[interpreter] Add Interpreter{Entry,Exit}Trampoline builtins.

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 e2d8b6c3186067384ed3add5e2d46a28c686fd44..610ebbbb90cb2492a5dd93e3011c88ce77b31b40 100644
--- a/src/compiler/mips/linkage-mips.cc
+++ b/src/compiler/mips/linkage-mips.cc
@@ -17,9 +17,15 @@ struct MipsLinkageHelperTraits {
   static Register ReturnValue2Reg() { return v1; }
   static Register JSCallFunctionReg() { return a1; }
   static Register ContextReg() { return cp; }
-  static Register InterpreterBytecodeOffsetReg() { return t4; }
-  static Register InterpreterBytecodeArrayReg() { return t5; }
-  static Register InterpreterDispatchTableReg() { return t6; }
+  static Register InterpreterBytecodeOffsetReg() {
+    return kInterpreterBytecodeOffsetRegister;
+  }
+  static Register InterpreterBytecodeArrayReg() {
+    return kInterpreterBytecodeArrayRegister;
+  }
+  static Register InterpreterDispatchTableReg() {
+    return kInterpreterDispatchTableRegister;
+  }
   static Register RuntimeCallFunctionReg() { return a1; }
   static Register RuntimeCallArgCountReg() { return a0; }
   static RegList CCalleeSaveRegisters() {