[Bug middle-end/98190] GCC 11.0 miscompiles code using _Bool when inlining: bfxil instruction misused?

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98190

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Victor Stinner from comment #3)
> Well, either all 64 bits of w4 and w5 registries should be initialized
> properly, or the comparison should be done only on the least significant 8
> bits:
> 
> (gdb) p ($w5 & 0xff) == ($w4 & 0xff)
> $7 = 1
> 
> These bits are equal as expected ;-)

Again this is undefined behavior.