[Bug target/107160] [13 regression] r13-2641-g0ee1548d96884d causes verification failure in spec2006

[linkw at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107160

Kewen Lin <linkw at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2022-10-12
     Ever confirmed|0                           |1

--- Comment #6 from Kewen Lin <linkw at gcc dot gnu.org> ---
Confirmed.

The option can be reduced to: -m64 -O3 -mcpu=power8 -ffast-math

The culprit loop is the one in function l1_norm of file vector.cc (actually
it's from the header file). The resulting gimple after loop vect pass looks
weird to me, it seems not to expose one issue related to math but one actual
vect issue. I'll check it further and post one reduced test case.