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

src/code-stub-assembler.cc

Index: src/code-stub-assembler.cc
diff --git a/src/code-stub-assembler.cc b/src/code-stub-assembler.cc
index 6adec9aff6fd100da4efb4b4baa942b281566f2f..7c8fe49aa7f8652f974a9bfdbf22c995e18f98eb 100644
--- a/src/code-stub-assembler.cc
+++ b/src/code-stub-assembler.cc
@@ -1041,6 +1041,44 @@ Node* CodeStubAssembler::LoadFixedArrayElement(Node* object, Node* index_node,
   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) {
@@ -7242,5 +7280,56 @@ compiler::Node* CodeStubAssembler::InstanceOf(compiler::Node* object,
   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