ARM: Use ubfx and movw instructions to avoid a PC-relative load on

src/assembler.cc

Index: src/assembler.cc
===================================================================
--- src/assembler.cc	(revision 10578)
+++ src/assembler.cc	(working copy)
@@ -603,8 +603,13 @@
       return "statement position";
     case RelocInfo::EXTERNAL_REFERENCE:
       return "external reference";
+#ifndef V8_TARGET_ARCH_ARM
     case RelocInfo::INTERNAL_REFERENCE:
       return "internal reference";
+#else
+    case RelocInfo::MAP_SIGNATURE:
+      return "map signature";
+#endif
     case RelocInfo::DEBUG_BREAK_SLOT:
 #ifndef ENABLE_DEBUGGER_SUPPORT
       UNREACHABLE();
@@ -659,6 +664,9 @@
 void RelocInfo::Verify() {
   switch (rmode_) {
     case EMBEDDED_OBJECT:
+#ifdef V8_TARGET_ARCH_ARM
+    case MAP_SIGNATURE:
+#endif
       Object::VerifyPointer(target_object());
       break;
     case GLOBAL_PROPERTY_CELL:
@@ -689,7 +697,9 @@
     case POSITION:
     case STATEMENT_POSITION:
     case EXTERNAL_REFERENCE:
+#ifndef V8_TARGET_ARCH_ARM
     case INTERNAL_REFERENCE:
+#endif
     case DEBUG_BREAK_SLOT:
     case NONE:
       break;