S/390: Disallow SImode in s390_decompose_address

After Y is never used anymore with SImode operands we can finally
disallow SImode (if != Pmode) in s390_decompose_address.  In fact that
was the whole point of the patch series.

gcc/ChangeLog:

2016-03-01  Andreas Krebbel  <krebbel@linux.vnet.ibm.com>

	* config/s390/s390.c (s390_decompose_address): Don't accept SImode
	anymore.

From-SVN: r233849

gcc/ChangeLog

 2016-03-01  Andreas Krebbel  <krebbel@linux.vnet.ibm.com>
 
+	* config/s390/s390.c (s390_decompose_address): Don't accept SImode
+	anymore.
+
+2016-03-01  Andreas Krebbel  <krebbel@linux.vnet.ibm.com>
+
 	* config/s390/constraints.md ("jm8"): New constraint.
 	* config/s390/predicates.md ("const_int_8bitset_operand"): New predicate.
 	* config/s390/s390.md ("*setmem_long", "*setmem_long_and"): Merge

gcc/config/s390/s390.c

@@ -2817,9 +2817,7 @@ s390_decompose_address (rtx addr, struct s390_address *out)
 	    return false;
 	  }
 
-      if (!REG_P (base)
-	  || (GET_MODE (base) != SImode
-	      && GET_MODE (base) != Pmode))
+      if (!REG_P (base) || GET_MODE (base) != Pmode)
 	return false;
 
       if (REGNO (base) == STACK_POINTER_REGNUM
@@ -2865,9 +2863,7 @@ s390_decompose_address (rtx addr, struct s390_address *out)
 	    return false;
 	  }
 
-      if (!REG_P (indx)
-	  || (GET_MODE (indx) != SImode
-	      && GET_MODE (indx) != Pmode))
+      if (!REG_P (indx) || GET_MODE (indx) != Pmode)
 	return false;
 
       if (REGNO (indx) == STACK_POINTER_REGNUM