------- Comment #2 from rguenth at gcc dot gnu dot org 2009-04-14 10:06 -------
It is done by DOM, VRP and/or phicprop.
CCP cannot do it because the PHI node is varying.
Complex lowering does not split PHI nodes into a real/imag part either.
For the same reason as CCP FRE won't do it either.
PRE should be able to phi-translate through the PHI and discover it, but
there's nothing antic-in here.
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rguenth at gcc dot gnu dot org changed:
What |Removed |Added
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CC| |rguenth at gcc dot gnu dot
| |org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39761
