On 29/10/2024 13:45, Richard Biener wrote: > On Tue, 29 Oct 2024, Richard Biener wrote: > > > On Mon, 28 Oct 2024, Alex Coplan wrote: > > > > > Currently we only cost gconds for the vector loop while we omit costing > > > them when analyzing the scalar loop; this unfairly penalizes the vector > > > loop in the case of loops with early exits. > > > > > > This (together with the previous patches) enables us to vectorize > > > std::find with 64-bit element sizes. > > > > OK. > > Ah, wait - but we're now costing the scalar IV gcond but we're not > costing the vector (scalar) IV gcond. So you want to exempt the > main IV gcond here.
Hmm, don't we already ignore the main IV since it should be !STMT_VINFO_RELEVANT_P? Sorry for the slow reply. Alex > > Richard. > > > Thanks, > > Richard. > > > > > gcc/ChangeLog: > > > > > > * tree-vect-loop.cc (vect_compute_single_scalar_iteration_cost): > > > Don't skip over gconds. > > > --- > > > gcc/tree-vect-loop.cc | 4 +++- > > > 1 file changed, 3 insertions(+), 1 deletion(-) > > > > > > > > > > > > -- > Richard Biener <rguent...@suse.de> > SUSE Software Solutions Germany GmbH, > Frankenstrasse 146, 90461 Nuernberg, Germany; > GF: Ivo Totev, Andrew McDonald, Werner Knoblich; (HRB 36809, AG Nuernberg)
