[es6] Tail calls support.

src/crankshaft/arm/lithium-codegen-arm.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/crankshaft/arm/lithium-codegen-arm.h"
 
 #include "src/base/bits.h"
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
 #include "src/crankshaft/arm/lithium-gap-resolver-arm.h"
@@ skipping 3694 matching lines @@
 
   // Load the code entry address
   __ ldr(ip, FieldMemOperand(r1, JSFunction::kCodeEntryOffset));
   __ Call(ip);
 
   RecordSafepointWithLazyDeopt(instr, RECORD_SIMPLE_SAFEPOINT);
 }
 
 
 void LCodeGen::DoCallFunction(LCallFunction* instr) {
+  HCallFunction* hinstr = instr->hydrogen();
   DCHECK(ToRegister(instr->context()).is(cp));
   DCHECK(ToRegister(instr->function()).is(r1));
   DCHECK(ToRegister(instr->result()).is(r0));
 
   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(r3));
     DCHECK(vector_register.is(r2));
 
     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());
 
     __ Move(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(r0, Operand(arity));
-    CallCode(isolate()->builtins()->Call(mode), RelocInfo::CODE_TARGET, instr);
+    CallCode(isolate()->builtins()->Call(mode, tail_call_mode),
+             RelocInfo::CODE_TARGET, instr);
   }
 }
 
 
 void LCodeGen::DoCallNewArray(LCallNewArray* instr) {
   DCHECK(ToRegister(instr->context()).is(cp));
   DCHECK(ToRegister(instr->constructor()).is(r1));
   DCHECK(ToRegister(instr->result()).is(r0));
 
   __ mov(r0, Operand(instr->arity()));
@@ skipping 1828 matching lines @@
   __ push(ToRegister(instr->function()));
   CallRuntime(Runtime::kPushBlockContext, instr);
   RecordSafepoint(Safepoint::kNoLazyDeopt);
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8