https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80758
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-15
CC| |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. Long on (my) TODO list. Simplest version would propagate
fpclassify () bits plus signbit (). Special values might be interesting as
well ("not zero",
one, minus one, integer).
General value-range propagation might be doable but is more work.
SSA info needs to be enhanced to record FP stuff.
