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| author | Segher Boessenkool <segher@kernel.crashing.org> | 2015-11-07 20:44:21 +0100 |
|---|---|---|
| committer | Segher Boessenkool <segher@gcc.gnu.org> | 2015-11-07 20:44:21 +0100 |
| commit | bc05d49d1064b7fb143c9786ca1fe6a1557163a2 (patch) | |
| tree | de698ca02714d8ef233bb93523bf97fcac800c1c /gcc/common | |
| parent | a153644f75bb7e5c7814eb2a7a4737108018748f (diff) | |
| download | gcc-bc05d49d1064b7fb143c9786ca1fe6a1557163a2.zip gcc-bc05d49d1064b7fb143c9786ca1fe6a1557163a2.tar.gz gcc-bc05d49d1064b7fb143c9786ca1fe6a1557163a2.tar.bz2 | |
i386: Use the STC bb-reorder algorithm at -Os (PR67864)
For x86, STC still gives better results for optimise-for-size than
"simple" does. So use STC at -Os as well.
PR rtl-optimization/67864
* common/config/i386/i386-common.c (ix86_option_optimization_table)
<OPT_freorder_blocks_algorithm_>: Use REORDER_BLOCKS_ALGORITHM_STC
at -Os and up.
From-SVN: r229937
Diffstat (limited to 'gcc/common')
| -rw-r--r-- | gcc/common/config/i386/i386-common.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/gcc/common/config/i386/i386-common.c b/gcc/common/config/i386/i386-common.c index 0f8c3e1..49899bd 100644 --- a/gcc/common/config/i386/i386-common.c +++ b/gcc/common/config/i386/i386-common.c @@ -997,6 +997,9 @@ static const struct default_options ix86_option_optimization_table[] = { OPT_LEVELS_2_PLUS, OPT_free, NULL, 1 }, /* Enable function splitting at -O2 and higher. */ { OPT_LEVELS_2_PLUS, OPT_freorder_blocks_and_partition, NULL, 1 }, + /* The STC algorithm produces the smallest code at -Os, for x86. */ + { OPT_LEVELS_2_PLUS, OPT_freorder_blocks_algorithm_, NULL, + REORDER_BLOCKS_ALGORITHM_STC }, /* Turn off -fschedule-insns by default. It tends to make the problem with not enough registers even worse. */ { OPT_LEVELS_ALL, OPT_fschedule_insns, NULL, 0 }, |