[clang] [AST] Migrate away from PointerUnion::dyn_cast (NFC) (PR #123156)

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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 IntegerType to be nonnull.


---
Full diff: https://github.com/llvm/llvm-project/pull/123156.diff


1 Files Affected:

- (modified) clang/include/clang/AST/Decl.h (+1-1) 


``````````diff
diff --git a/clang/include/clang/AST/Decl.h b/clang/include/clang/AST/Decl.h
index 27a91a2d07210b..186a3e7fca59db 100644
--- a/clang/include/clang/AST/Decl.h
+++ b/clang/include/clang/AST/Decl.h
@@ -4021,7 +4021,7 @@ class EnumDecl : public TagDecl {
   QualType getIntegerType() const {
     if (!IntegerType)
       return QualType();
-    if (const Type *T = IntegerType.dyn_cast<const Type*>())
+    if (const Type *T = dyn_cast<const Type *>(IntegerType))
       return QualType(T, 0);
     return cast<TypeSourceInfo *>(IntegerType)->getType().getUnqualifiedType();
   }

``````````

</details>


https://github.com/llvm/llvm-project/pull/123156
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