Make closures optimizable by Crankshaft compiler.

src/hydrogen-instructions.cc

Index: src/hydrogen-instructions.cc
diff --git a/src/hydrogen-instructions.cc b/src/hydrogen-instructions.cc
index 670dad85c5d7ca23367d4abaf88e8233159c7c04..8b1378cb8f722f6f8f2963fd0f360893d43800a9 100644
--- a/src/hydrogen-instructions.cc
+++ b/src/hydrogen-instructions.cc
@@ -1226,6 +1226,11 @@ void HStoreGlobal::PrintDataTo(StringStream* stream) const {
 }
 
 
+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.