Generate TypedArrayInitialize builtin in hydrogen.

src/property-details.h

Index: src/property-details.h
diff --git a/src/property-details.h b/src/property-details.h
index 92e4f81c01cb1e6b5f28eee3e5ce74aadd6d18a3..8f26c8b18a53923fc6279ed90ee5d83121951832 100644
--- a/src/property-details.h
+++ b/src/property-details.h
@@ -131,6 +131,10 @@ class Representation {
   }
 
   bool is_more_general_than(const Representation& other) const {
+    if (kind_ == kExternal && other.kind_ == kNone) return true;
+    if (kind_ == kExternal && other.kind_ == kExternal) return false;
+    if (kind_ == kNone && other.kind_ == kExternal) return false;

[mvstanton, 2013/11/18 10:44:49]

How do you know these are the only cases you'll be asked about? (kExternal,
kNone), (kExternal, kExternal), (kNone, kExternal)

[Dmitry Lomov (no reviews), 2013/11/18 13:48:14]

Representation is a lattice where kNone is the bottom element and kExternal is
uncomparable with anything else. We assert on uncomparable.

+
     ASSERT(kind_ != kExternal);
     ASSERT(other.kind_ != kExternal);
     if (IsHeapObject()) return other.IsDouble() || other.IsNone();