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

src/codegen.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/codegen.h"
 
 #if defined(V8_OS_AIX)
 #include <fenv.h>  // NOLINT(build/c++11)
 #endif
 #include "src/ast/prettyprinter.h"
@@ skipping 102 matching lines @@
 
   if (info->parse_info() && print_ast) {
     PrintF("--- AST ---\n%s\n",
            AstPrinter(info->isolate()).PrintProgram(info->literal()));
   }
 #endif  // DEBUG
 }
 
 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.
   CodeDesc desc;
   Code::Flags flags = info->code_flags();
   bool is_crankshafted =
       Code::ExtractKindFromFlags(flags) == Code::OPTIMIZED_FUNCTION ||
       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,
       code->instruction_size());
   return code;
 }
 
 
 void CodeGenerator::PrintCode(Handle<Code> code, CompilationInfo* info) {
 #ifdef ENABLE_DISASSEMBLER
@@ skipping 47 matching lines @@
       os << "source_position = " << shared->start_position() << "\n";
     }
     code->Disassemble(debug_name.get(), os);
     os << "--- End code ---\n";
   }
 #endif  // ENABLE_DISASSEMBLER
 }
 
 }  // namespace internal
 }  // namespace v8