[Bug tree-optimization/84595] __builtin_trap() causes optimizer to remove code

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84595

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Daniel Gutson from comment #3)
> OK. That was my second suggested alternative.
> BTW I didn't see __builtin_trap documented as noreturn in the documentation.

Depends on the reading of __builtin_trap documentation.
My reading says it does not return.

"This function causes the program to exit abnormally.  GCC implements this
function by using a target-dependent mechanism (such as intentionally executing
an illegal instruction) or by calling abort."

Since the documentation talks about calling abort, I would assume __built_trap
should be treated almost the same as calling abort.