> Hi,
>
> this patch fixes lto PR70187, a 6 regression.
>
> We run into an ICE in in possible_polymorphic_call_targets when
> accessing nodes[0]->decl because nodes == vNULL:
> ...
> if (!outer_type->all_derivations_known)
> {
> if (!speculative && final_warning_records
> && TREE_CODE (TREE_TYPE (nodes[0]->decl)) == METHOD_TYPE)
> {
> if (complete
> && nodes.length () == 1
> && warn_suggest_final_types
> && !outer_type->derived_types.length ())
> {
> ...
>
> The patch fixes this by moving the 'nodes.length () == 1' test to
> before the use of nodes[0].
>
> Bootstrapped and reg-tested on x86_64.
>
> OK for stage4 trunk?
>
> Thanks,
> - Tom
> Safely use nodes[0] in possible_polymorphic_call_targets
>
> 2016-03-16 Tom de Vries <[email protected]>
>
> PR lto/70187
> * ipa-devirt.c (possible_polymorphic_call_targets): Move
> nodes.length () == 1 test to before first nodes[0] access.
OK,
thanks
Honza
