reorg.c (fill_slots_from_thread): Check modified_in_p before replacing.

        * reorg.c (fill_slots_from_thread): Check modified_in_p
        before replacing.

From-SVN: r31349

gcc/ChangeLog

+Wed Jan 12 03:24:41 2000  Toshiyasu Morita (toshi.morita@sega.com)
+
+	* reorg.c (fill_slots_from_thread): Check modified_in_p
+	before replacing.
+
 Wed Jan 12 03:20:31 2000  John Marshall <john_w_marshall@palm.com>
 
 	* gcc.texi (Funding, GNU/Linux, Copying, Contributors): Format

gcc/reorg.c

@@ -2748,7 +2748,8 @@ fill_slots_from_thread (insn, condition, thread, opposite_thread, likely,
 	      && GET_CODE (PATTERN (next)) != USE
 	      && ! reg_set_p (SET_DEST (pat), next)
 	      && ! reg_set_p (SET_SRC (pat), next)
-	      && reg_referenced_p (SET_DEST (pat), PATTERN (next)))
+	      && reg_referenced_p (SET_DEST (pat), PATTERN (next))
+	      && ! modified_in_p (SET_DEST (pat), next))
 	    validate_replace_rtx (SET_DEST (pat), SET_SRC (pat), next);
 	}
     }