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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: "mmitchel at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 31 Oct 2005 03:27:02 -0000
- Subject: [Bug tree-optimization/21488] [4.0/4.1 regression] Not copy propagating single-argument PHIs causes out-of-ssa coalescing failure
- References: <bug-21488-280@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #12 from mmitchel at gcc dot gnu dot org 2005-10-31 03:27 -------
Like Diego, I'd like to understand this PR better. Not with a guess, but with
a concrete explanation. If there's an overlapping live range, what range is
it? In order to understand these kinds of optimization PRs, we really need a
better level of detail.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21488