[Bug tree-optimization/21488] [4.0/4.1 regression] Not copy propagating single-argument PHIs causes out-of-ssa coalescing failure

[mmitchel 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.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21488