lib1funcs.S (__muldi3): No need to clear zero_reg as previous call to…

lib1funcs.S (__muldi3): No need to clear zero_reg as previous call to __umulhisi3 already cleared it.

	* config/avr/lib1funcs.S (__muldi3) [have MUL]: No need to clear
	zero_reg as previous call to __umulhisi3 already cleared it.

From-SVN: r238850

libgcc/ChangeLog

+2016-07-29  Georg-Johann Lay  <avr@gjlay.de>
+
+	* config/avr/lib1funcs.S (__muldi3) [have MUL]: No need to clear
+	zero_reg as previous call to __umulhisi3 already cleared it.
+
 2016-07-21  Aurelien Jarno <aurelien@aurel32.net>
 
 	PR target/59833

libgcc/config/avr/lib1funcs.S

@@ -958,7 +958,6 @@ DEFUN __muldi3
     wmov    A4, C4
     wmov    A6, C6
 
-    clr     __zero_reg__
     pop     r16
     pop     r17
     pop     r28