Reduce the memory used by frame elements from two words to one by...

src/compiler.h

Index: src/compiler.h
===================================================================
--- src/compiler.h	(revision 1947)
+++ src/compiler.h	(working copy)
@@ -29,6 +29,8 @@
 #define V8_COMPILER_H_
 
 #include "parser.h"
+#include "zone.h"
+#include "frame-element.h"

[Kevin Millikin (Chromium), 2009/05/14 11:29:02]

Is it OK to alphabetize these?

[Mads Ager (chromium), 2009/05/14 11:42:40]

It is.  Done.

 
 namespace v8 { namespace internal {
 
@@ -69,6 +71,19 @@
   static bool CompileLazy(Handle<SharedFunctionInfo> shared, int loop_nesting);
 };
 
+
+// During compilation we need a global list of handles to constants
+// for frame elements.  When the zone gets deleted, we make sure to
+// clear this list of handles as well.
+class CompilationZoneScope : public ZoneScope {
+ public:
+  CompilationZoneScope(ZoneScopeMode mode) : ZoneScope(mode) { };
+  virtual ~CompilationZoneScope() {
+    if (ShouldDeleteOnExit()) FrameElement::ClearConstantList();
+  };
+};
+
+
 } }  // namespace v8::internal
 
 #endif  // V8_COMPILER_H_