Change the handling of catch blocks to use context extension objects...

src/codegen-ia32.cc

Index: src/codegen-ia32.cc
===================================================================
--- src/codegen-ia32.cc	(revision 1089)
+++ src/codegen-ia32.cc	(working copy)
@@ -2505,7 +2505,7 @@
 
 
   for (int i = 0; i < node->properties()->length(); i++) {
-    ObjectLiteral::Property* property  = node->properties()->at(i);
+    ObjectLiteral::Property* property = node->properties()->at(i);
     switch (property->kind()) {
       case ObjectLiteral::Property::CONSTANT: break;
       case ObjectLiteral::Property::COMPUTED: {
@@ -2607,6 +2607,17 @@
 }
 
 
+void CodeGenerator::VisitCatchExtensionObject(CatchExtensionObject* node) {
+  // Call runtime routine to allocate the catch extension object and
+  // assign the exception value to the catch variable.
+  Comment cmnt(masm_, "[CatchExtensionObject ");
+  Load(node->key());
+  Load(node->value());
+  __ CallRuntime(Runtime::kCreateCatchExtensionObject, 2);
+  frame_->Push(eax);
+}
+
+
 bool CodeGenerator::IsInlineSmi(Literal* literal) {
   if (literal == NULL || !literal->handle()->IsSmi()) return false;
   int int_value = Smi::cast(*literal->handle())->value();