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Re: rs6000 warnings cleanup and cbranch fix


	If -mpowerpc64 now works, that is news to me.  Every time I and
others have played with it, we have received ICEs in emit_move_insn(),
etc.  That mode could work and would be useful, but currently it does not
work.  Until it works reliably without ICEs, users should not be allowed
to invoke that mode.

David


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