[AArch64] Use aarch64_sve_int_mode in SVE ACLE code

[Richard Sandiford]

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

Tested on aarch64-linux-gnu and applied as r278120.

Richard


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

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

Index: gcc/config/aarch64/aarch64-sve-builtins-functions.h
===================================================================
--- gcc/config/aarch64/aarch64-sve-builtins-functions.h 2019-10-29 
08:59:18.411479577 +0000
+++ gcc/config/aarch64/aarch64-sve-builtins-functions.h 2019-11-13 
08:56:37.623467069 +0000
@@ -420,7 +420,7 @@ #define GCC_AARCH64_SVE_BUILTINS_FUNCTIO
   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)