Introduces a second temporary register for MIPS assembler macros.

runtime/vm/constants_mips.h

 // 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.
 
 #ifndef VM_CONSTANTS_MIPS_H_
 #define VM_CONSTANTS_MIPS_H_
 
 namespace dart {
 
 enum Register {
@@ skipping 116 matching lines @@
 };
 
 
 // Architecture independent aliases.
 typedef FRegister FpuRegister;
 const FpuRegister FpuTMP = F0;
 const int kNumberOfFpuRegisters = kNumberOfFRegisters;
 
 
 // Register aliases.
-const Register TMP = AT;  // Used as scratch register by assembler.
+const Register TMP1 = AT;  // Used as scratch register by assembler.
+const Register TMP2 = T9;  // Used as scratch register by assembler.
+const Register TMP = TMP1;  // Arch independent flow graph compiler needs a
+                            // Register called TMP.
 const Register CTX = S6;  // Caches current context in generated code.
 const Register PP = S7;  // Caches object pool pointer in generated code.
 const Register SPREG = SP;  // Stack pointer register.
 const Register FPREG = FP;  // Frame pointer register.
 
 
 typedef uint32_t RegList;
 const RegList kAllCpuRegistersList = 0xFFFFFFFF;
 
 
@@ skipping 249 matching lines @@
   static Instr* At(uword pc) { return reinterpret_cast<Instr*>(pc); }
 
  private:
   DISALLOW_ALLOCATION();
   DISALLOW_IMPLICIT_CONSTRUCTORS(Instr);
 };
 
 }  // namespace dart
 
 #endif  // VM_CONSTANTS_MIPS_H_