[Bug tree-optimization/128265] [16/17 Regression] wrong code at -O1 and above: a conditionally read bool union member is loaded while the union holds another member

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=128265

--- Comment #4 from Drea Pinski <pinskia at gcc dot gnu.org> ---
Created attachment 66025
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=66025&action=edit
testcase that fails after my other patch anyways