[Bug tree-optimization/63375] [4.8/4.9/5 Regression] reordering of reads across fences

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63375

--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
No, RTL forwprop1 still breaks the testcase according to comment #4.