[Bug target/92462] [arm32] -ftree-pre makes a variable to be wrongly hoisted out

[aleksei.voitylov@bell-sw.com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92462

--- Comment #17 from Aleksei Voitylov <aleksei.voitylov@bell-sw.com> ---
(In reply to Andrew Pinski from comment #14)
> Have you tested gcc 7.5.0 that was just released?  How about gcc 8.x? Have
> you tried that.  There has been aliasing bugs in gcc before and this might
> already been fixed.

I just built ToT cross-gcc and the result is the same.

$ arm-linux-gnueabihf-gcc  --version
arm-linux-gnueabihf-gcc (GCC) 10.0.0 20191023 (experimental)
Copyright (C) 2019 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.