Deoptimizer support for hydrogen stubs that accept a variable number of arguments.

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index 7ddfdfc8e48a8d3ae2fd358cb0ef610844a5a76f..c1eabe415e0f3825bff149383537ad90c0e0fac1 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -3843,7 +3843,7 @@ void Code::set_has_function_cache(bool flag) {
 
 
 bool Code::marked_for_deoptimization() {
-  ASSERT(kind() == OPTIMIZED_FUNCTION);
+  ASSERT(kind() == OPTIMIZED_FUNCTION || kind() == COMPILED_STUB);

[danno, 2013/03/20 21:07:33]

Why is this additional check needed?

[mvstanton, 2013/03/21 11:47:35]

I removed it, and spoke with Ulan. In fact we should prevent compiled stubs from
getting into a list of code that is checked for this flag. A separate change in
LCodeGen::FinishCode() will guard against anything other than
OPTIMIZED_FUNCTIONs getting in there.

   return MarkedForDeoptimizationField::decode(
       READ_UINT32_FIELD(this, kKindSpecificFlags1Offset));
 }