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Re: birthpoints in rtl.
"Steven Bosscher" <email@example.com> writes:
> On Thu, Feb 28, 2008 at 2:32 PM, Paolo Bonzini <firstname.lastname@example.org> wrote:
> > > Thanks for the quick response. As it turns out, the libcall issue will
> > > soon be gone, as bonzini will be deleting them. We have finally
> > > overcome that issue.
> > Not really. There seems always to be something that prevents them from
> > being deleted, and I have no time to spend on GCC at work right now. I
> > believe Steven Bosscher has more detail on that than I do.
> We had this discussion last year. The only reason to still have
> libcalls was for TLS address calls. You already fixed that. To the
> best of my knowledge the only other thing libcalls are still "useful"
> for, is scheduling of groups of insns (iirc it's SCHED_GROUP_P or
> something like that). And didn't you mention an fwrapv issue that's
> currently papered over by libcall notes??
libcalls are still used for no-conflict blocks. This may be what you
mean by the scheduling thing. No-conflict blocks are emitted by
emit_no_conflict_block and checked in local-alloc.