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Regex: directly store instruction pointer in Thread struct

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This commit is contained in:
Maxime Coste 2017-11-11 15:15:13 +08:00
parent add7f7e76b
commit c9b43d3634
1 changed files with 10 additions and 9 deletions
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19
src/regex_impl.hh
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@ -158,7 +158,7 @@ public:
if (search)
to_next_start(start, m_end, m_program.start_chars.get());
return exec_program(start, Thread{search ? (uint16_t)0 : CompiledRegex::search_prefix_size, nullptr});
return exec_program(start, Thread{&m_program.instructions[search ? 0 : CompiledRegex::search_prefix_size], nullptr});
}
ArrayView<const Iterator> captures() const
@ -216,7 +216,7 @@ private:
struct Thread
{
uint32_t inst;
const CompiledRegex::Instruction* inst;
Saves* saves;
};
@ -237,9 +237,10 @@ private:
StepResult step(Utf8It& pos, Thread& thread, ExecState& state)
{
const bool no_saves = (m_flags & RegexExecFlags::NoSaves);
auto* instructions = m_program.instructions.data();
while (true)
{
auto& inst = m_program.instructions[thread.inst++];
auto& inst = *thread.inst++;
if (inst.last_step == state.step)
return StepResult::Failed;
inst.last_step = state.step;
@ -257,13 +258,13 @@ private:
case CompiledRegex::AnyChar:
return StepResult::Consumed;
case CompiledRegex::Jump:
thread.inst = inst.param;
thread.inst = instructions + inst.param;
break;
case CompiledRegex::Split_PrioritizeParent:
{
if (thread.saves)
++thread.saves->refcount;
state.current_threads.push_back({inst.param, thread.saves});
state.current_threads.push_back({instructions + inst.param, thread.saves});
break;
}
case CompiledRegex::Split_PrioritizeChild:
@ -271,7 +272,7 @@ private:
if (thread.saves)
++thread.saves->refcount;
state.current_threads.push_back({thread.inst, thread.saves});
thread.inst = inst.param;
thread.inst = instructions + inst.param;
break;
}
case CompiledRegex::Save:
@ -397,12 +398,12 @@ private:
release_saves(thread.saves);
break;
case StepResult::Consumed:
if (m_program.instructions[thread.inst].scheduled)
if (thread.inst->scheduled)
{
release_saves(thread.saves);
continue;
}
m_program.instructions[thread.inst].scheduled = true;
thread.inst->scheduled = true;
state.next_threads.push_back(thread);
break;
case StepResult::FindNextStart:
@ -412,7 +413,7 @@ private:
}
}
for (auto& thread : state.next_threads)
m_program.instructions[thread.inst].scheduled = false;
thread.inst->scheduled = false;
if (pos == m_end or state.next_threads.empty() or
(found_match and (m_flags & RegexExecFlags::AnyMatch)))