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| author | Martin Liska <mliska@suse.cz> | 2016-07-12 17:27:36 +0200 |
|---|---|---|
| committer | Martin Liska <marxin@gcc.gnu.org> | 2016-07-12 15:27:36 +0000 |
| commit | 4661839ee33dff6b43625e9e69fd9a74830556b4 (patch) | |
| tree | 70856e5c2b14b375399cf75b6678131352b177dd /gcc/cfgloopanal.c | |
| parent | f507d20235bb7c05ce24c92f65b8aead2594e797 (diff) | |
| download | gcc-4661839ee33dff6b43625e9e69fd9a74830556b4.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.
From-SVN: r238252
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; } |