intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 65 insertions, 0 deletions

diff --git a/contrib/libs/hyperscan/src/nfagraph/ng_edge_redundancy.h b/contrib/libs/hyperscan/src/nfagraph/ng_edge_redundancy.h
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+/*
+ * Copyright (c) 2015, Intel Corporation
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *  * Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  * Neither the name of Intel Corporation nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** \file
+ * \brief Edge redundancy graph reductions.
+ */
+#ifndef NG_EDGE_REDUNDANCY_H
+#define NG_EDGE_REDUNDANCY_H
+
+#include "som/som.h"
+
+namespace ue2 {
+
+class NGHolder;
+struct CompileContext;
+
+/** \brief Entry point: Runs all the edge redundancy passes. */
+bool removeEdgeRedundancy(NGHolder &g, som_type som, const CompileContext &cc);
+
+/** \brief Removes optional stuff from the front of floating patterns, since
+ * it's redundant with startDs.
+ *
+ * For each successor of startDs, remove any in-edges that aren't from either
+ * start or startDs. This allows us to prune redundant vertices at the start of
+ * a pattern:
+ *
+ *     /(hat)?stand --> /stand/
+ *
+ */
+bool removeSiblingsOfStartDotStar(NGHolder &g);
+
+/** \brief Removes all edges into virtual starts other than those from
+ * start/startDs, providing there is an edge from startDs.
+ *
+ * This operation is an optimisation for SOM mode. (see UE-1544) */
+bool optimiseVirtualStarts(NGHolder &g);
+
+} // namespace ue2
+
+#endif