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| author | Jan Hubicka <hubicka@ucw.cz> | 2017-06-16 21:02:46 +0200 |
|---|---|---|
| committer | Jan Hubicka <hubicka@gcc.gnu.org> | 2017-06-16 19:02:46 +0000 |
| commit | aa11163b181893ed79dc1c75547b0109b342372e (patch) | |
| tree | 22146ca895c35eae24514389bea670f0509f1c89 /gcc | |
| parent | 8d71d7cd025d5b0b62a8cb9fd99c38f1b37fcc7d (diff) | |
| download | gcc-aa11163b181893ed79dc1c75547b0109b342372e.zip gcc-aa11163b181893ed79dc1c75547b0109b342372e.tar.gz gcc-aa11163b181893ed79dc1c75547b0109b342372e.tar.bz2 | |
gimple-ssa-isolate-paths.c (isolate_path): Set edge leading to path as unlikely; update profile.
* gimple-ssa-isolate-paths.c (isolate_path): Set edge leading to path
as unlikely; update profile.
From-SVN: r249277
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/gimple-ssa-isolate-paths.c | 13 |
2 files changed, 18 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index b22b567..dfabe17 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,10 @@ 2017-06-16 Jan Hubicka <hubicka@ucw.cz> + * gimple-ssa-isolate-paths.c (isolate_path): Set edge leading to path + as unlikely; update profile. + +2017-06-16 Jan Hubicka <hubicka@ucw.cz> + * predict.c (force_edge_cold): Handle declaring edges impossible more aggresively. diff --git a/gcc/gimple-ssa-isolate-paths.c b/gcc/gimple-ssa-isolate-paths.c index 7babe09..7ad39b4 100644 --- a/gcc/gimple-ssa-isolate-paths.c +++ b/gcc/gimple-ssa-isolate-paths.c @@ -137,6 +137,15 @@ isolate_path (basic_block bb, basic_block duplicate, gimple_stmt_iterator si, si2; edge_iterator ei; edge e2; + bool impossible = true; + + for (si = gsi_start_bb (bb); gsi_stmt (si) != stmt; gsi_next (&si)) + if (stmt_can_terminate_bb_p (gsi_stmt (si))) + { + impossible = false; + break; + } + force_edge_cold (e, impossible); /* First duplicate BB if we have not done so already and remove all the duplicate's outgoing edges as duplicate is going to unconditionally @@ -145,10 +154,14 @@ isolate_path (basic_block bb, basic_block duplicate, if (!duplicate) { duplicate = duplicate_block (bb, NULL, NULL); + bb->frequency = 0; + bb->count = profile_count::zero (); if (!ret_zero) for (ei = ei_start (duplicate->succs); (e2 = ei_safe_edge (ei)); ) remove_edge (e2); } + bb->frequency += EDGE_FREQUENCY (e); + bb->count += e->count; /* Complete the isolation step by redirecting E to reach DUPLICATE. */ e2 = redirect_edge_and_branch (e, duplicate); |