[clang] [CodeGen] Migrate away from PointerUnion::dyn_cast (NFC) (PR #122653)

[Kazu Hirata via cfe-commits]

https://github.com/kazutakahirata created https://github.com/llvm/llvm-project/pull/122653

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 Prototype.P to be nonnull.


>From 32bbbb9b28718f839e6005fe591a8727838f3684 Mon Sep 17 00:00:00 2001
From: Kazu Hirata <kazu at google.com>
Date: Sun, 12 Jan 2025 14:42:34 -0800
Subject: [PATCH] [CodeGen] Migrate away from PointerUnion::dyn_cast (NFC)

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 Prototype.P to be nonnull.
---
 clang/lib/CodeGen/CGCall.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/clang/lib/CodeGen/CGCall.cpp b/clang/lib/CodeGen/CGCall.cpp
index 0fde4d8ee296bd..a71af0141709fd 100644
--- a/clang/lib/CodeGen/CGCall.cpp
+++ b/clang/lib/CodeGen/CGCall.cpp
@@ -4507,7 +4507,7 @@ void CodeGenFunction::EmitCallArgs(
   // First, if a prototype was provided, use those argument types.
   bool IsVariadic = false;
   if (Prototype.P) {
-    const auto *MD = Prototype.P.dyn_cast<const ObjCMethodDecl *>();
+    const auto *MD = dyn_cast_if_present<const ObjCMethodDecl *>(Prototype.P);
     if (MD) {
       IsVariadic = MD->isVariadic();
       ExplicitCC = getCallingConventionForDecl(