MIPS: Optimize Smi keys for KeyedLoads

src/mips/lithium-codegen-mips.h

Index: src/mips/lithium-codegen-mips.h
diff --git a/src/mips/lithium-codegen-mips.h b/src/mips/lithium-codegen-mips.h
index a2125d70b8b662c843ac59436d10e89785b9c6ba..570fb0732a89812a391d89337bd2aac8406bbd23 100644
--- a/src/mips/lithium-codegen-mips.h
+++ b/src/mips/lithium-codegen-mips.h
@@ -128,6 +128,15 @@ class LCodeGen BASE_EMBEDDED {
   void DoParallelMove(LParallelMove* move);
   void DoGap(LGap* instr);
 
+  MemOperand PrepareKeyedOperand(Register key,
+                                 Register base,
+                                 bool key_is_constant,
+                                 int constant_key,
+                                 int element_size,
+                                 int shift_size,
+                                 int additional_index,
+                                 int additional_offset);
+
   // Emit frame translation commands for an environment.
   void WriteTranslation(LEnvironment* environment, Translation* translation);