[PATCH] mn10300: Use the STC bb-reorder algorithm at -Os

[Segher Boessenkool]

For mn10300, STC still gives better results for optimise-for-size than
"simple" does.  So use STC at -Os as well.

Is this okay for trunk?


Segher


2015-10-16  Segher Boessenkool  <seg...@kernel.crashing.org>

        * common/config/mn10300/mn10300-common.c
        (mn10300_option_optimization_table) <OPT_freorder_blocks_algorithm_>:
        Use REORDER_BLOCKS_ALGORITHM_STC at -Os and up.

---
 gcc/common/config/mn10300/mn10300-common.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/gcc/common/config/mn10300/mn10300-common.c 
b/gcc/common/config/mn10300/mn10300-common.c
index 2df93eb..52421e5 100644
--- a/gcc/common/config/mn10300/mn10300-common.c
+++ b/gcc/common/config/mn10300/mn10300-common.c
@@ -30,6 +30,9 @@
 static const struct default_options mn10300_option_optimization_table[] =
   {
     { OPT_LEVELS_1_PLUS, OPT_fomit_frame_pointer, NULL, 1 },
+    /* The STC algorithm produces the smallest code at -Os.  */
+    { OPT_LEVELS_2_PLUS, OPT_freorder_blocks_algorithm_, NULL,
+      REORDER_BLOCKS_ALGORITHM_STC },
     { OPT_LEVELS_NONE, 0, NULL, 0 }
   };
 
-- 
2.4.3