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ng_dominators: use a vector for doms internally

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This commit is contained in:
Justin Viiret 2017-03-13 15:18:12 +11:00 committed by Matthew Barr
parent 5005d50050
commit 8a6b38a9b5
1 changed files with 9 additions and 7 deletions
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16
src/nfagraph/ng_dominators.cpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2015-2016, Intel Corporation
* Copyright (c) 2015-2017, Intel Corporation
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
@ -62,8 +62,8 @@ unordered_map<NFAVertex, NFAVertex> calcDominators(const Graph &g,
vector<Vertex> vertices_by_dfnum(num_verts, Graph::null_vertex());
// Output map.
unordered_map<Vertex, Vertex> doms;
auto dom_map = make_assoc_property_map(doms);
vector<Vertex> doms(num_verts, Graph::null_vertex());
auto dom_map = make_iterator_property_map(doms.begin(), index_map);
boost_ue2::lengauer_tarjan_dominator_tree(g, source, index_map, dfnum_map,
parent_map, vertices_by_dfnum,
@ -71,10 +71,12 @@ unordered_map<NFAVertex, NFAVertex> calcDominators(const Graph &g,
/* Translate back to an NFAVertex map */
unordered_map<NFAVertex, NFAVertex> doms2;
for (const auto &e : doms) {
NFAVertex f(e.first);
NFAVertex s(e.second);
doms2[f] = s;
doms2.reserve(num_verts);
for (auto v : vertices_range(g)) {
auto dom_of_v = doms[g[v].index];
if (dom_of_v) {
doms2.emplace(v, dom_of_v);
}
}
return doms2;
}