[clang] [Analysis] Migrate away from PointerUnion::dyn_cast (NFC) (PR #122652)

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llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-clang-analysis

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 Ctx-&gt;FunArgs to be nonnull.


---
Full diff: https://github.com/llvm/llvm-project/pull/122652.diff


1 Files Affected:

- (modified) clang/lib/Analysis/ThreadSafetyCommon.cpp (+1-1) 


``````````diff
diff --git a/clang/lib/Analysis/ThreadSafetyCommon.cpp 
b/clang/lib/Analysis/ThreadSafetyCommon.cpp
index 050daee1168d4b..13cd7e26dc16f3 100644
--- a/clang/lib/Analysis/ThreadSafetyCommon.cpp
+++ b/clang/lib/Analysis/ThreadSafetyCommon.cpp
@@ -336,7 +336,7 @@ til::SExpr *SExprBuilder::translateDeclRefExpr(const 
DeclRefExpr *DRE,
               : (cast<ObjCMethodDecl>(D)->getCanonicalDecl() == Canonical)) {
         // Substitute call arguments for references to function parameters
         if (const Expr *const *FunArgs =
-                Ctx->FunArgs.dyn_cast<const Expr *const *>()) {
+                dyn_cast<const Expr *const *>(Ctx->FunArgs)) {
           assert(I < Ctx->NumArgs);
           return translate(FunArgs[I], Ctx->Prev);
         }

``````````

</details>


https://github.com/llvm/llvm-project/pull/122652
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