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DFA: use sherman economically

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Hong, Yang A
2020-06-18 09:48:52 +00:00
committed by Konstantinos Margaritis
parent 7d21fc157c
commit d71515be04
2 changed files with 30 additions and 23 deletions
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28
src/nfa/mcclellancompile.cpp
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@@ -1,5 +1,5 @@
/*
* Copyright (c) 2015-2018, Intel Corporation
* Copyright (c) 2015-2020, Intel Corporation
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
@@ -1477,6 +1477,7 @@ bytecode_ptr<NFA> mcclellanCompile_i(raw_dfa &raw, accel_dfa_build_strat &strat,
bytecode_ptr<NFA> nfa;
if (!using8bit) {
// Wide state optimization
if (cc.grey.allowWideStates && strat.getType() == McClellan
&& !is_triggered(raw.kind)) {
find_wide_state(info);
@@ -1486,19 +1487,22 @@ bytecode_ptr<NFA> mcclellanCompile_i(raw_dfa &raw, accel_dfa_build_strat &strat,
bool any_cyclic_near_anchored_state
= is_cyclic_near(raw, raw.start_anchored);
for (u32 i = 0; i < info.size(); i++) {
if (info.is_widestate(i)) {
continue;
// Sherman optimization
if (info.impl_alpha_size > 16) {
for (u32 i = 0; i < info.size(); i++) {
if (info.is_widestate(i)) {
continue;
}
find_better_daddy(info, i, using8bit,
any_cyclic_near_anchored_state,
trust_daddy_states, cc.grey);
total_daddy += info.extra[i].daddytaken;
}
find_better_daddy(info, i, using8bit,
any_cyclic_near_anchored_state,
trust_daddy_states, cc.grey);
total_daddy += info.extra[i].daddytaken;
}
DEBUG_PRINTF("daddy %hu/%zu states=%zu alpha=%hu\n", total_daddy,
info.size() * info.impl_alpha_size, info.size(),
info.impl_alpha_size);
DEBUG_PRINTF("daddy %hu/%zu states=%zu alpha=%hu\n", total_daddy,
info.size() * info.impl_alpha_size, info.size(),
info.impl_alpha_size);
}
nfa = mcclellanCompile16(info, cc, accel_states);
} else {