MIPS: Track storage types of instance variables.

src/mips/lithium-mips.h

Index: src/mips/lithium-mips.h
diff --git a/src/mips/lithium-mips.h b/src/mips/lithium-mips.h
index cfca64452b5a344eb1ac3b1ac7c3c12de8d06921..be23fcad0366a661e5e131c9211c43612db2a56d 100644
--- a/src/mips/lithium-mips.h
+++ b/src/mips/lithium-mips.h
@@ -2089,6 +2089,9 @@ class LStoreNamedField: public LTemplateInstruction<0, 2, 1> {
   bool is_in_object() { return hydrogen()->is_in_object(); }
   int offset() { return hydrogen()->offset(); }
   Handle<Map> transition() const { return hydrogen()->transition(); }
+  Representation representation() const {
+    return hydrogen()->field_representation();
+  }
 };