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JS: fix bug in foldedComparisonEdge

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Asger F
2018-11-28 10:21:43 +00:00
parent 8fd3a417c2
commit d69e584cc2
4 changed files with 12 additions and 3 deletions
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4
javascript/ql/src/semmle/javascript/RangeAnalysis.qll
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@@ -464,8 +464,8 @@ module RangeAnalysis {
exists (DataFlow::Node k, int ksign, Bias bias, int avalue, int kvalue |
comparisonEdge(cfg, a, asign, k, ksign, bias, sharp) and
avalue = a.asExpr().getIntValue() * asign and
kvalue = b.asExpr().getIntValue() * bsign and
(avalue < kvalue + bias or sharp = true and avalue = kvalue + bias) and
kvalue = k.asExpr().getIntValue() * ksign and
(avalue > kvalue + bias or sharp = true and avalue = kvalue + bias) and
a = b and
asign = bsign and
c = -1)