[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 #5 from Drea Pinski <pinskia at gcc dot gnu.org> ---
I think there are 2 ways of handling this.
1) just reject (delay) conditional reads from bool and non mode precision
integral types.  I suspect there will be some issue with say long double on x87
too.