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| author | guojiufu <guojiufu@linux.ibm.com> | 2020-05-28 13:42:23 +0800 |
|---|---|---|
| committer | guojiufu <guojiufu@linux.ibm.com> | 2020-06-07 17:35:01 +0800 |
| commit | 71489d8e7572388c6e9528a45e4942b7c7b67e4f (patch) | |
| tree | a4b5cb277348fe0df2f53f9ab0de532dd4ad8d9d /gcc/toplev.c | |
| parent | 905ba62ec96f8469c1085861d9ceec58fbee5709 (diff) | |
| download | gcc-71489d8e7572388c6e9528a45e4942b7c7b67e4f.zip gcc-71489d8e7572388c6e9528a45e4942b7c7b67e4f.tar.gz gcc-71489d8e7572388c6e9528a45e4942b7c7b67e4f.tar.bz2 | |
Introduce flag_cunroll_grow_size for cunroll
Currently GIMPLE complete unroller(cunroll) is checking
flag_unroll_loops and flag_peel_loops to see if allow size growth.
Beside affects curnoll, flag_unroll_loops also controls RTL unroler.
To have more freedom to control cunroll and RTL unroller, this patch
introduces flag_cunroll_grow_size. With this patch, we can control
cunroll and RTL unroller indepently.
gcc/ChangeLog
2020-06-07 Jiufu Guo <guojiufu@linux.ibm.com>
* common.opt (flag_cunroll_grow_size): New flag.
* toplev.c (process_options): Set flag_cunroll_grow_size.
* tree-ssa-loop-ivcanon.c (pass_complete_unroll::execute):
Use flag_cunroll_grow_size.
Diffstat (limited to 'gcc/toplev.c')
| -rw-r--r-- | gcc/toplev.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/gcc/toplev.c b/gcc/toplev.c index 1a75485..95eea63 100644 --- a/gcc/toplev.c +++ b/gcc/toplev.c @@ -1482,6 +1482,11 @@ process_options (void) if (flag_unroll_all_loops) flag_unroll_loops = 1; + /* Allow cunroll to grow size accordingly. */ + if (flag_cunroll_grow_size == AUTODETECT_VALUE) + flag_cunroll_grow_size + = flag_unroll_loops || flag_peel_loops || optimize >= 3; + /* web and rename-registers help when run after loop unrolling. */ if (flag_web == AUTODETECT_VALUE) flag_web = flag_unroll_loops; |