Could be. I don't know the specifics. I do know that the bar is pretty high, in general, before gcc will commit. I think that simply goes with the territory with such a large project where a lot of people depend on it to just work.

For example, an acquaintance plays (at least used to) a large role in the AVR (8 bit) back-end. He went to a gcc summit to lobby for avr-gcc being upgraded to a support tier where functional (not performance) regressions would be release show-stoppers. His argument: Over a million downloads per month. It took that much to get the gcc steering committee to even consider it. gcc is a big project, they can't afford to make commitments lightly.