[Bug tree-optimization/23452] Optimizing CONJG_EXPR (a) * a

[pinskia at gcc dot gnu dot org]

------- Comment #5 from pinskia at gcc dot gnu dot org  2006-11-01 04:30 -------
(In reply to comment #3)
> This is now fixed on mainline provided the user specifies -ffast-math.
> There are some complications where imagpart(z*~z) can be non-zero, if
> imagpart(z) is non-finite, such as an Inf or a NaN.  It's unclear from
> the fortran-95 standard whether gfortran is allowed to optimize this
> even without -ffast-math.

Well Fortran 95 does not have non-finite except with a TR and the IEEE fp
types, I forgot the number and the name


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23452