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Re: Speedup extract_insn
> Jan Hubicka <jh@suse.cz> writes:
>
> > Hi,
> > I made bit oprofiling and these two memsets wins competetion for the
> > most expensive line in GCC sources. Yet I believe they are completely
> > useless now when we insist on all operands being used.
> >
> > Bootstrapped/regtested i686-pc-gnu-linux, OK?
>
> I'd prefer that the memsets were just removed altogether.
We used to have bugs in scheduler description accessing non-existent
oprands, this memset should catch them.
>
> When you removed them, did it have any actual compile-time impact?
Yes, it caused about 0.5-1% speedup on non-optimizing compilation in my
tests.
Honza
>
> --
> - Geoffrey Keating <geoffk@geoffk.org>