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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


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