[turbofan] BytecodeGraphBuilder was incorrectly tenuring most CreateClosure allocations

R=bmeurer@chromium.org, rmcilroy@chromium.org

Review-Url: https://codereview.chromium.org/2309203002
Cr-Commit-Position: refs/heads/master@{#39148}

src/compiler/bytecode-graph-builder.cc

@@ -922,7 +922,10 @@ void BytecodeGraphBuilder::VisitCreateClosure() {
   Handle<SharedFunctionInfo> shared_info = Handle<SharedFunctionInfo>::cast(
       bytecode_iterator().GetConstantForIndexOperand(0));
   PretenureFlag tenured =
-      bytecode_iterator().GetFlagOperand(1) ? TENURED : NOT_TENURED;
+      interpreter::CreateClosureFlags::PretenuredBit::decode(
+          bytecode_iterator().GetFlagOperand(1))
+          ? TENURED
+          : NOT_TENURED;
   const Operator* op = javascript()->CreateClosure(shared_info, tenured);
   Node* closure = NewNode(op);
   environment()->BindAccumulator(closure);