[clang] NFC: change more places to use Type::getAsTagDecl and friends (#155313)

This changes a bunch of places which use getAs<TagType>, including
derived types, just to obtain the tag definition.

This is preparation for #155028, offloading all the changes that PR used
to introduce which don't depend on any new helpers.

1 files changed, 5 insertions, 12 deletions

diff --git a/clang/lib/Sema/SemaCUDA.cpp b/clang/lib/Sema/SemaCUDA.cpp
index fbf64d3..2e3cbb3 100644
--- a/clang/lib/Sema/SemaCUDA.cpp
+++ b/clang/lib/Sema/SemaCUDA.cpp
@@ -421,13 +421,10 @@ bool SemaCUDA::inferTargetForImplicitSpecialMember(CXXRecordDecl *ClassDecl,
   }
 
   for (const auto *B : Bases) {
-    const RecordType *BaseType = B->getType()->getAs<RecordType>();
-    if (!BaseType) {
+    auto *BaseClassDecl = B->getType()->getAsCXXRecordDecl();
+    if (!BaseClassDecl)
       continue;
-    }
 
-    CXXRecordDecl *BaseClassDecl =
-        cast<CXXRecordDecl>(BaseType->getOriginalDecl())->getDefinitionOrSelf();
     Sema::SpecialMemberOverloadResult SMOR =
         SemaRef.LookupSpecialMember(BaseClassDecl, CSM,
                                     /* ConstArg */ ConstRHS,
@@ -466,15 +463,11 @@ bool SemaCUDA::inferTargetForImplicitSpecialMember(CXXRecordDecl *ClassDecl,
       continue;
     }
 
-    const RecordType *FieldType =
-        getASTContext().getBaseElementType(F->getType())->getAs<RecordType>();
-    if (!FieldType) {
+    auto *FieldRecDecl =
+        getASTContext().getBaseElementType(F->getType())->getAsCXXRecordDecl();
+    if (!FieldRecDecl)
       continue;
-    }
 
-    CXXRecordDecl *FieldRecDecl =
-        cast<CXXRecordDecl>(FieldType->getOriginalDecl())
-            ->getDefinitionOrSelf();
     Sema::SpecialMemberOverloadResult SMOR =
         SemaRef.LookupSpecialMember(FieldRecDecl, CSM,
                                     /* ConstArg */ ConstRHS && !F->isMutable(),