[clang] [analyzer] Support determining origins in a conditional operator in WebKit checkers. (PR #91143)

[Ryosuke Niwa via cfe-commits]

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@@ -27,12 +28,18 @@ tryToFindPtrOrigin(const Expr *E, bool StopAtFirstRefCountedObj) {
       E = tempExpr->getSubExpr();
       continue;
     }
+    if (auto *Expr = dyn_cast<ConditionalOperator>(E)) {
+      return tryToFindPtrOrigin(Expr->getTrueExpr(), StopAtFirstRefCountedObj,
+                                callback) &&
+             tryToFindPtrOrigin(Expr->getFalseExpr(), StopAtFirstRefCountedObj,
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rniwa wrote:

So the model is that we'd recurse for each expression. We'd stop at the first appearance of Ref/RefPtr if StopAtFirstRefCountedObj is set. Whether that semantics is correct or not depends on the context in which this function is called / used.

https://github.com/llvm/llvm-project/pull/91143