https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112296
--- Comment #7 from Richard Henderson <rth at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #5)
> int bad1(void) { return __builtin_constant_p(global++); }
...
> Joseph, Richard, do you have anything to add or remember discussions about
> this semantic detail of __builtin_constant_p?
Since it has been 25 years, I don't recall any specific discussions.
The intended use-case at the time was more like
#define macro(x) \
(__builtin_constant_p(x) \
? inline_expression(x) \
: out_of_line_function(x))
So I would have expected side effects to have been ignored for
the builtin and expanded via one of the two arms.
