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ng_violet: fix non-determinism in splitEdgesByCut

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This commit is contained in:
Justin Viiret 2016-07-27 09:29:39 +10:00 committed by Matthew Barr
parent 151810b4fc
commit a8cceeeddc
1 changed files with 10 additions and 9 deletions
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15
src/nfagraph/ng_violet.cpp
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@ -1127,17 +1127,18 @@ void splitEdgesByCut(NGHolder &h, RoseInGraph &vg,
const vector<RoseInEdge> &to_cut,
const vector<NFAEdge> &cut,
const map<NFAEdge, set<ue2_literal>> &cut_lits) {
set<RoseInVertex> sources;
for (const RoseInEdge &ve : to_cut) {
assert(&h == &*vg[ve].graph);
sources.insert(source(ve, vg));
}
DEBUG_PRINTF("splitting %s:\n", to_string(h.kind).c_str());
/* create literal vertices and connect preds */
unordered_set<RoseInVertex> done_sources;
map<RoseInVertex, vector<pair<RoseInVertex, NFAVertex>>> verts_by_source;
for (RoseInVertex src : sources) {
for (const RoseInEdge &ve : to_cut) {
assert(&h == &*vg[ve].graph);
RoseInVertex src = source(ve, vg);
if (!done_sources.insert(src).second) {
continue; /* already processed */
}
/* iterate over cut for determinism */
for (const auto &e : cut) {
NFAVertex prev_v = source(e, h);