re PR rtl-optimization/30213 (Wrong code with optimized memset() (possible bug in...

re PR rtl-optimization/30213 (Wrong code with optimized memset() (possible bug in RTL bbro optimizer))

	PR target/30213
	* i386.c (expand_setmem_epilogue): Fix formating.
	(dsmalest_pow2_greater_than): New function.
	(ix86_expand_movmem): Improve comments; avoid re-computing of
	epilogue size.
	(promote_duplicated_reg_to_size): Break out from ...
	(expand_setmem): ... this one; reorganize promotion code;
	improve comments; avoid recomputation of epilogue size.

From-SVN: r120083