[clang][bytecode] Remove bogus Initializing special case (#159933)

This doesn't seem to be needed anymore and causes problems.

Fixes #159787

Author: tbaederr

clang/lib/AST/ByteCode/Compiler.cpp

@@ -2383,13 +2383,8 @@ bool Compiler<Emitter>::VisitMemberExpr(const MemberExpr *E) {
     return this->visitDeclRef(Member, E);
   }
 
-  if (Initializing) {
-    if (!this->delegate(Base))
-      return false;
-  } else {
-    if (!this->visit(Base))
-      return false;
-  }
+  if (!this->visit(Base))
+    return false;
 
   // Base above gives us a pointer on the stack.
   const auto *FD = cast<FieldDecl>(Member);

clang/test/AST/ByteCode/cxx03.cpp

@@ -40,3 +40,9 @@ struct B2 : B {
 };
 _Static_assert(&(B2().a) == &p, ""); // both-error {{taking the address of a temporary object of type 'int'}} \
                                      // both-error {{not an integral constant expression}}
+
+typedef __attribute__((ext_vector_type(4))) int vi4b;
+struct S {
+  vi4b w;
+};
+const int s = S().w[1];