[turbofan] Do not use the self reference for turbofan functions.

src/codegen.cc

Index: src/codegen.cc
diff --git a/src/codegen.cc b/src/codegen.cc
index d4c1e438cb3654212f10476e2eeef15d44241d3e..ff6d56f4c3ff2dd04845777af40745795cfa753b 100644
--- a/src/codegen.cc
+++ b/src/codegen.cc
@@ -120,7 +120,8 @@ void CodeGenerator::MakeCodePrologue(CompilationInfo* info, const char* kind) {
 
 Handle<Code> CodeGenerator::MakeCodeEpilogue(MacroAssembler* masm,
                                              EhFrameWriter* eh_frame_writer,
-                                             CompilationInfo* info) {
+                                             CompilationInfo* info,
+                                             bool is_self_ref_available) {

[Michael Starzinger, 2016/07/13 12:42:44]

nit: We could pass in the "Handle<Object> self_reference" explicitly. WDYT?

[ahaas, 2016/07/13 12:51:54]

Done.

   Isolate* isolate = info->isolate();
 
   // Allocate and install the code.
@@ -131,11 +132,11 @@ Handle<Code> CodeGenerator::MakeCodeEpilogue(MacroAssembler* masm,
       info->IsStub();
   masm->GetCode(&desc);
   if (eh_frame_writer) eh_frame_writer->GetEhFrame(&desc);
-  Handle<Code> code =
-      isolate->factory()->NewCode(desc, flags, masm->CodeObject(),
-                                  false, is_crankshafted,
-                                  info->prologue_offset(),
-                                  info->is_debug() && !is_crankshafted);
+  Handle<Code> code = isolate->factory()->NewCode(
+      desc, flags,
+      is_self_ref_available ? masm->CodeObject() : Handle<Object>(), false,
+      is_crankshafted, info->prologue_offset(),
+      info->is_debug() && !is_crankshafted);
   isolate->counters()->total_compiled_code_size()->Increment(
       code->instruction_size());
   isolate->heap()->IncrementCodeGeneratedBytes(is_crankshafted,