[PATCH] Fix the bug to check if lookup_stmt_eh_lp returns positive instead of non-zero

[Xinliang David Li]

Is it possible to add a test case?

David

On Mon, Jul 8, 2013 at 5:55 PM, Dehao Chen <dehao@google.com> wrote:
> In lookup_stmt_eh_lp, negative return value indicates a MUST_NOT_THROW
> region index. In this case, we should *not* add an EH edge during VPT.
>
> Bootstrapped and passed regression test.
>
> OK for trunk?
>
> Thanks,
> Dehao
>
> gcc/ChangeLog:
>
> 2013-07-08  Dehao Chen (dehao@google.com)
>
>         * value-prof.c (gimple_ic): Fix the bug of adding EH edge.
>
> Index: gcc/value-prof.c
> ===================================================================
> --- gcc/value-prof.c (revision 200375)
> +++ gcc/value-prof.c (working copy)
> @@ -1359,8 +1359,7 @@ gimple_ic (gimple icall_stmt, struct cgraph_node *
>
>    /* Build an EH edge for the direct call if necessary.  */
>    lp_nr = lookup_stmt_eh_lp (icall_stmt);
> -  if (lp_nr != 0
> -      && stmt_could_throw_p (dcall_stmt))
> +  if (lp_nr > 0 && stmt_could_throw_p (dcall_stmt))
>      {
>        edge e_eh, e;
>        edge_iterator ei;