[clang] [Sema] Migrate away from PointerUnion::dyn_cast (NFC) (PR #125023)

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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&lt;T&gt;, cast&lt;T&gt; and the llvm::dyn_cast&lt;T&gt;

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 Entry to be nonnull.


---
Full diff: https://github.com/llvm/llvm-project/pull/125023.diff


1 Files Affected:

- (modified) clang/lib/Sema/SemaDecl.cpp (+1-1) 


``````````diff
diff --git a/clang/lib/Sema/SemaDecl.cpp b/clang/lib/Sema/SemaDecl.cpp
index 3cad9827fdab69..f7b8b192a206c3 100644
--- a/clang/lib/Sema/SemaDecl.cpp
+++ b/clang/lib/Sema/SemaDecl.cpp
@@ -19966,7 +19966,7 @@ static void CheckForDuplicateEnumValues(Sema &S, 
ArrayRef<Decl *> Elements,
       continue;
 
     DeclOrVector& Entry = Iter->second;
-    if (EnumConstantDecl *D = Entry.dyn_cast<EnumConstantDecl*>()) {
+    if (EnumConstantDecl *D = dyn_cast<EnumConstantDecl *>(Entry)) {
       // Ensure constants are different.
       if (D == ECD)
         continue;

``````````

</details>


https://github.com/llvm/llvm-project/pull/125023
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