Hi Sam, We are currently migrating Turbofan to a new CFG-based IR (Turboshaft). This could help.
Cheers, Nico On Tue, Jul 25, 2023 at 10:23 AM Sam Parker-Haynes <sam.par...@arm.com> wrote: > Hi, > > I've been wondering how to go about adding general support for conditional > operations in Turbofan, specifically conditional compares for AArch64. But > I now see that Intel APX extensions also support more conditional > instructions, beyond cmov. > > I'm not a huge fan of flag continuations, as it's been too easy for me to > introduce bugs while using them, so is there a safer way to approach this? > > Machine-level predication would seem to require a CFG in a form that isn't > really available until during/after jump-threading. So a few questions > about jump threading: > - Could predication happen there? > - Why does jump threading run so late, why not before regalloc? > > And, in general, what is the policy on having optimisation passes that run > on machine code? > > Thanks, > Sam > > -- > -- > v8-dev mailing list > v8-dev@googlegroups.com > http://groups.google.com/group/v8-dev > --- > You received this message because you are subscribed to the Google Groups > "v8-dev" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to v8-dev+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/v8-dev/80169017-f248-4424-89ad-97260f28643dn%40googlegroups.com > <https://groups.google.com/d/msgid/v8-dev/80169017-f248-4424-89ad-97260f28643dn%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- Nico Hartmann | Software Engineer | nicohartm...@google.com | Chrome - V8 -- -- v8-dev mailing list v8-dev@googlegroups.com http://groups.google.com/group/v8-dev --- You received this message because you are subscribed to the Google Groups "v8-dev" group. To unsubscribe from this group and stop receiving emails from it, send an email to v8-dev+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/v8-dev/CAHNjccJX_abKTixLQL6jjLqiVuEmvtoygvxxp_-TzOVu2KXOog%40mail.gmail.com.
