diff --git a/src/assembler.cc b/src/assembler.cc
index dbf2742..aaf10ef 100644
--- a/src/assembler.cc
+++ b/src/assembler.cc
@@ -430,6 +430,11 @@
       return "code target (js construct call)";
     case RelocInfo::CODE_TARGET_CONTEXT:
       return "code target (context)";
+    case RelocInfo::DEBUG_BREAK:
+#ifndef ENABLE_DEBUGGER_SUPPORT
+      UNREACHABLE();
+#endif
+      return "debug break";
     case RelocInfo::CODE_TARGET:
       return "code target";
     case RelocInfo::RUNTIME_ENTRY:
@@ -485,6 +490,11 @@
     case EMBEDDED_OBJECT:
       Object::VerifyPointer(target_object());
       break;
+    case DEBUG_BREAK:
+#ifndef ENABLE_DEBUGGER_SUPPORT
+      UNREACHABLE();
+      break;
+#endif
     case CONSTRUCT_CALL:
     case CODE_TARGET_CONTEXT:
     case CODE_TARGET: {
@@ -569,6 +579,11 @@
 }
 
 
+ExternalReference ExternalReference::transcendental_cache_array_address() {
+  return ExternalReference(TranscendentalCache::cache_array_address());
+}
+
+
 ExternalReference ExternalReference::keyed_lookup_cache_keys() {
   return ExternalReference(KeyedLookupCache::keys_address());
 }
@@ -609,6 +624,11 @@
 }
 
 
+ExternalReference ExternalReference::new_space_mask() {
+  return ExternalReference(reinterpret_cast<Address>(Heap::NewSpaceMask()));
+}
+
+
 ExternalReference ExternalReference::new_space_allocation_top_address() {
   return ExternalReference(Heap::NewSpaceAllocationTopAddress());
 }