https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84515
Jeffrey A. Law <law at redhat dot com> changed:
What |Removed |Added
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CC| |law at redhat dot com
--- Comment #4 from Jeffrey A. Law <law at redhat dot com> ---
The degenerate PHI is a bit of a red-herring. It's turned into a degenerate
via uncprop to discourage the unnecessary constant initialization.
Really the key here is we need to know the relationship between _20 and
count_11.
That relationship is that count_11 >= _20
But EVRP never gives us that symbolic relationship so threading really never
gets a chance.
