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| author | Martin Liska <mliska@suse.cz> | 2022-01-24 15:45:38 +0100 |
|---|---|---|
| committer | Martin Liska <mliska@suse.cz> | 2022-11-30 14:03:43 +0100 |
| commit | 4fa25a7eb322f0a003c1eb15680c71ece345e01e (patch) | |
| tree | 52b4d065f5870abbf4215efc517ef2aacb84cbb0 /gcc/tree-switch-conversion.h | |
| parent | b628cad9e093f7a33042fb9dd647f183394eefae (diff) | |
| download | gcc-4fa25a7eb322f0a003c1eb15680c71ece345e01e.zip gcc-4fa25a7eb322f0a003c1eb15680c71ece345e01e.tar.gz gcc-4fa25a7eb322f0a003c1eb15680c71ece345e01e.tar.bz2 | |
Improve profile handling in switch lowering.
PR tree-optimization/101301
PR tree-optimization/103680
gcc/ChangeLog:
* tree-switch-conversion.cc (bit_test_cluster::emit):
Handle correctly remaining probability.
(switch_decision_tree::try_switch_expansion): Fix BB's count
where a cluster expansion happens.
(switch_decision_tree::emit_cmp_and_jump_insns): Fill up also
BB count.
(switch_decision_tree::do_jump_if_equal): Likewise.
(switch_decision_tree::emit_case_nodes): Handle special case
for BT expansion which can also fallback to a default BB.
* tree-switch-conversion.h (cluster::cluster): Add
m_default_prob probability.
Diffstat (limited to 'gcc/tree-switch-conversion.h')
| -rw-r--r-- | gcc/tree-switch-conversion.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/gcc/tree-switch-conversion.h b/gcc/tree-switch-conversion.h index 6861572..431cf1a 100644 --- a/gcc/tree-switch-conversion.h +++ b/gcc/tree-switch-conversion.h @@ -102,6 +102,10 @@ public: /* Probability of reaching subtree rooted at this node. */ profile_probability m_subtree_prob; + /* Probability of default case when reaching the node. + It is used by bit-test right now. */ + profile_probability m_default_prob; + protected: /* Default constructor. */ cluster () {} @@ -110,7 +114,8 @@ protected: cluster::cluster (tree case_label_expr, basic_block case_bb, profile_probability prob, profile_probability subtree_prob): m_case_label_expr (case_label_expr), m_case_bb (case_bb), m_prob (prob), - m_subtree_prob (subtree_prob) + m_subtree_prob (subtree_prob), + m_default_prob (profile_probability::uninitialized ()) { } @@ -545,6 +550,7 @@ public: basic_block target_bb; tree label; int bits; + profile_probability prob; /* Comparison function for qsort to order bit tests by decreasing probability of execution. */ |