MIPS: Fix for an ARM register allocation bug.

src/mips/macro-assembler-mips.h

 // 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 33 matching lines @@
 //
 // The programmer should know that the MacroAssembler may clobber these three,
 // but won't touch other registers except in special cases.
 //
 // Per the MIPS ABI, register t9 must be used for indirect function call
 // via 'jalr t9' or 'jr t9' instructions. This is relied upon by gcc when
 // trying to update gp register for position-independent-code. Whenever
 // MIPS generated code calls C code, it must be via t9 register.
 
 
-// Register aliases.
-// cp is assumed to be a callee saved register.
-const Register kLithiumScratchReg = s3;  // Scratch register.
-const Register kLithiumScratchReg2 = s4;  // Scratch register.
-const Register kCondReg = s5;  // Simulated (partial) condition code for mips.
-const Register kRootRegister = s6;  // Roots array pointer.
-const Register cp = s7;     // JavaScript context pointer.
-const Register fp = s8_fp;  // Alias for fp.
-const DoubleRegister kLithiumScratchDouble = f30;  // Double scratch register.
-
 // Flags used for the AllocateInNewSpace functions.
 enum AllocationFlags {
   // No special flags.
   NO_ALLOCATION_FLAGS = 0,
   // Return the pointer to the allocated already tagged as a heap object.
   TAG_OBJECT = 1 << 0,
   // The content of the result register already contains the allocation top in
   // new space.
   RESULT_CONTAINS_TOP = 1 << 1,
   // Specify that the requested size of the space to allocate is specified in
@@ skipping 1380 matching lines @@
 #define CODE_COVERAGE_TOSTRING(x) CODE_COVERAGE_STRINGIFY(x)
 #define __FILE_LINE__ __FILE__ ":" CODE_COVERAGE_TOSTRING(__LINE__)
 #define ACCESS_MASM(masm) masm->stop(__FILE_LINE__); masm->
 #else
 #define ACCESS_MASM(masm) masm->
 #endif
 
 } }  // namespace v8::internal
 
 #endif  // V8_MIPS_MACRO_ASSEMBLER_MIPS_H_