Make closures optimizable by Crankshaft compiler.

src/hydrogen-instructions.cc

 // Copyright 2010 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1208 matching lines @@
   if (check_hole_value()) stream->Add(" (deleteable/read-only)");
 }
 
 
 void HStoreGlobal::PrintDataTo(StringStream* stream) const {
   stream->Add("[%p] = ", *cell());
   value()->PrintNameTo(stream);
 }
 
 
+void HLoadContextSlot::PrintDataTo(StringStream* stream) const {
+  stream->Add("[%d->%d]]", context_chain_length(), slot_index());

[Kevin Millikin (Chromium), 2010/12/20 12:05:44]

I think you have an extra "]" here.  I'm not wild about the ASCII arrow, because
it doesn't really signify anything.  "(%d,%d) seems fine to me.

[antonm, 2010/12/20 20:39:24]

Done.

I used -> syntax to mimic C/C++ structure's field access

+}
+
+
 // Implementation of type inference and type conversions. Calculates
 // the inferred type of this instruction based on the input operands.
 
 HType HValue::CalculateInferredType() const {
   return type_;
 }
 
 
 HType HCheckMap::CalculateInferredType() const {
   return value()->type();
@@ skipping 234 matching lines @@
 
 
 void HCheckPrototypeMaps::Verify() const {
   HInstruction::Verify();
   ASSERT(HasNoUses());
 }
 
 #endif
 
 } }  // namespace v8::internal