[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 #3 from Drea Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Drea Pinski from comment #2)
> My patch for PR 128213 already fixes this.

Though that is because I reject `a.b` as not a decl so don't know anything
about it.