From 9f165610d692d5785ab4596d7769421ae18ad4a3 Mon Sep 17 00:00:00 2001
From: Igor Klopov <igor@klopov.com>
Date: Sun, 25 Sep 2016 18:46:33 +0300
Subject: use ignition+turbofan for sourceless code


diff --git a/deps/v8/src/compiler.cc b/deps/v8/src/compiler.cc
index 9a5afe9..bf612c6 100644
--- a/deps/v8/src/compiler.cc
+++ b/deps/v8/src/compiler.cc
@@ -439,11 +439,15 @@ void EnsureFeedbackMetadata(CompilationInfo* info) {
   CHECK(!info->shared_info()->feedback_metadata()->SpecDiffersFrom(
       info->literal()->feedback_vector_spec()));
 }
 
 bool ShouldUseIgnition(CompilationInfo* info) {
-  if (!FLAG_ignition) return false;
+  ParseInfo* parse_info = info->parse_info();
+  Isolate* isolate = parse_info->isolate();
+  bool flag = FLAG_ignition || !FLAG_lazy ||
+      parse_info->script()->source()->IsUndefined(isolate);
+  if (!flag) return false;
 
   DCHECK(info->has_shared_info());
 
   // When requesting debug code as a replacement for existing code, we provide
   // the same kind as the existing code (to prevent implicit tier-change).
@@ -648,12 +652,18 @@ bool UseTurboFan(Handle<SharedFunctionInfo> shared) {
       !optimization_disabled;
 
   // 3. Explicitly enabled by the command-line filter.
   bool passes_turbo_filter = shared->PassesFilter(FLAG_turbo_filter);
 
+  // 4. Same option as in ShouldUseIgnition.
+  Isolate* isolate = shared->GetIsolate();
+  Script* script = Script::cast(shared->script());
+  bool sourceless_ignition = !FLAG_lazy ||
+      script->source()->IsUndefined(isolate);
+
   return is_turbofanable_asm || is_unsupported_by_crankshaft_but_turbofanable ||
-         passes_turbo_filter;
+         passes_turbo_filter || sourceless_ignition;
 }
 
 bool GetOptimizedCodeNow(CompilationJob* job) {
   CompilationInfo* info = job->info();
   Isolate* isolate = info->isolate();
diff --git a/deps/v8/src/flag-definitions.h b/deps/v8/src/flag-definitions.h
index e5ddbad..a3fb95c 100644
--- a/deps/v8/src/flag-definitions.h
+++ b/deps/v8/src/flag-definitions.h
@@ -425,11 +425,11 @@ DEFINE_BOOL(omit_map_checks_for_leaf_maps, true,
 
 // Flags for TurboFan.
 DEFINE_BOOL(turbo, false, "enable TurboFan compiler")
 DEFINE_IMPLICATION(turbo, turbo_asm_deoptimization)
 DEFINE_IMPLICATION(turbo, turbo_loop_peeling)
-DEFINE_BOOL(turbo_from_bytecode, false, "enable building graphs from bytecode")
+DEFINE_BOOL(turbo_from_bytecode, true, "enable building graphs from bytecode")
 DEFINE_BOOL(turbo_sp_frame_access, false,
             "use stack pointer-relative access to frame wherever possible")
 DEFINE_BOOL(turbo_preprocess_ranges, true,
             "run pre-register allocation heuristics")
 DEFINE_BOOL(turbo_loop_stackcheck, true, "enable stack checks in loops")