[Bug rtl-optimization/122343] Propagate volatile memory operands

[ubizjak at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122343

--- Comment #2 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Andrew Pinski from comment #1)
> Dup.
Hm, PR3506 deals with RMW operations, the one in this PR is not.