[clang] [clang][ExprConst] Support virtual bases in C++26 (PR #204289)

[Yihan Wang via cfe-commits]

================
@@ -321,7 +321,8 @@ class Compiler : public ConstStmtVisitor<Compiler<Emitter>, bool>,
   VarCreationState visitDecl(const VarDecl *VD);
   /// Visit an APValue.
   bool visitAPValue(const APValue &Val, PrimType ValType, SourceInfo Info);
-  bool visitAPValueInitializer(const APValue &Val, SourceInfo Info, QualType T);
+  bool visitAPValueInitializer(const APValue &Val, SourceInfo Info, QualType T,
+                               bool Toplevel = true);
----------------
yronglin wrote:

IIUC, we should rename `TopLevel` to `IsCompleteClass`? Because the function definition use `IsCompleteClass`, and `IsCompleteClass` looks more make sense.

https://github.com/llvm/llvm-project/pull/204289