https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105253
--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Ah, I see, expression_expensive_p is called, but number_of_iterations_popcount when creating a CALL_EXPR only cares about TYPE_PRECISION and happily creates __builtin_popcountl with unsigned long long argument because it has the same precision. tree_builtin_call_types_compatible_p says it is not valid builtin call and so we don't consider it expensive. Either we make number_of_iterations_popcount more accurate on the types, or better in tree_builtin_call_types_compatible_p use something like: bool in_gimple_form = (cfun && (cfun->curr_properties & PROP_gimple)) != 0; and if in_gimple_form, use useless_type_conversion_p instead of the TYPE_MAIN_VARIANT / tree_nop_conversion_p checks. That is my strong preference... What do you think?
