[PATCH] Add missing check for gassign.

[Richard Biener]

On Thu, Jun 18, 2020 at 9:42 AM Martin Liška <mliska@suse.cz> wrote:
>
> Hi.
>
> We should check for gassign before doing gimple_assign_rhs_code and friends.
>
> Ready to be installed after proper testing?

OK.

> Thanks,
> Martin
>
> gcc/ChangeLog:
>
>         * tree-vect-generic.c (expand_vector_condition): Check
>         for gassign before inspecting RHS.
> ---
>   gcc/tree-vect-generic.c | 5 +++--
>   1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/gcc/tree-vect-generic.c b/gcc/tree-vect-generic.c
> index fb955bbf3d2..83d399a7898 100644
> --- a/gcc/tree-vect-generic.c
> +++ b/gcc/tree-vect-generic.c
> @@ -957,8 +957,9 @@ expand_vector_condition (gimple_stmt_iterator *gsi)
>
>     if (code == SSA_NAME)
>       {
> -      gimple *assign = SSA_NAME_DEF_STMT (a);
> -      if (TREE_CODE_CLASS (gimple_assign_rhs_code (assign)) == tcc_comparison)
> +      gassign *assign = dyn_cast<gassign *> (SSA_NAME_DEF_STMT (a));
> +      if (assign != NULL
> +         && TREE_CODE_CLASS (gimple_assign_rhs_code (assign)) == tcc_comparison)
>         {
>           a_is_comparison = true;
>           a1 = gimple_assign_rhs1 (assign);
> --
> 2.27.0
>