combine.c (simplify_and_const_int): Properly sign-extend CONSTOP.

	2002-01-21  Franz Sirl  <Franz.Sirl-kernel@lauterbach.com>

	* combine.c (simplify_and_const_int): Properly sign-extend CONSTOP.

From-SVN: r49057

gcc/ChangeLog

+2002-01-21  Franz Sirl  <Franz.Sirl-kernel@lauterbach.com>
+
+	* combine.c (simplify_and_const_int): Properly sign-extend CONSTOP.
+
 2002-01-21  John David Anglin  <dave@hiauly1.hia.nrc.ca>
 
 	* pa64-hpux.h (MD_EXEC_PREFIX): Set to "/usr/ccs/bin".

gcc/combine.c

@@ -7830,6 +7830,7 @@ simplify_and_const_int (x, mode, varop, constop)
 
   else
     {
+      constop = trunc_int_for_mode (constop, mode);
       if (GET_CODE (XEXP (x, 1)) != CONST_INT
 	  || (unsigned HOST_WIDE_INT) INTVAL (XEXP (x, 1)) != constop)
 	SUBST (XEXP (x, 1), GEN_INT (constop));