combine.c (subst): Use reg_overlap_mentioned_p instead of comparing register numbers directly.

2007-06-11  Seongbae Park <seongbae.park@gmail.com>

	* combine.c (subst): Use reg_overlap_mentioned_p
	instead of comparing register numbers directly.

From-SVN: r125634

gcc/ChangeLog

+2007-06-11  Seongbae Park <seongbae.park@gmail.com>
+
+	* combine.c (subst): Use reg_overlap_mentioned_p
+	instead of comparing register numbers directly.
+
 2007-06-11  Kenneth Zadeck <zadeck@naturalbridge.com>
 
 	* reload1.c (mark_home_live_1): Use the mode parameter.

gcc/combine.c

@@ -4237,7 +4237,7 @@ subst (rtx x, rtx from, rtx to, int in_dest, int unique_copy)
 
      So force this insn not to match in this (rare) case.  */
   if (! in_dest && code == REG && REG_P (from)
-      && REGNO (x) == REGNO (from))
+      && reg_ovelap_mentioned_p (x, from))
     return gen_rtx_CLOBBER (GET_MODE (x), const0_rtx);
 
   /* If this is an object, we are done unless it is a MEM or LO_SUM, both