[Bug rtl-optimization/78559] [7 Regression] wrong code due to tree if-conversion?

[segher at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78559

--- Comment #10 from Segher Boessenkool <segher at gcc dot gnu.org> ---
I am leaning toward accepting Bin's patch, but testing whether that hurts
generated code too much still hasn't finished.