Parallelize marking phase of mark-sweep/compact collection cycle.

src/ia32/assembler-ia32-inl.h

Index: src/ia32/assembler-ia32-inl.h
diff --git a/src/ia32/assembler-ia32-inl.h b/src/ia32/assembler-ia32-inl.h
index ecbdfdcff69779fd99b63b540b381ee92b156473..6715b2c170e19763073e459b0728849a0d35b628 100644
--- a/src/ia32/assembler-ia32-inl.h
+++ b/src/ia32/assembler-ia32-inl.h
@@ -206,6 +206,30 @@ void RelocInfo::Visit() {
 }
 
 
+template<typename StaticVisitor, typename Data>
+void RelocInfo::Visit(Data data) {
+  RelocInfo::Mode mode = rmode();
+  if (mode == RelocInfo::EMBEDDED_OBJECT) {
+    StaticVisitor::VisitPointer(target_object_address(), data);
+  } else if (RelocInfo::IsCodeTarget(mode)) {
+    StaticVisitor::VisitCodeTarget(this, data);
+  } else if (mode == RelocInfo::EXTERNAL_REFERENCE) {
+    StaticVisitor::VisitExternalReference(target_reference_address(), data);
+#ifdef ENABLE_DEBUGGER_SUPPORT
+  } else if (Debug::has_break_points() &&
+             ((RelocInfo::IsJSReturn(mode) &&
+              IsPatchedReturnSequence()) ||
+             (RelocInfo::IsDebugBreakSlot(mode) &&
+              IsPatchedDebugBreakSlotSequence()))) {
+    StaticVisitor::VisitDebugTarget(this, data);
+#endif
+  } else if (mode == RelocInfo::RUNTIME_ENTRY) {
+    StaticVisitor::VisitRuntimeEntry(this, data);
+  }
+}
+
+
+
 
 Immediate::Immediate(int x)  {
   x_ = x;