[clang] [clang][Sema] Recheck array size once the element type is complete (PR #219817)

[Erich Keane via cfe-commits]

================
@@ -9688,6 +9688,28 @@ static void assignInheritanceModel(Sema &S, CXXRecordDecl *RD) {
   }
 }
 
+/// Return the (possibly nested) constant array type in \p T whose size cannot
+/// be represented, if any. BuildArrayType can only check the element count if
+/// the element type is still incomplete when the array type is formed.
+static const ConstantArrayType *findArrayTypeTooLarge(const ASTContext &Context,
----------------
erichkeane wrote:

this name is super weird/inconsistent with our naming of things?  Don't do that...  And better describe what it is doing.

https://github.com/llvm/llvm-project/pull/219817