[NDS32] Enable relax hint by default.

gcc/
	* common/config/nds32/nds32-common.c
	(nds32_option_optimization_table): Enable -mreleax-hint by default.

From-SVN: r259160

gcc/ChangeLog

+2018-04-06  Kuan-Lin Chen  <kuanlinchentw@gmail.com>
+
+	* common/config/nds32/nds32-common.c
+	(nds32_option_optimization_table): Enable -mreleax-hint by default.
+
 2018-04-05  Jakub Jelinek  <jakub@redhat.com>
 
 	PR middle-end/85195
@@ -262,7 +267,7 @@
 
 2018-04-01  Chung-Ju Wu  <jasonwucj@gmail.com>
 	    Kito Cheng  <kito.cheng@gmail.com>
-	    Kuan-Lin Chen <kuanlinchentw@gmail.com>
+	    Kuan-Lin Chen  <kuanlinchentw@gmail.com>
 
 	* config.gcc (nds32): Add nds32-relax-opt.o into extra_objs.
 	* config/nds32/constants.md (unspec_volatile_element): Add

gcc/common/config/nds32/nds32-common.c

@@ -78,6 +78,8 @@ static const struct default_options nds32_option_optimization_table[] =
   { OPT_LEVELS_1_PLUS,            OPT_fsched_pressure,     NULL, 1 },
   /* Enable -fomit-frame-pointer by default at all optimization levels.  */
   { OPT_LEVELS_ALL,               OPT_fomit_frame_pointer, NULL, 1 },
+  /* Enable -mrelax-hint by default at all optimization levels.  */
+  { OPT_LEVELS_ALL,               OPT_mrelax_hint,         NULL, 1 },
   /* Enable -mv3push by default at -Os, but it is useless under V2 ISA.  */
   { OPT_LEVELS_SIZE,              OPT_mv3push,             NULL, 1 },