[stubs] Port ToName stub to TurboFan.

src/code-stub-assembler.cc

 // Copyright 2016 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/code-stub-assembler.h"
 #include "src/code-factory.h"
 #include "src/frames-inl.h"
 #include "src/frames.h"
 #include "src/ic/handler-configuration.h"
 #include "src/ic/stub-cache.h"
@@ skipping 2196 matching lines @@
         MachineRepresentation::kWord16, result,
         IntPtrConstant(SeqTwoByteString::kHeaderSize - kHeapObjectTag), code);
     var_result.Bind(result);
     Goto(&if_done);
   }
 
   Bind(&if_done);
   return var_result.value();
 }
 
+Node* CodeStubAssembler::ToName(Node* context, Node* value) {
+  typedef CodeStubAssembler::Label Label;
+  typedef CodeStubAssembler::Variable Variable;
+
+  Label end(this);
+  Variable var_result(this, MachineRepresentation::kTagged);
+
+  Label is_number(this);
+  GotoIf(WordIsSmi(value), &is_number);
+
+  Label not_name(this);
+  Node* value_instance_type = LoadInstanceType(value);
+  STATIC_ASSERT(FIRST_NAME_TYPE == FIRST_TYPE);
+  GotoIf(Int32GreaterThan(value_instance_type, Int32Constant(LAST_NAME_TYPE)),
+         &not_name);
+
+  var_result.Bind(value);
+  Goto(&end);
+
+  Bind(&is_number);
+  {
+    Callable callable = CodeFactory::NumberToString(isolate());
+    var_result.Bind(CallStub(callable, context, value));
+    Goto(&end);
+  }
+
+  Bind(&not_name);
+  {
+    GotoIf(Word32Equal(value_instance_type, Int32Constant(HEAP_NUMBER_TYPE)),
+           &is_number);
+
+    Label not_oddball(this);
+    GotoIf(Word32NotEqual(value_instance_type, Int32Constant(ODDBALL_TYPE)),
+           &not_oddball);
+
+    var_result.Bind(LoadObjectField(value, Oddball::kToStringOffset));
+    Goto(&end);
+
+    Bind(&not_oddball);
+    {
+      var_result.Bind(CallRuntime(Runtime::kToName, context, value));
+      Goto(&end);
+    }
+  }
+
+  Bind(&end);
+  return var_result.value();
+}
+
 Node* CodeStubAssembler::BitFieldDecode(Node* word32, uint32_t shift,
                                         uint32_t mask) {
   return Word32Shr(Word32And(word32, Int32Constant(mask)),
                    static_cast<int>(shift));
 }
 
 void CodeStubAssembler::SetCounter(StatsCounter* counter, int value) {
   if (FLAG_native_code_counters && counter->Enabled()) {
     Node* counter_address = ExternalConstant(ExternalReference(counter));
     StoreNoWriteBarrier(MachineRepresentation::kWord32, counter_address,
@@ skipping 1983 matching lines @@
                        Heap::kTheHoleValueRootIndex);
 
   // Store the WeakCell in the feedback vector.
   StoreFixedArrayElement(feedback_vector, slot, cell, UPDATE_WRITE_BARRIER,
                          CodeStubAssembler::SMI_PARAMETERS);
   return cell;
 }
 
 }  // namespace internal
 }  // namespace v8