[PATCH] nonzero bits as result of PROMOTE_FUNCTION_RETURN
David S. Miller
davem@redhat.com
Mon Dec 6 11:46:00 GMT 1999
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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