https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71078
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-12
CC| |rguenth at gcc dot gnu.org
Component|tree-optimization |middle-end
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. Similar to
/* Optimize A / A to 1.0 if we don't care about
NaNs or Infinities. */
(simplify
(rdiv @0 @0)
(if (FLOAT_TYPE_P (type)
&& ! HONOR_NANS (type)
&& ! HONOR_INFINITIES (type))
{ build_one_cst (type); }))
/* Optimize -A / A to -1.0 if we don't care about
NaNs or Infinities. */
(simplify
(rdiv:C @0 (negate @0))
(if (FLOAT_TYPE_P (type)
&& ! HONOR_NANS (type)
&& ! HONOR_INFINITIES (type))
{ build_minus_one_cst (type); }))
