Introduce code flushing of RegExp code.

src/jsregexp.cc

Index: src/jsregexp.cc
===================================================================
--- src/jsregexp.cc	(revision 8431)
+++ src/jsregexp.cc	(working copy)
@@ -295,6 +295,15 @@
 #else  // V8_INTERPRETED_REGEXP (RegExp native code)
   if (compiled_code->IsCode()) return true;
 #endif
+  // We could potentially have marked this as flushable, but have keept

[Erik Corry, 2011/06/30 18:48:25]

keept -> kept

[Rico, 2011/07/01 05:58:09]

Done.

+  // a saved version if we did not flush it yet.
+  Object* saved_code = re->DataAt(JSRegExp::saved_code_index(is_ascii));
+  if (saved_code->IsCode()) {
+    // Reinstate the code in the original place.
+    re->SetDataAt(JSRegExp::code_index(is_ascii), saved_code);
+    ASSERT(compiled_code->IsSmi());
+    return true;
+  }
   return CompileIrregexp(re, is_ascii);
 }
 
@@ -311,7 +320,7 @@
     isolate->Throw(entry);
     return false;
   }
-  ASSERT(entry->IsTheHole());
+  ASSERT(entry->IsSmi());
 
   JSRegExp::Flags flags = re->GetFlags();