diff options
| author | Jan Hubicka <jh@suse.cz> | 2013-09-04 16:14:28 +0200 |
|---|---|---|
| committer | Jan Hubicka <hubicka@gcc.gnu.org> | 2013-09-04 14:14:28 +0000 |
| commit | 61a74079b01d0229d95f14d160bcbe6c4f88147f (patch) | |
| tree | 37a2f18b9ddc64a6fda6a6cc4c075c72734d0ce7 /gcc/predict.c | |
| parent | 24ba81955d92ff8c29f814867b887446f5c0be05 (diff) | |
| download | gcc-61a74079b01d0229d95f14d160bcbe6c4f88147f.zip gcc-61a74079b01d0229d95f14d160bcbe6c4f88147f.tar.gz gcc-61a74079b01d0229d95f14d160bcbe6c4f88147f.tar.bz2 | |
Makefile.in (ipa-devirt.o): Add dependency on diagnostic.h
* Makefile.in (ipa-devirt.o): Add dependency on diagnostic.h
* ipa-devirt.c: Include diganostic.h
(odr_type_d): Add types and types_set.
(hash_type_name): Work for types with vtables during LTO.
(odr_hasher::remove): Fix comment; destroy types_set.
(add_type_duplicate): New function,
(get_odr_type): Use it.
(dump_type_inheritance_graph): Dump type duplicates.
* ipa.c (symtab_remove_unreachable_nodes): Build type inheritance
graph.
* tree.c (types_same_for_odr): Give exact answers on types with
virtual tables.
From-SVN: r202258
Diffstat (limited to 'gcc/predict.c')
| -rw-r--r-- | gcc/predict.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/gcc/predict.c b/gcc/predict.c index 06da1cd..ddf72d2 100644 --- a/gcc/predict.c +++ b/gcc/predict.c @@ -232,8 +232,22 @@ bool probably_never_executed_bb_p (struct function *fun, const_basic_block bb) { gcc_checking_assert (fun); - if (profile_info && flag_branch_probabilities) - return ((bb->count + profile_info->runs / 2) / profile_info->runs) == 0; + if (profile_status_for_function (fun) == PROFILE_READ) + { + if ((bb->count * 4 + profile_info->runs / 2) / profile_info->runs > 0) + return false; + if (!bb->frequency) + return true; + if (!ENTRY_BLOCK_PTR->frequency) + return false; + if (ENTRY_BLOCK_PTR->count && ENTRY_BLOCK_PTR->count < REG_BR_PROB_BASE) + { + return (RDIV (bb->frequency * ENTRY_BLOCK_PTR->count, + ENTRY_BLOCK_PTR->frequency) + < REG_BR_PROB_BASE / 4); + } + return true; + } if ((!profile_info || !flag_branch_probabilities) && (cgraph_get_node (fun->decl)->frequency == NODE_FREQUENCY_UNLIKELY_EXECUTED)) |