https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102943
--- Comment #9 from Aldy Hernandez <aldyh at gcc dot gnu.org> --- (In reply to Richard Biener from comment #8) > The 'tree VRP threader' instances are now gone (well, obviously..). There's > now > > backwards jump threading : 15.98 ( 13%) > TOTAL : 120.33 > > backwards jump threading : 41.23 ( 33%) > TOTAL : 125.43 > > backwards jump threading : 89.97 ( 19%) > TOTAL : 473.55 > > in the three biggest LTRANS units (all others are <10s compile time). It > might > be that the VRP threading opportunities are now simply taken by backwards > threader instances. Correct. There's is no longer a post-VRP threader based on the forward threader. Now there's just one pre-VRP based on the backward threader. Thanks for re-confirming. I have hunted down a copy of SPEC2017 and will be looking at this today. If anyone has specific configury tricks/options for SPEC, please mail me privately, as it's been decades since I last ran SPEC.
