[clang] [AST] Migrate away from PointerUnion::dyn_cast (NFC) (PR #124074)

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llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-clang

Author: Kazu Hirata (kazutakahirata)

<details>
<summary>Changes</summary>

Note that PointerUnion::dyn_cast has been soft deprecated in
PointerUnion.h:

  // FIXME: Replace the uses of is(), get() and dyn_cast() with
  //        isa<T>, cast<T> and the llvm::dyn_cast<T>

Literal migration would result in dyn_cast_if_present (see the
definition of PointerUnion::dyn_cast), but this patch uses dyn_cast
because we expect CO to be nonnull.


---
Full diff: https://github.com/llvm/llvm-project/pull/124074.diff


1 Files Affected:

- (modified) clang/lib/AST/JSONNodeDumper.cpp (+2-2) 


``````````diff
diff --git a/clang/lib/AST/JSONNodeDumper.cpp b/clang/lib/AST/JSONNodeDumper.cpp
index ddbe2136a671f3..36ef1fc8c79db0 100644
--- a/clang/lib/AST/JSONNodeDumper.cpp
+++ b/clang/lib/AST/JSONNodeDumper.cpp
@@ -1537,9 +1537,9 @@ void JSONNodeDumper::VisitExprWithCleanups(const ExprWithCleanups *EWC) {
   if (EWC->getNumObjects()) {
     JOS.attributeArray("cleanups", [this, EWC] {
       for (const ExprWithCleanups::CleanupObject &CO : EWC->getObjects())
-        if (auto *BD = CO.dyn_cast<BlockDecl *>()) {
+        if (auto *BD = dyn_cast<BlockDecl *>(CO)) {
           JOS.value(createBareDeclRef(BD));
-        } else if (auto *CLE = CO.dyn_cast<CompoundLiteralExpr *>()) {
+        } else if (auto *CLE = dyn_cast<CompoundLiteralExpr *>(CO)) {
           llvm::json::Object Obj;
           Obj["id"] = createPointerRepresentation(CLE);
           Obj["kind"] = CLE->getStmtClassName();

``````````

</details>


https://github.com/llvm/llvm-project/pull/124074