------- Comment #36 from dominiq at lps dot ens dot fr 2010-03-16 15:06 -------
> Note that the replacement for x**(n/3) * cbrt(x)**(n%3) does not seems guarded
> by any optimisation flag.
The condition is implemented further down in the code and I missed it:
if (real_identical (&c2, &c)
&& ((optimize_insn_for_speed_p ()
&& powi_cost (n/3) <= POWI_MAX_MULTS)
|| n == 1))
Why the condition optimize_insn_for_speed_p () is not part of
if (fn != NULL_TREE
&& flag_unsafe_math_optimizations
&& (tree_expr_nonnegative_p (arg0)
|| !HONOR_NANS (mode)))
?
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40106
