https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61522
--- Comment #3 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
Appears to begin with
Commit 211655:
2014-06-13 Vladimir Makarov <vmaka...@redhat.com>
* lra-assign.c (assign_by_spills): Add code to assign vector regs
to inheritance pseudos.
* config/i386/i386.c (ix86_spill_class): Add check on NO_REGS.
causes GCC trunk to fail to build on ARM & AArch64 targets.
