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Re: PATCH: Initialize tmp_obstack
On Tue, Dec 05, 2006 at 04:56:39PM -0500, Daniel Jacobowitz wrote:
> I think we're being overly optimistic if we expect GCC to get it right
> all the time. In fact, I asked a bunch of GCC developers about it on
> IRC and the best response I got was "then you are screwed". Or Diego's
> explanation:
>
> > We don't explicitly try to handle it. it's mostly side-effect of
> > various optimizations. some times it's jump-threading, others it's
> > PRE, others it's CCP, others it's VRP.
>
> > that irritates the hell out of me. we depend on optimizations for
> > this warning.
>
> I know that's a widely held position.
For the record, his followup makes that come out a bit differently:
> I would love for someone to tackle this particular warning in
> an explicit and deterministic way.
--
Daniel Jacobowitz
CodeSourcery