Load predefined symbols address via Thread.

runtime/vm/intermediate_language_mips.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_MIPS.
 #if defined(TARGET_ARCH_MIPS)
 
 #include "vm/intermediate_language.h"
 
 #include "vm/dart_entry.h"
@@ skipping 1032 matching lines @@
 }
 
 
 void StringFromCharCodeInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
   ASSERT(compiler->is_optimizing());
   Register char_code = locs()->in(0).reg();
   Register result = locs()->out(0).reg();
 
   __ Comment("StringFromCharCodeInstr");
 
-  ExternalLabel label(reinterpret_cast<uword>(Symbols::PredefinedAddress()));
-  __ LoadExternalLabel(result, &label, kNotPatchable);
+  __ lw(result, Address(THR, Thread::predefined_symbols_address_offset()));
   __ AddImmediate(result, Symbols::kNullCharCodeSymbolOffset * kWordSize);
   __ sll(TMP, char_code, 1);  // Char code is a smi.
   __ addu(TMP, TMP, result);
   __ lw(result, Address(TMP));
 }
 
 
 LocationSummary* StringToCharCodeInstr::MakeLocationSummary(Zone* zone,
                                                             bool opt) const {
   const intptr_t kNumInputs = 1;
@@ skipping 4533 matching lines @@
                                 1,
                                 locs());
   __ lw(result, Address(SP, 1 * kWordSize));
   __ addiu(SP, SP, Immediate(2 * kWordSize));
 }
 
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_MIPS