[Bug tree-optimization/101278] [12 regression] g++ miscompiles cmake-3.18.5

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101278

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 51093
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=51093&action=edit
untested patch

I will test this.  Self-assignments x = x are handled explicitely already.