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

src/x64/assembler-x64-inl.h

Index: src/x64/assembler-x64-inl.h
diff --git a/src/x64/assembler-x64-inl.h b/src/x64/assembler-x64-inl.h
index 44159e062665371d0ff4c2c4e663180eefa8dca3..f040d24f2ea9862ba1ef21631380cda40a5d2051 100644
--- a/src/x64/assembler-x64-inl.h
+++ b/src/x64/assembler-x64-inl.h
@@ -373,6 +373,29 @@ 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);
+  }
+}
+
+
 // -----------------------------------------------------------------------------
 // Implementation of Operand