S/390: Remove unused expanders from vx-builtins.md

These expanders are currently not used.  The vecintrin.h header file
expands e.g. vec_ceil directly to the vfidb low-level builtin.

gcc/ChangeLog:

2017-02-02  Andreas Krebbel  <krebbel@linux.vnet.ibm.com>

	* config/s390/vx-builtins.md ("vec_ceil", "vec_floor")
	("vec_trunc", "vec_roundc", "vec_round"): Remove expanders.

From-SVN: r245123

gcc/ChangeLog

 2017-02-02  Andreas Krebbel  <krebbel@linux.vnet.ibm.com>
 
+	* config/s390/vx-builtins.md ("vec_ceil", "vec_floor")
+	("vec_trunc", "vec_roundc", "vec_round"): Remove expanders.
+
+2017-02-02  Andreas Krebbel  <krebbel@linux.vnet.ibm.com>
+
 	* config/s390/s390.md: Add missing comments with the expanded
 	mnemonics.
 	* config/s390/vector.md: Likewise.

gcc/config/s390/vx-builtins.md

@@ -1745,41 +1745,6 @@
   "vfidb\t%v0,%v1,%b2,%b3"
   [(set_attr "op_type" "VRR")])
 
-(define_expand "vec_ceil"
-  [(set (match_operand:V2DI               0 "register_operand" "")
-	(unspec:V2DI [(match_operand:V2DF 1 "register_operand" "")
-		      (const_int VEC_RND_TO_INF)]
-		     UNSPEC_VEC_VFIDB))]
-  "TARGET_VX")
-
-(define_expand "vec_floor"
-  [(set (match_operand:V2DI               0 "register_operand" "")
-	(unspec:V2DI [(match_operand:V2DF 1 "register_operand" "")
-		      (const_int VEC_RND_TO_MINF)]
-		     UNSPEC_VEC_VFIDB))]
-  "TARGET_VX")
-
-(define_expand "vec_trunc"
-  [(set (match_operand:V2DI               0 "register_operand" "")
-	(unspec:V2DI [(match_operand:V2DF 1 "register_operand" "")
-		      (const_int VEC_RND_TO_ZERO)]
-		     UNSPEC_VEC_VFIDB))]
-  "TARGET_VX")
-
-(define_expand "vec_roundc"
-  [(set (match_operand:V2DI               0 "register_operand" "")
-	(unspec:V2DI [(match_operand:V2DF 1 "register_operand" "")
-		      (const_int VEC_RND_CURRENT)]
-		     UNSPEC_VEC_VFIDB))]
-  "TARGET_VX")
-
-(define_expand "vec_round"
-  [(set (match_operand:V2DI               0 "register_operand" "")
-	(unspec:V2DI [(match_operand:V2DF 1 "register_operand" "")
-		      (const_int VEC_RND_NEAREST_TO_EVEN)]
-		     UNSPEC_VEC_VFIDB))]
-  "TARGET_VX")
-
 
 ; Vector load lengthened - V4SF -> V2DF