[builtins] implement Array.prototype[@@iterator] in TFJ builtins

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 1023 matching lines @@
 Node* CodeStubAssembler::LoadFixedArrayElement(Node* object, Node* index_node,
                                                int additional_offset,
                                                ParameterMode parameter_mode) {
   int32_t header_size =
       FixedArray::kHeaderSize + additional_offset - kHeapObjectTag;
   Node* offset = ElementOffsetFromIndex(index_node, FAST_HOLEY_ELEMENTS,
                                         parameter_mode, header_size);
   return Load(MachineType::AnyTagged(), object, offset);
 }
 
+Node* CodeStubAssembler::LoadFixedTypedArrayElement(
+    Node* data_pointer, Node* index_node, ElementsKind elements_kind,
+    ParameterMode parameter_mode) {
+  Node* offset =
+      ElementOffsetFromIndex(index_node, elements_kind, parameter_mode, 0);
+  MachineType type;
+  switch (elements_kind) {
+    case UINT8_ELEMENTS: /* fall through */
+    case UINT8_CLAMPED_ELEMENTS:
+      type = MachineType::Uint8();
+      break;
+    case INT8_ELEMENTS:
+      type = MachineType::Int8();
+      break;
+    case UINT16_ELEMENTS:
+      type = MachineType::Uint16();
+      break;
+    case INT16_ELEMENTS:
+      type = MachineType::Int16();
+      break;
+    case UINT32_ELEMENTS:
+      type = MachineType::Uint32();
+      break;
+    case INT32_ELEMENTS:
+      type = MachineType::Int32();
+      break;
+    case FLOAT32_ELEMENTS:
+      type = MachineType::Float32();
+      break;
+    case FLOAT64_ELEMENTS:
+      type = MachineType::Float64();
+      break;
+    default:
+      UNREACHABLE();
+  }
+  return Load(type, data_pointer, offset);
+}
+
 Node* CodeStubAssembler::LoadAndUntagToWord32FixedArrayElement(
     Node* object, Node* index_node, int additional_offset,
     ParameterMode parameter_mode) {
   int32_t header_size =
       FixedArray::kHeaderSize + additional_offset - kHeapObjectTag;
 #if V8_TARGET_LITTLE_ENDIAN
   if (Is64()) {
     header_size += kPointerSize / 2;
   }
 #endif
@@ skipping 6181 matching lines @@
   Bind(&return_runtime);
   {
     result.Bind(CallRuntime(Runtime::kInstanceOf, context, object, callable));
     Goto(&end);
   }
 
   Bind(&end);
   return result.value();
 }
 
+compiler::Node* CodeStubAssembler::NumberInc(compiler::Node* value) {
+  Variable var_result(this, MachineRepresentation::kTagged),
+      var_finc_value(this, MachineRepresentation::kFloat64);
+  Label if_issmi(this), if_isnotsmi(this), do_finc(this), end(this);
+  Branch(TaggedIsSmi(value), &if_issmi, &if_isnotsmi);
+
+  Bind(&if_issmi);
+  {
+    // Try fast Smi addition first.
+    Node* one = SmiConstant(Smi::FromInt(1));
+    Node* pair = SmiAddWithOverflow(value, one);
+    Node* overflow = Projection(1, pair);
+
+    // Check if the Smi addition overflowed.
+    Label if_overflow(this), if_notoverflow(this);
+    Branch(overflow, &if_overflow, &if_notoverflow);
+
+    Bind(&if_notoverflow);
+    var_result.Bind(Projection(0, pair));
+    Goto(&end);
+
+    Bind(&if_overflow);
+    {
+      var_finc_value.Bind(SmiToFloat64(value));
+      Goto(&do_finc);
+    }
+  }
+
+  Bind(&if_isnotsmi);
+  {
+    // Check if the value is a HeapNumber.
+    Assert(IsHeapNumberMap(LoadMap(value)));
+
+    // Load the HeapNumber value.
+    var_finc_value.Bind(LoadHeapNumberValue(value));
+    Goto(&do_finc);
+  }
+
+  Bind(&do_finc);
+  {
+    Node* finc_value = var_finc_value.value();
+    Node* one = Float64Constant(1.0);
+    Node* finc_result = Float64Add(finc_value, one);
+    var_result.Bind(ChangeFloat64ToTagged(finc_result));
+    Goto(&end);
+  }
+
+  Bind(&end);
+  return var_result.value();
+}
+
 }  // namespace internal
 }  // namespace v8