[Bug rtl-optimization/10050] ifcvt is not smart enough

[ian at airs dot com]

------- Comment #9 from ian at airs dot com  2006-01-15 06:27 -------
Upon further reflection, I don't think this is amenable to a good fix using
conditional moves.  func2 doesn't read from a.  Using conditional moves will
require adding reads from a.  It's not obvious that that is a good tradeoff.

When I look at the code generated for i686 at -O2, the only problem I see is
that for some reason gcc doesn't recognize that a[0] and a[1] can not alias
each other, and it reloads a[0] after writing to a[1].


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=10050