* opts.h (CL_PCH_IGNORE): Define.
        * targhooks.c (option_affects_pch_p):
        Return false for options that have CL_PCH_IGNORE set.
        * opt-functions.awk: Process PchIgnore.
        * doc/options.texi: Document PchIgnore.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@208292 138bc75d-0d04-0410-961f-82ee72b054a4
        * config/arc/arc.opt (misize): Add PchIgnore property.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@208293 138bc75d-0d04-0410-961f-82ee72b054a4
        * config/arc/arc.md (casesi_load) <length attribute alternative 0>:
        Mark as varying.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@208294 138bc75d-0d04-0410-961f-82ee72b054a4