[test] Fix %PrepareFunctionForOptimization() vs bytecode flushing

Ensure the bytecode array is available, before we put it to the
PendingOptimizationTable.

Bug: v8:12416
Change-Id: Ie4eb1a8a2ebdcdc0cfbfd7884eb081e156635a59
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3313108
Auto-Submit: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/main@{#78293}

src/codegen/pending-optimization-table.cc

@@ -30,6 +30,11 @@ void PendingOptimizationTable::PreparedForOptimization(
   if (allow_heuristic_optimization) {
     status |= FunctionStatus::kAllowHeuristicOptimization;
   }
+  Handle<SharedFunctionInfo> shared_info(function->shared(), isolate);
+
+  IsCompiledScope is_compiled_scope;
+  SharedFunctionInfo::EnsureBytecodeArrayAvailable(isolate, shared_info,
+                                                   &is_compiled_scope);
 
   Handle<ObjectHashTable> table =
       isolate->heap()->pending_optimize_for_test_bytecode().IsUndefined()
@@ -38,7 +43,7 @@ void PendingOptimizationTable::PreparedForOptimization(
                        isolate->heap()->pending_optimize_for_test_bytecode()),
                    isolate);
   Handle<Tuple2> tuple = isolate->factory()->NewTuple2(
-      handle(function->shared().GetBytecodeArray(isolate), isolate),
+      handle(shared_info->GetBytecodeArray(isolate), isolate),
       handle(Smi::FromInt(status), isolate), AllocationType::kYoung);
   table =
       ObjectHashTable::Put(table, handle(function->shared(), isolate), tuple);