On Wed, Feb 25, 2015 at 2:10 PM, Kai Tietz <ktiet...@googlemail.com> wrote:
> Hello,
>
> So, I did full regression-test for following patch:
>
> ChangeLog
>
> 2015-02-25 Richard Biener <rguent...@suse.de>
> Kai Tietz <kti...@redhat.com>
>
> PR tree-optimization/61917
> * tree-vect-loop.c (vectorizable_reduction): Allow
> vect_internal_def without reduction to exit graceful.
>
> ChagneLog testsuite/
>
> 2015-02-25 Kai Tietz <kti...@redhat.com>
>
> PR tree-optimization/61917
> * gcc.dg/vect/vect-pr61917.c: New file.
>
> Tested for x86_64-unkown-linux. Ok for apply?
Ok.
Thanks,
Richard.
> Regards,
> Kai
>
> Index: tree-vect-loop.c
> ===================================================================
> --- tree-vect-loop.c (Revision 220958)
> +++ tree-vect-loop.c (Arbeitskopie)
> @@ -4981,6 +4981,12 @@ vectorizable_reduction (gimple stmt, gimple_stmt_i
> if (!vectype_in)
> vectype_in = tem;
> gcc_assert (is_simple_use);
> + if (!found_nested_cycle_def)
> + reduc_def_stmt = def_stmt;
> +
> + if (gimple_code (reduc_def_stmt) != GIMPLE_PHI)
> + return false;
> +
> if (!(dt == vect_reduction_def
> || dt == vect_nested_cycle
> || ((dt == vect_internal_def || dt == vect_external_def
> @@ -4993,10 +4999,7 @@ vectorizable_reduction (gimple stmt, gimple_stmt_i
> gcc_assert (orig_stmt);
> return false;
> }
> - if (!found_nested_cycle_def)
> - reduc_def_stmt = def_stmt;
>
> - gcc_assert (gimple_code (reduc_def_stmt) == GIMPLE_PHI);
> if (orig_stmt)
> gcc_assert (orig_stmt == vect_is_simple_reduction (loop_vinfo,
> reduc_def_stmt,
> Index: gcc/gcc/testsuite/gcc.dg/vect/vect-pr61917.c
> ===================================================================
> --- /dev/null
> +++ gcc/gcc/testsuite/gcc.dg/vect/vect-pr61917.c
> @@ -0,0 +1,13 @@
> +/* { dg-do compile } */
> +/* { dg-additional-options "-O3" } */
> +
> +int a, b, c, d;
> +
> +int
> +fn1 ()
> +{
> + for (; c; c++)
> + for (b = 0; b < 2; b++)
> + d = a - d;
> + return d;
> +}
