MIPS: Fixed a bug in StringHelper::GenerateTwoCharacterSymbolTableProbe.

src/mips/code-stubs-mips.cc

 // Copyright 2011 the V8 project authors. 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.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 5766 matching lines @@
     __ sll(scratch, candidate, kPointerSizeLog2);
     __ Addu(scratch, scratch, first_symbol_table_element);
     __ lw(candidate, MemOperand(scratch));
 
     // If entry is undefined no string with this hash can be found.
     Label is_string;
     __ GetObjectType(candidate, scratch, scratch);
     __ Branch(&is_string, ne, scratch, Operand(ODDBALL_TYPE));
 
     __ Branch(not_found, eq, undefined, Operand(candidate));
-    // Must be null (deleted entry).
+    // Must be the hole value (deleted entry).
     if (FLAG_debug_code) {
-      __ LoadRoot(scratch, Heap::kNullValueRootIndex);
-      __ Assert(eq, "oddball in symbol table is not undefined or null",
+      __ LoadRoot(scratch, Heap::kTheHoleValueRootIndex);
+      __ Assert(eq, "oddball in symbol table is not undefined or the hole value",
           scratch, Operand(candidate));
     }
     __ jmp(&next_probe[i]);
 
     __ bind(&is_string);
 
     // Check that the candidate is a non-external ASCII string.  The instance
     // type is still in the scratch register from the CompareObjectType
     // operation.
     __ JumpIfInstanceTypeIsNotSequentialAscii(scratch, scratch, &next_probe[i]);
@@ skipping 1666 matching lines @@
 
   // Fall through when we need to inform the incremental marker.
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS