_assert (!STMT_VINFO_IN_PATTERN_P (stmt_info));
> }
> --- gcc/testsuite/gcc.dg/pr55110.c.jj 2012-11-26 11:31:32.008587313 +0100
> +++ gcc/testsuite/gcc.dg/pr55110.c 2012-11-26 11:31:09.000000000 +0100
> @@ -0,0 +1,13 @@
> +/* PR tree-optimization/55110 */
> +/* { dg-do compile } */
> +/* { dg-options "-O1 -ftree-vectorize" } */
> +
> +int
> +foo (int x)
> +{
> + int a, b;
> + for (b = 0; b < 8; b++)
> + for (a = 0; a < 2; a++)
> + x /= 3;
> + return x;
> +}
>
> Jakub
