Reduce the amount of full code generated to fill out array literals.

src/hydrogen.cc

Index: src/hydrogen.cc
diff --git a/src/hydrogen.cc b/src/hydrogen.cc
index 3d0d5505aea05800177fdce62d85f9cafe7dcaef..616b1823a69d04c70b3c0f86d90517cba90d1b21 100644
--- a/src/hydrogen.cc
+++ b/src/hydrogen.cc
@@ -6100,6 +6100,9 @@ void HOptimizedGraphBuilder::VisitArrayLiteral(ArrayLiteral* expr) {
   // The array is expected in the bailout environment during computation
   // of the property values and is the value of the entire expression.
   Push(literal);
+  // The literal index is on the stack, too.
+  Push(AddInstruction(
+      new(zone()) HConstant(expr->literal_index(), Representation::Smi())));

[Michael Starzinger, 2013/06/13 13:57:27]

I would just not specify a particular representation in HConstant constructor
and let the inferencer figure it out.

[Sven Panne, 2013/06/14 06:04:32]

Done.

 
   HInstruction* elements = NULL;
 
@@ -6137,6 +6140,8 @@ void HOptimizedGraphBuilder::VisitArrayLiteral(ArrayLiteral* expr) {
 
     AddSimulate(expr->GetIdForElement(i));
   }
+
+  Drop(1);  // array literal index
   return ast_context()->ReturnValue(Pop());
 }