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i386 performance problem due to regmove.c change


I seem to be seeing around a 3 percent performance hit when
running the crafty chess benchmark and the Brl-Cad raytracing
benchmarks on an Intel Pentium II with:

Thu Jun 11 14:50:02 1998  Michael Meissner  <meissner@cygnus.com>

	* regmove.c (regmove_optimize): If we can't replace the
	destination in an insn that sets the source, generate an explicit
	move of the source to the destination.
	(copy_src_to_dest): New function.

installed.  If I remove this patch then life gets better (not to
mention faster :-).

-- John
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