[Bug middle-end/31723] Use reciprocal and reciprocal square root with -ffast-math

[rguenth at gcc dot gnu dot org]

------- Comment #9 from rguenth at gcc dot gnu dot org  2007-04-27 22:03 -------
I looked at this at some time and in priciple it doens't require it.  For the
vectorized call we'd need to support target dependent pattern vectorization,
for the scalar case we would need a new optab to handle 1/x expansion
specially.
Now, for 1/sqrt a builtin could make sense, but even that can be handled via
another optab at expansion time.

Just to have the time and start experimenting...


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31723