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Rangeanalysis: RIP standard order.

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This commit is contained in:
Anders Schack-Mulligen
2023-11-10 15:11:15 +01:00
parent c28f54a78b
commit f05b75e04f
1 changed files with 2 additions and 22 deletions
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24
shared/rangeanalysis/codeql/rangeanalysis/RangeAnalysis.qll
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@@ -833,32 +833,12 @@ module RangeStage<
) {
exists(Sem::Expr e, D::Delta d1, D::Delta d2 |
unequalFlowStepIntegralSsa(v, pos, e, d1, reason) and
boundedUpper(e, b, d2) and
boundedLower(e, b, d2) and
bounded(e, b, d2, true, _, _, _) and
bounded(e, b, d2, false, _, _, _) and
delta = D::fromFloat(D::toFloat(d1) + D::toFloat(d2))
)
}
/**
* Holds if `b + delta` is an upper bound for `e`.
*
* This predicate only exists to prevent a bad standard order in `unequalIntegralSsa`.
*/
pragma[nomagic]
private predicate boundedUpper(Sem::Expr e, SemBound b, D::Delta delta) {
bounded(e, b, delta, true, _, _, _)
}
/**
* Holds if `b + delta` is a lower bound for `e`.
*
* This predicate only exists to prevent a bad standard order in `unequalIntegralSsa`.
*/
pragma[nomagic]
private predicate boundedLower(Sem::Expr e, SemBound b, D::Delta delta) {
bounded(e, b, delta, false, _, _, _)
}
/** Weakens a delta to lie in the range `[-1..1]`. */
bindingset[delta, upper]
private D::Delta weakenDelta(boolean upper, D::Delta delta) {