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

src/ia32/assembler-ia32-inl.h

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // All Rights Reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 // - Redistributions of source code must retain the above copyright notice,
 // this list of conditions and the following disclaimer.
 //
@@ skipping 188 matching lines @@
              (RelocInfo::IsDebugBreakSlot(mode) &&
               IsPatchedDebugBreakSlotSequence()))) {
     StaticVisitor::VisitDebugTarget(this);
 #endif
   } else if (mode == RelocInfo::RUNTIME_ENTRY) {
     StaticVisitor::VisitRuntimeEntry(this);
   }
 }
 
 
+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;
   rmode_ = RelocInfo::NONE;
 }
 
 
 Immediate::Immediate(const ExternalReference& ext) {
   x_ = reinterpret_cast<int32_t>(ext.address());
   rmode_ = RelocInfo::EXTERNAL_REFERENCE;
@@ skipping 157 matching lines @@
 
 Operand::Operand(int32_t disp, RelocInfo::Mode rmode) {
   // [disp/r]
   set_modrm(0, ebp);
   set_dispr(disp, rmode);
 }
 
 } }  // namespace v8::internal
 
 #endif  // V8_IA32_ASSEMBLER_IA32_INL_H_