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[Bug tree-optimization/21488] [4.0/4.1 regression] Not copy propagating single-argument PHIs causes out-of-ssa coalescing failure
- From: "dnovillo at redhat dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 10 May 2005 23:33:58 -0000
- Subject: [Bug tree-optimization/21488] [4.0/4.1 regression] Not copy propagating single-argument PHIs causes out-of-ssa coalescing failure
- References: <20050510124823.21488.steven@gcc.gnu.org>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From dnovillo at redhat dot com 2005-05-10 23:33 -------
Subject: Re: [4.0/4.1 regression] Not copy propagating single-argument PHIs causes out-of-ssa coalescing failure
On Tue, May 10, 2005 at 11:27:17PM -0000, pinskia at gcc dot gnu dot org wrote:
>
> ------- Additional Comments From pinskia at gcc dot gnu dot org 2005-05-10 23:27 -------
> (In reply to comment #8)
>
> > Be more specific:
> >
> > 1- What exactly is being "messed up".
> Read Zdenek's comment about renaming them.
>
> > 2- Why is it wrong?
>
> Because now we have "unresolvable overlapping live ranges"
>
> > 3- How would "fixing" this affect PR 18048?
> I don't know if it does. The bug which Steven was referencing was really PR 19038, well there was some
> discussion in PR 18048 about this problem also.
>
> > 4- What do you think should be done differently?
> Not creating "unresolvable overlapping live ranges", how I don't know.
>
You really didn't understand my point, did you? You needlessly
added noise to the PR. Nothing you said was new information nor
was it useful to the person fixing this problem.
I appreciate the triaging work that you do, but I don't
appreciate random noise in PRs, particularly when that implies
more mail in my inbox.
Diego.
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21488