Sync with avr-llvm.svn:
r268, faluco: Update patch to reflect the new register ordering generated by tablegen (RegAllocGreedy.diff).
r267, faluco: Upgrade all regression tests to use the new FILE-CHECK directive.
r266, faluco: update patch (relative to interrupt.diff).
One more sync with avr-llvm.svn: r265, faluco: sync with llvm