[Bug tree-optimization/24333] missed div optimizations?

[pinskia at gcc dot gnu dot org]

------- Comment #3 from pinskia at gcc dot gnu dot org  2005-10-12 16:04 -------
(In reply to comment #2)
> basing on the http://en.wikipedia.org/wiki/L'hospital we get:
> 
> lim  (x / x) = lim (x' / x') = lim (1 / 1) = 1
> x->0           x->0            x->0

for float/float, we should get NANs with -ffast-math which assumes
-ffinite-math, for long/long and unsigned/unsigned, we have this thing called
undefinedness. BUT for java, 0/0 is defined to throw IIRC so we can only do
that for signed/signed and with -fno-wrapv.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24333