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LibRegex: Add a basic optimization pass

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This currently tries to convert forking loops to atomic groups, and
unify the left side of alternations.
This commit is contained in:
Ali Mohammad Pur 2021-09-12 17:30:27 +04:30 • committed by Ali Mohammad Pur
parent 913382734c
commit 246ab432ff
9 changed files with 677 additions and 24 deletions
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3
Userland/Libraries/LibRegex/RegexMatch.h
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@ -6,6 +6,7 @@
#pragma once
#include "Forward.h"
#include "RegexOptions.h"
#include <AK/FlyString.h>
@ -514,6 +515,7 @@ struct MatchInput {
mutable Vector<size_t> saved_positions;
mutable Vector<size_t> saved_code_unit_positions;
mutable HashMap<u64, u64> checkpoints;
mutable Optional<size_t> fork_to_replace;
};
struct MatchState {
@ -522,6 +524,7 @@ struct MatchState {
size_t string_position_in_code_units { 0 };
size_t instruction_position { 0 };
size_t fork_at_position { 0 };
Optional<size_t> initiating_fork;
Vector<Match> matches;
Vector<Vector<Match>> capture_group_matches;
Vector<u64> repetition_marks;