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Re: [PATCH] nonzero bits as result of PROMOTE_FUNCTION_RETURN


   Date: Tue, 30 Nov 1999 14:13:25 +0100
   From: Jakub Jelinek <jakub@redhat.com>

   If PROMOTE_FUNCTION_RETURN is defined, then we very often can say
   what bits are for sure zero, but combine does not take this into account.
   This patch solves this.

...

   1999-11-30  Jakub Jelinek  <jakub@redhat.com>

	   * combine.c (check_promoted_subreg, record_promoted_value): New
	   functions.
	   (combine_instructions): Use it.

Seems reasonable, and no-one has voiced an object thus far, so
I've installed this patch.

Later,
David S. Miller
davem@redhat.com


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