https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121852
--- Comment #4 from Mikael Pettersson <mikpelinux at gmail dot com> ---
With -O2 -fno-gcse -ftree-slp-vectorize it started at r11-6188-g0b76990a9d75d9:
0b76990a9d75d97b84014e37519086b81824c307 is the first new commit
commit 0b76990a9d75d97b84014e37519086b81824c307
Author: Richard Sandiford <richard.sandif...@arm.com>
Date: Thu Dec 17 00:15:12 2020 +0000
fwprop: Rewrite to use RTL SSA
