[AArch64] Use aarch64_sve_int_mode in SVE ACLE code

This is a like-for-like change at the moment, but is a prerequisite
for removing mode_for_int_vector.

2019-11-13  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
	* config/aarch64/aarch64-sve-builtins-functions.h
	(unary_count::expand): Use aarch64_sve_int_mode instead of
	mode_for_int_vector.

From-SVN: r278120

gcc/ChangeLog

+2019-11-13  Richard Sandiford  <richard.sandiford@arm.com>
+
+	* config/aarch64/aarch64-sve-builtins-functions.h
+	(unary_count::expand): Use aarch64_sve_int_mode instead of
+	mode_for_int_vector.
+
 2019-11-13  Martin Liska  <mliska@suse.cz>
 
 	* opts.c: Update comment about OPT_LEVELS_2_PLUS_SPEED_ONLY.

gcc/config/aarch64/aarch64-sve-builtins-functions.h

@@ -420,7 +420,7 @@ public:
   expand (function_expander &e) const OVERRIDE
   {
     /* The md patterns treat the operand as an integer.  */
-    machine_mode mode = mode_for_int_vector (e.vector_mode (0)).require ();
+    machine_mode mode = aarch64_sve_int_mode (e.vector_mode (0));
     e.args.last () = gen_lowpart (mode, e.args.last ());
 
     if (e.pred == PRED_x)