Hi all,

This is another instance of conditional compilation on WORD_REGISTER_OPERATIONS that's trivial to remove.

Bootstrapped and tested on arm, aarch64, x86_64.
Committing to trunk as obvious.

Thanks,
Kyrill

2016-04-28  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>

     * internal-fn.c (expand_arith_overflow): Convert preprocessor check
     for WORD_REGISTER_OPERATIONS to runtime check.