[Bug tree-optimization/65930] Reduction with sign-change not handled

[tnfchris at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65930

--- Comment #22 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
It also causes failures on AArch64.


FAIL: gcc.target/aarch64/sve/reduc_2.c
FAIL: gcc.target/aarch64/sve/slp_7.c
FAIL: gcc.target/aarch64/sve/slp_5.c
FAIL: gcc.target/aarch64/sve/reduc_1.c

I've also noticed a few ICEs on SPEC but haven't pinpointed it to this commit
yet. Running a bisect.