[clang] [analyzer] Suppress out of bounds reports after weak loop assumptions (PR #109804)

[Balazs Benics via cfe-commits]

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=?utf-8?q?Donát?= Nagy <donat.nagy at ericsson.com>,
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In-Reply-To: <llvm.org/llvm/llvm-project/pull/109804 at github.com>


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@@ -212,6 +212,25 @@ typedef llvm::ImmutableMap<const LocationContext *, unsigned>
 REGISTER_TRAIT_WITH_PROGRAMSTATE(PendingArrayDestruction,
                                  PendingArrayDestructionMap)
 
+// This trait is used to heuristically filter out results produced from
+// execution paths that took "weak" assumptions within a loop.
+REGISTER_TRAIT_WITH_PROGRAMSTATE(SeenWeakLoopAssumption, bool)
+
+ProgramStateRef clang::ento::recordWeakLoopAssumption(ProgramStateRef State) {
+  return State->set<SeenWeakLoopAssumption>(true);
+}
+
+bool clang::ento::seenWeakLoopAssumption(ProgramStateRef State) {
+  return State->get<SeenWeakLoopAssumption>();
+}
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steakhal wrote:

There is nothing to be removed here as this trait is a `bool`.

https://github.com/llvm/llvm-project/pull/109804