Reland: [clang] NFC: Clear some uses of MemberPointerType::getClass (#132317)

Relands Original PR: https://github.com/llvm/llvm-project/pull/131965
Addresses
https://github.com/llvm/llvm-project/pull/131965#issuecomment-2741619498
* Fixes isIncompleteType for injected classes

This clears up some uses of getClass on MemberPointerType when
equivalent uses of getMostRecentCXXRecordDecl would be just as simple or
simpler.
    
This is split-off from a larger patch which removes getClass, in order
to facilitate review.

1 files changed, 1 insertions, 4 deletions

diff --git a/clang-tools-extra/clang-tidy/bugprone/ComparePointerToMemberVirtualFunctionCheck.cpp b/clang-tools-extra/clang-tidy/bugprone/ComparePointerToMemberVirtualFunctionCheck.cpp
index 9d1d92b..a8a9e6b 100644
--- a/clang-tools-extra/clang-tidy/bugprone/ComparePointerToMemberVirtualFunctionCheck.cpp
+++ b/clang-tools-extra/clang-tidy/bugprone/ComparePointerToMemberVirtualFunctionCheck.cpp
@@ -70,10 +70,7 @@ void ComparePointerToMemberVirtualFunctionCheck::check(
   // compare with variable which type is pointer to member function.
   llvm::SmallVector<SourceLocation, 12U> SameSignatureVirtualMethods{};
   const auto *MPT = cast<MemberPointerType>(DRE->getType().getCanonicalType());
-  const Type *T = MPT->getClass();
-  if (T == nullptr)
-    return;
-  const CXXRecordDecl *RD = T->getAsCXXRecordDecl();
+  const CXXRecordDecl *RD = MPT->getMostRecentCXXRecordDecl();
   if (RD == nullptr)
     return;