Add missing ATTRIBUTE_UNUSED for ix86_libc_has_fast_function.

2019-05-20  Martin Liska  <mliska@suse.cz>

	* config/i386/i386.c (ix86_libc_has_fast_function):
	Add ATTRIBUTE_UNUSED for the argument.

From-SVN: r271406

gcc/ChangeLog

+2019-05-20  Martin Liska  <mliska@suse.cz>
+
+	* config/i386/i386.c (ix86_libc_has_fast_function):
+	Add ATTRIBUTE_UNUSED for the argument.
+
 2019-05-20  Richard Biener  <rguenther@suse.de>
 
 	* gimple-match-head.c: Include vec-perm-indices.h.

gcc/config/i386/i386.c

@@ -23074,7 +23074,7 @@ ix86_run_selftests (void)
 #define TARGET_GET_MULTILIB_ABI_NAME \
   ix86_get_multilib_abi_name
 
-static bool ix86_libc_has_fast_function (int fcode)
+static bool ix86_libc_has_fast_function (int fcode ATTRIBUTE_UNUSED)
 {
 #ifdef OPTION_GLIBC
   if (OPTION_GLIBC)