[Bug middle-end/40106] [4.4/4.5 Regression] Weird interaction between optimize_insn_for_speed_p and -funsafe-math-optimizations

[dominiq at lps dot ens dot fr]

------- Comment #46 from dominiq at lps dot ens dot fr  2010-03-18 18:29 -------
The answer to the question (b) in comment #35:

> (b) why !optimize_size has been replaced with optimize_insn_for_speed_p ()?

seems to be

> this patch replace some of optimize_size tests by
> optimize_insn_for_speed_p predicate so we can make decisions on per-BB
> granuality.

from http://gcc.gnu.org/ml/gcc-patches/2008-08/msg00121.html  (revision 138565
by hubicka, Sun Aug 3 12:04:49 2008 UTC).

Why is there any need to expand pow(x,n) "on per-BB granularity"? is not
!optimize_size enough for this case?


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40106