[PATCH v3 1/4] ree: Default ree pass for O2 and above for rs6000 target.

[Ajit Agarwal <aagarwa1@linux.ibm.com>]

Hello All:

This is the patch-1 for improving ree pass for rs6000 target.
Bootstrapped and regtested on powerpc64-linux-gnu.

Thanks & Regards
Ajit

	ree: Improve ree pass for rs6000 target.

	Add ree pass as a default pass for rs6000 target.

	2023-04-19  Ajit Kumar Agarwal  <aagarwa1@linux.ibm.com>

gcc/ChangeLog:

	* common/config/rs6000/rs6000-common.cc: Add REE pass as a
	default rs6000 target pass for O2 and above.
---
 gcc/common/config/rs6000/rs6000-common.cc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/gcc/common/config/rs6000/rs6000-common.cc b/gcc/common/config/rs6000/rs6000-common.cc
index 2140c442ba9..968db215028 100644
--- a/gcc/common/config/rs6000/rs6000-common.cc
+++ b/gcc/common/config/rs6000/rs6000-common.cc
@@ -34,6 +34,8 @@ static const struct default_options rs6000_option_optimization_table[] =
     { OPT_LEVELS_ALL, OPT_fsplit_wide_types_early, NULL, 1 },
     /* Enable -fsched-pressure for first pass instruction scheduling.  */
     { OPT_LEVELS_1_PLUS, OPT_fsched_pressure, NULL, 1 },
+    /* Enable -free for zero extension and sign extension elimination.*/
+    { OPT_LEVELS_2_PLUS, OPT_free, NULL, 1 },
     /* Enable -munroll-only-small-loops with -funroll-loops to unroll small
        loops at -O2 and above by default.  */
     { OPT_LEVELS_2_PLUS_SPEED_ONLY, OPT_funroll_loops, NULL, 1 },
-- 
2.31.1