[NDS32] Enable -malways-align by default at -O1 and above.

gcc/
	* common/config/nds32/nds32-common.c
	(nds32_option_optimization_table): Enalbe -malways-align.

From-SVN: r263495

gcc/ChangeLog

 2018-08-12  Chung-Ju Wu  <jasonwucj@gmail.com>
 
+	* common/config/nds32/nds32-common.c
+	(nds32_option_optimization_table): Enalbe -malways-align.
+
+2018-08-12  Chung-Ju Wu  <jasonwucj@gmail.com>
+
 	* config.gcc (nds32*): Add nds32_isr.h and nds32_init.inc in
 	extra_headers.
 	* common/config/nds32/nds32-common.c (nds32_handle_option): Handle

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

@@ -95,6 +95,8 @@ static const struct default_options nds32_option_optimization_table[] =
   { 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 },
+  /* Enalbe -malways-align by default at -O1 and above, but not -Os or -Og.  */
+  { OPT_LEVELS_1_PLUS_SPEED_ONLY, OPT_malways_align,       NULL, 1 },
   /* Enable -mv3push by default at -Os, but it is useless under V2 ISA.  */
   { OPT_LEVELS_SIZE,              OPT_mv3push,             NULL, 1 },