regmove.c (regmove_optimize): Don't replace a reg with another reg of a different mode.

	* regmove.c (regmove_optimize): Don't replace a reg with
	another reg of a different mode.

From-SVN: r44399

gcc/ChangeLog

+2001-07-26  Kazu Hirata  <kazu@hxi.com>
+
+	* regmove.c (regmove_optimize): Don't replace a reg with
+	another reg of a different mode.
+
 2001-07-26  Andrew MacLeod  <amacleod@redhat.com>
 
 	* params.def (PARAM_MAX_PENDING_LIST_LENGTH): Add parameter to 

gcc/regmove.c

@@ -1244,6 +1244,9 @@ regmove_optimize (f, nregs, regmove_dump_file)
 	      if (! regclass_compatible_p (src_class, dst_class))
 		continue;
 
+	      if (GET_MODE (src) != GET_MODE (dst))
+		continue;
+
 	      if (fixup_match_1 (insn, set, src, src_subreg, dst, pass,
 				 op_no, match_no,
 				 regmove_dump_file))