Load predefined symbols address via Thread.

runtime/vm/intrinsifier_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/intrinsifier.h"
 
 #include "vm/assembler.h"
@@ skipping 1749 matching lines @@
   __ LoadClassId(CMPRES1, T0);  // Class ID check.
   __ BranchNotEqual(
       CMPRES1, Immediate(kOneByteStringCid), &try_two_byte_string);
 
   // Grab byte and return.
   __ SmiUntag(T1);
   __ addu(T2, T0, T1);
   __ lbu(T2, FieldAddress(T2, OneByteString::data_offset()));
   __ BranchUnsignedGreaterEqual(
       T2, Immediate(Symbols::kNumberOfOneCharCodeSymbols), &fall_through);
-  const ExternalLabel symbols_label(
-      reinterpret_cast<uword>(Symbols::PredefinedAddress()));
-  __ Push(PP);
-  __ Push(RA);
-  __ LoadPoolPointer();
-  assembler->set_constant_pool_allowed(true);
-  __ LoadExternalLabel(V0, &symbols_label, kNotPatchable);
-  assembler->set_constant_pool_allowed(false);
-  __ Pop(RA);
-  __ Pop(PP);
+  __ lw(V0, Address(THR, Thread::predefined_symbols_address_offset()));
   __ AddImmediate(V0, Symbols::kNullCharCodeSymbolOffset * kWordSize);
   __ sll(T2, T2, 2);
   __ addu(T2, T2, V0);
   __ Ret();
   __ delay_slot()->lw(V0, Address(T2));
 
   __ Bind(&try_two_byte_string);
   __ BranchNotEqual(CMPRES1, Immediate(kTwoByteStringCid), &fall_through);
   ASSERT(kSmiTagShift == 1);
   __ addu(T2, T0, T1);
   __ lhu(T2, FieldAddress(T2, TwoByteString::data_offset()));
   __ BranchUnsignedGreaterEqual(
       T2, Immediate(Symbols::kNumberOfOneCharCodeSymbols), &fall_through);
-  __ Push(PP);
-  __ Push(RA);
-  __ LoadPoolPointer();
-  assembler->set_constant_pool_allowed(true);
-  __ LoadExternalLabel(V0, &symbols_label, kNotPatchable);
-  assembler->set_constant_pool_allowed(false);
-  __ Pop(RA);
-  __ Pop(PP);
+  __ lw(V0, Address(THR, Thread::predefined_symbols_address_offset()));
   __ AddImmediate(V0, Symbols::kNullCharCodeSymbolOffset * kWordSize);
   __ sll(T2, T2, 2);
   __ addu(T2, T2, V0);
   __ Ret();
   __ delay_slot()->lw(V0, Address(T2));
 
   __ Bind(&fall_through);
 }
 
 
@@ skipping 363 matching lines @@
 
 void Intrinsifier::Profiler_getCurrentTag(Assembler* assembler) {
   __ LoadIsolate(V0);
   __ Ret();
   __ delay_slot()->lw(V0, Address(V0, Isolate::current_tag_offset()));
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_MIPS