[es6] Tail calls support.

src/x64/code-stubs-x64.cc

 // Copyright 2013 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.
 
 #if V8_TARGET_ARCH_X64
 
 #include "src/bootstrapper.h"
 #include "src/code-stubs.h"
 #include "src/codegen.h"
 #include "src/ic/handler-compiler.h"
@@ skipping 1984 matching lines @@
   // convincing us that we have a monomorphic JSFunction.
   __ JumpIfSmi(rdi, &extra_checks_or_miss);
 
   // Increment the call count for monomorphic function calls.
   __ SmiAddConstant(FieldOperand(rbx, rdx, times_pointer_size,
                                  FixedArray::kHeaderSize + kPointerSize),
                     Smi::FromInt(CallICNexus::kCallCountIncrement));
 
   __ bind(&call_function);
   __ Set(rax, argc);
-  __ Jump(masm->isolate()->builtins()->CallFunction(convert_mode()),
+  __ Jump(masm->isolate()->builtins()->CallFunction(convert_mode(),
+                                                    tail_call_mode()),
           RelocInfo::CODE_TARGET);
 
   __ bind(&extra_checks_or_miss);
   Label uninitialized, miss, not_allocation_site;
 
   __ Cmp(rcx, TypeFeedbackVector::MegamorphicSentinel(isolate));
   __ j(equal, &call);
 
   // Check if we have an allocation site.
   __ CompareRoot(FieldOperand(rcx, HeapObject::kMapOffset),
@@ skipping 17 matching lines @@
   // We are going megamorphic. If the feedback is a JSFunction, it is fine
   // to handle it here. More complex cases are dealt with in the runtime.
   __ AssertNotSmi(rcx);
   __ CmpObjectType(rcx, JS_FUNCTION_TYPE, rcx);
   __ j(not_equal, &miss);
   __ Move(FieldOperand(rbx, rdx, times_pointer_size, FixedArray::kHeaderSize),
           TypeFeedbackVector::MegamorphicSentinel(isolate));
 
   __ bind(&call);
   __ Set(rax, argc);
-  __ Jump(masm->isolate()->builtins()->Call(convert_mode()),
+  __ Jump(masm->isolate()->builtins()->Call(convert_mode(), tail_call_mode()),
           RelocInfo::CODE_TARGET);
 
   __ bind(&uninitialized);
 
   // We are going monomorphic, provided we actually have a JSFunction.
   __ JumpIfSmi(rdi, &miss);
 
   // Goto miss case if we do not have a function.
   __ CmpObjectType(rdi, JS_FUNCTION_TYPE, rcx);
   __ j(not_equal, &miss);
@@ skipping 3406 matching lines @@
                            NULL);
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X64