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-rw-r--r--gcc/common/config/rs6000/rs6000-common.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/gcc/common/config/rs6000/rs6000-common.c b/gcc/common/config/rs6000/rs6000-common.c
index b947196..9dc7ae8 100644
--- a/gcc/common/config/rs6000/rs6000-common.c
+++ b/gcc/common/config/rs6000/rs6000-common.c
@@ -35,7 +35,14 @@ 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 },
- { OPT_LEVELS_2_PLUS, OPT_funroll_loops, 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 },
+ { OPT_LEVELS_2_PLUS_SPEED_ONLY, OPT_munroll_only_small_loops, NULL, 1 },
+ /* -fweb and -frename-registers are useless in general for rs6000,
+ turn them off. */
+ { OPT_LEVELS_ALL, OPT_fweb, NULL, 0 },
+ { OPT_LEVELS_ALL, OPT_frename_registers, NULL, 0 },
{ OPT_LEVELS_NONE, 0, NULL, 0 }
};