Refactor HType to get rid of various hacks.

src/hydrogen-types.cc

+// Copyright 2014 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 "hydrogen-types.h"
+
+#include "types-inl.h"
+
+
+namespace v8 {
+namespace internal {
+
+// static
+template <class T>
+HType HType::FromType(typename T::TypeHandle type) {
+  if (T::Any()->Is(type)) return HType::Any();
+  if (type->Is(T::None())) return HType::None();
+  if (type->Is(T::SignedSmall())) return HType::Smi();
+  if (type->Is(T::Number())) return HType::TaggedNumber();
+  if (type->Is(T::Null())) return HType::Null();
+  if (type->Is(T::String())) return HType::String();
+  if (type->Is(T::Boolean())) return HType::Boolean();
+  if (type->Is(T::Undefined())) return HType::Undefined();
+  if (type->Is(T::Array())) return HType::JSArray();
+  if (type->Is(T::Object())) return HType::JSObject();
+  return HType::Tagged();
+}
+
+
+// static
+template
+HType HType::FromType<Type>(Type* type);
+
+
+// static
+template
+HType HType::FromType<HeapType>(Handle<HeapType> type);
+
+
+// static
+HType HType::FromValue(Handle<Object> value) {
+  if (value->IsSmi()) return HType::Smi();
+  if (value->IsNull()) return HType::Null();
+  if (value->IsHeapNumber()) return HType::HeapNumber();
+  if (value->IsString()) return HType::String();
+  if (value->IsBoolean()) return HType::Boolean();
+  if (value->IsUndefined()) return HType::Undefined();
+  if (value->IsJSArray()) return HType::JSArray();
+  if (value->IsJSObject()) return HType::JSObject();
+  ASSERT(value->IsHeapObject());
+  return HType::HeapObject();
+}
+
+
+const char* HType::ToString() const {
+  // Note: The c1visualizer syntax for locals allows only a sequence of the
+  // following characters: A-Za-z0-9_-|:
+  switch (kind_) {
+    #define DEFINE_CASE(Name, mask) case k##Name: return #Name;
+    HTYPE_LIST(DEFINE_CASE)
+    #undef DEFINE_CASE
+  }
+  UNREACHABLE();
+  return NULL;
+}
+
+} }  // namespace v8::internal