Re: [Predicated Ins vs Branches] O3 and PGO result in 2x performance drop relative to O2

2023-07-31 Thread Richard Biener via Gcc-bugs
On Mon, Jul 31, 2023 at 2:57 PM Changbin Du via Gcc wrote: > > Hello, folks. > This is to discuss Gcc's heuristic strategy about Predicated Instructions and > Branches. And probably something needs to be improved. > > [The story] > Weeks ago, I built a huffman encoding program with O2, O3, and PGO

Re: PR 94454, ICE in template machinery

2020-04-14 Thread Richard Biener via Gcc-bugs
On Tue, Apr 14, 2020 at 7:36 PM Nathan Sidwell wrote: > > Richard, > I think 94454 is a P1. We have an inconsistency between specialization > hasher and equality. arguments may compare equal but hash differently. It doesn't seem to be a regression so bug priority has no meaning ;) But yeah, it