[Bug rtl-optimization/121648] [13/14/15/16 Regression] wrong code at -O{s, 2, 3} with "-fno-tree-loop-im -fno-gcse -fno-code-hoisting -fno-tree-fre -fno-tree-pre -fno-tree-dominator-opts" on x86_64-linux-gnu

[mikpelinux at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121648

Mikael Pettersson <mikpelinux at gmail dot com> changed:

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--- Comment #4 from Mikael Pettersson <mikpelinux at gmail dot com> ---
My git bisect says it started with:

0b76990a9d75d97b84014e37519086b81824c307 is the first new commit
commit 0b76990a9d75d97b84014e37519086b81824c307 (HEAD)
Author: Richard Sandiford <richard.sandif...@arm.com>
Date:   Thu Dec 17 00:15:12 2020 +0000

    fwprop: Rewrite to use RTL SSA

although, as usual, it may just have exposed a latent issue.