[clang][bytecode] Fix initializing primitive fields via initlist (llvm#164789)

Fixes llvm#152901

Author: tbaederr

clang/lib/AST/ByteCode/Compiler.cpp

@@ -1842,7 +1842,6 @@ bool Compiler<Emitter>::visitInitList(ArrayRef<const Expr *> Inits,
                                   const Expr *Init, PrimType T,
                                   bool Activate = false) -> bool {
       InitStackScope<Emitter> ISS(this, isa<CXXDefaultInitExpr>(Init));
-      InitLinkScope<Emitter> ILS(this, InitLink::Field(FieldToInit->Offset));
       if (!this->visit(Init))
         return false;
 

clang/test/AST/ByteCode/records.cpp

@@ -1840,3 +1840,11 @@ namespace DiamondDowncast {
   constexpr Middle2 &fail = (Middle2&)top1; // both-error {{must be initialized by a constant expression}} \
                                             // both-note {{cannot cast object of dynamic type 'const Bottom' to type 'Middle2'}}
 }
+
+namespace PrimitiveInitializedByInitList {
+  constexpr struct {
+    int a;
+    int b{this->a};
+  } c{ 17 };
+  static_assert(c.b == 17, "");
+}