[es6] Tail calls support.

src/crankshaft/arm64/lithium-codegen-arm64.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.
 
 #include "src/crankshaft/arm64/lithium-codegen-arm64.h"
 
 #include "src/arm64/frames-arm64.h"
 #include "src/base/bits.h"
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
@@ skipping 348 matching lines @@
   if ((code->kind() == Code::BINARY_OP_IC) ||
       (code->kind() == Code::COMPARE_IC)) {
     // Signal that we don't inline smi code before these stubs in the
     // optimizing code generator.
     InlineSmiCheckInfo::EmitNotInlined(masm());
   }
 }
 
 
 void LCodeGen::DoCallFunction(LCallFunction* instr) {
+  HCallFunction* hinstr = instr->hydrogen();
   DCHECK(ToRegister(instr->context()).is(cp));
   DCHECK(ToRegister(instr->function()).Is(x1));
   DCHECK(ToRegister(instr->result()).Is(x0));
 
   int arity = instr->arity();
-  ConvertReceiverMode mode = instr->hydrogen()->convert_mode();
-  if (instr->hydrogen()->HasVectorAndSlot()) {
+  ConvertReceiverMode mode = hinstr->convert_mode();
+  TailCallMode tail_call_mode = hinstr->tail_call_mode();
+  if (hinstr->HasVectorAndSlot()) {
     Register slot_register = ToRegister(instr->temp_slot());
     Register vector_register = ToRegister(instr->temp_vector());
     DCHECK(slot_register.is(x3));
     DCHECK(vector_register.is(x2));
 
     AllowDeferredHandleDereference vector_structure_check;
-    Handle<TypeFeedbackVector> vector = instr->hydrogen()->feedback_vector();
-    int index = vector->GetIndex(instr->hydrogen()->slot());
+    Handle<TypeFeedbackVector> vector = hinstr->feedback_vector();
+    int index = vector->GetIndex(hinstr->slot());
 
     __ Mov(vector_register, vector);
     __ Mov(slot_register, Operand(Smi::FromInt(index)));
 
-    Handle<Code> ic =
-        CodeFactory::CallICInOptimizedCode(isolate(), arity, mode).code();
+    Handle<Code> ic = CodeFactory::CallICInOptimizedCode(isolate(), arity, mode,
+                                                         tail_call_mode)
+                          .code();
     CallCode(ic, RelocInfo::CODE_TARGET, instr);
   } else {
     __ Mov(x0, arity);
-    CallCode(isolate()->builtins()->Call(mode), RelocInfo::CODE_TARGET, instr);
+    CallCode(isolate()->builtins()->Call(mode, tail_call_mode),
+             RelocInfo::CODE_TARGET, instr);
   }
-  RecordPushedArgumentsDelta(instr->hydrogen()->argument_delta());
+  RecordPushedArgumentsDelta(hinstr->argument_delta());
 }
 
 
 void LCodeGen::DoCallNewArray(LCallNewArray* instr) {
   DCHECK(instr->IsMarkedAsCall());
   DCHECK(ToRegister(instr->context()).is(cp));
   DCHECK(ToRegister(instr->constructor()).is(x1));
 
   __ Mov(x0, Operand(instr->arity()));
   if (instr->arity() == 1) {
@@ skipping 5354 matching lines @@
   Handle<ScopeInfo> scope_info = instr->scope_info();
   __ Push(scope_info);
   __ Push(ToRegister(instr->function()));
   CallRuntime(Runtime::kPushBlockContext, instr);
   RecordSafepoint(Safepoint::kNoLazyDeopt);
 }
 
 
 }  // namespace internal
 }  // namespace v8