MIPS: Use allocatable registers for Interpreter.

src/compiler/mips/linkage-mips.cc

Index: src/compiler/mips/linkage-mips.cc
diff --git a/src/compiler/mips/linkage-mips.cc b/src/compiler/mips/linkage-mips.cc
index b3d3b91d8305e6457ac2406c31a278be9295fbc2..9f56b83a5053019f736043b61c49b722af0ccfa9 100644
--- a/src/compiler/mips/linkage-mips.cc
+++ b/src/compiler/mips/linkage-mips.cc
@@ -17,8 +17,8 @@ struct MipsLinkageHelperTraits {
   static Register ReturnValue2Reg() { return v1; }
   static Register JSCallFunctionReg() { return a1; }
   static Register ContextReg() { return cp; }
-  static Register InterpreterBytecodePointerReg() { return s0; }
-  static Register InterpreterDispatchTableReg() { return s1; }
+  static Register InterpreterBytecodePointerReg() { return t5; }
+  static Register InterpreterDispatchTableReg() { return t6; }
   static Register RuntimeCallFunctionReg() { return a1; }
   static Register RuntimeCallArgCountReg() { return a0; }
   static RegList CCalleeSaveRegisters() {