https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78751
Aldy Hernandez <aldyh at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-12-09
CC| |aldyh at gcc dot gnu.org,
| |meissner at gcc dot gnu.org,
| |segher at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Aldy Hernandez <aldyh at gcc dot gnu.org> ---
Confirmed. Started with the patch below, though it is unlikely to be the
problem, as this is a back end problem. It is most likely associated with a
handful of rs6000 changes by Meissner or Segher around the same time.
commit 0d56015c6a1200605edf7bb30bea06f0b436a183
Author: law <law@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Fri Nov 11 16:00:47 2016 +0000
* gimple-ssa-isolate-paths.c (is_divmod_with_given_divisor): New
function.
(stmt_uses_name_in_undefined_way): New function, extracted from
find_implicit_erroneous_behavior and extended for div/mod case.
(stmt_uses_0_or_null_in_undefined_way): New function, extracted from
find_explicit_erroneous_behavior and extended for div/mod case.
(find_implicit_erroneous_behavior): Use new helper function.
(find_explicit_erroneous_behavior): Use new helper function.
* gcc.dg/tree-ssa/isolate-6.c: New test.
* gcc.dg/tree-ssa/isolate-7.c: New test.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@242075
138bc75d-0d04-0410-961f-82ee72b054a4
