s390.c (s390_select_ccmode): Enable using CC of x + imm for higher immediates on z9-109 upwards.

2012-12-04  Andreas Krebbel  <Andreas.Krebbel@de.ibm.com>

	* config/s390/s390.c (s390_select_ccmode): Enable using CC of
          x + imm for higher immediates on z9-109 upwards.

From-SVN: r194141

gcc/ChangeLog

+2012-12-04  Andreas Krebbel  <Andreas.Krebbel@de.ibm.com>
+
+	* config/s390/s390.c (s390_select_ccmode): Enable using CC of
+          x + imm for higher immediates on z9-109 upwards.
+
 2012-12-04  Richard Earnshaw  <rearnsha@arm.com>
 
 	* arm.opt (cirrus-fix-invalid-insns): Delete option.

gcc/config/s390/s390.c

@@ -691,7 +691,10 @@ s390_select_ccmode (enum rtx_code code, rtx op0, rtx op1)
  	     int a, b; if ((b = a + c) > 0)
  	   with c as a constant value: c < 0 -> CCAN and c >= 0 -> CCAP  */
 	if (GET_CODE (op0) == PLUS && GET_CODE (XEXP (op0, 1)) == CONST_INT
-	    && CONST_OK_FOR_K (INTVAL (XEXP (op0, 1))))
+	    && (CONST_OK_FOR_K (INTVAL (XEXP (op0, 1)))
+		|| (CONST_OK_FOR_CONSTRAINT_P (INTVAL (XEXP (op0, 1)), 'O', "Os")
+		    /* Avoid INT32_MIN on 32 bit.  */
+		    && (!TARGET_ZARCH || INTVAL (XEXP (op0, 1)) != -0x7fffffff - 1))))
 	  {
 	    if (INTVAL (XEXP((op0), 1)) < 0)
 	      return CCANmode;