llvm dev - Aug 2015 - builtin_constant_p support in LLVM IR

I found this bug report on builtin_constant_p support in LLVM.

http://llvm.org/bugs/show_bug.cgi?id=4898

It looks like there was some interest in this, and that there was even a patch
doing some work on that, but
it seems to have been abandoned.  I couldn't tell if this was really because
the community decided that support
for builtin_constant_p in LLVM IR was undesirable, or if the person working on
this just lost interest.

Kevin Smith