Don't actually create Handles for the constant hole.

src/hydrogen.cc

Index: src/hydrogen.cc
diff --git a/src/hydrogen.cc b/src/hydrogen.cc
index ee3d6b5cfb632effc8ac270dfdeeed222528cdf0..2d62349cff30e329fbef22c3095a34c810b2a0f5 100644
--- a/src/hydrogen.cc
+++ b/src/hydrogen.cc
@@ -600,7 +600,15 @@ HConstant* HGraph::GetConstantFalse() {
 
 
 HConstant* HGraph::GetConstantHole() {
-  return GetConstant(&constant_hole_, isolate()->heap()->the_hole_value());
+  if (!constant_hole_.is_set()) {
+    Handle<Object> hole_value = Handle<Object>(
+        &isolate()->heap()->roots_array_start()[Heap::kTheHoleValueRootIndex]);

[Michael Starzinger, 2012/07/02 20:11:20]

Likewise.

[sanjoy, 2012/07/03 09:05:52]

Done.

+    HConstant* constant = new(zone()) HConstant(hole_value,
+                                                Representation::Tagged());
+    constant->InsertAfter(GetConstantUndefined());
+    constant_hole_.set(constant);
+  }
+  return constant_hole_.get();
 }