so we can enforce correctness a bit more at build-time. if the helper program does not fit in the required RA, spilling will be broken in the driver; now this is a build-time failure instead of a silent runtime one. Closes https://gitlab.freedesktop.org/asahi/mesa/-/issues/36 Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/27616>