diff options
| author | marxin <marxin@138bc75d-0d04-0410-961f-82ee72b054a4> | 2016-07-12 15:27:36 +0000 |
|---|---|---|
| committer | marxin <marxin@138bc75d-0d04-0410-961f-82ee72b054a4> | 2016-07-12 15:27:36 +0000 |
| commit | 91188633bb94dd42076106c0052a874e9864868c (patch) | |
| tree | 70856e5c2b14b375399cf75b6678131352b177dd /gcc/cfgloopanal.c | |
| parent | 94ee1e9c3d96cf04dc6a8105bdb4aec6f49af549 (diff) | |
| download | gcc-91188633bb94dd42076106c0052a874e9864868c.tar.gz | |
Introduce new param: AVG_LOOP_NITER
* params.def: Add avg-loop niter.
* tree-ssa-loop-ivopts.c (avg_loop_niter): Use the param.
* cfgloopanal.c (expected_loop_iterations_unbounded): Likewise.
* doc/invoke.texi: Document the new parameter.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@238252 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/cfgloopanal.c')
| -rw-r--r-- | gcc/cfgloopanal.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/gcc/cfgloopanal.c b/gcc/cfgloopanal.c index c1639869278..2739f44a3a6 100644 --- a/gcc/cfgloopanal.c +++ b/gcc/cfgloopanal.c @@ -241,10 +241,9 @@ expected_loop_iterations_unbounded (const struct loop *loop, if (read_profile_p) *read_profile_p = false; - /* Average loop rolls about 3 times. If we have no profile at all, it is - best we can do. */ + /* If we have no profile at all, use AVG_LOOP_NITER. */ if (profile_status_for_fn (cfun) == PROFILE_ABSENT) - expected = 3; + expected = PARAM_VALUE (PARAM_AVG_LOOP_NITER); else if (loop->latch->count || loop->header->count) { gcov_type count_in, count_latch; @@ -282,9 +281,9 @@ expected_loop_iterations_unbounded (const struct loop *loop, if (freq_in == 0) { - /* If we have no profile at all, expect 3 iterations. */ + /* If we have no profile at all, use AVG_LOOP_NITER iterations. */ if (!freq_latch) - expected = 3; + expected = PARAM_VALUE (PARAM_AVG_LOOP_NITER); else expected = freq_latch * 2; } |