Don't emit a write barrier when storing boolean-typed values.

src/hydrogen-instructions.h

Index: src/hydrogen-instructions.h
===================================================================
--- src/hydrogen-instructions.h	(revision 8559)
+++ src/hydrogen-instructions.h	(working copy)
@@ -3362,8 +3362,9 @@
 
 
 static inline bool StoringValueNeedsWriteBarrier(HValue* value) {
-  return !value->type().IsSmi() &&
-      !(value->IsConstant() && HConstant::cast(value)->InOldSpace());
+  return !value->type().IsBoolean()
+      && !value->type().IsSmi()

[Kevin Millikin (Chromium), 2011/07/07 10:13:44]

OK.  The predicate here would be easier to read if it was negated, but maybe
that's less good at the call sites.

+      && !(value->IsConstant() && HConstant::cast(value)->InOldSpace());
 }