MIPS: Allow specifying base offset when constructing Keyed hydrogen instructions.

src/mips/lithium-mips.cc

Index: src/mips/lithium-mips.cc
diff --git a/src/mips/lithium-mips.cc b/src/mips/lithium-mips.cc
index 97b91fac3995476829ce2f3d7347820ff4aa7a4b..28cd6ddb43adbc0033f12d3ccaa95ae262d5b242 100644
--- a/src/mips/lithium-mips.cc
+++ b/src/mips/lithium-mips.cc
@@ -342,7 +342,7 @@ void LLoadKeyed::PrintDataTo(StringStream* stream) {
   stream->Add("[");
   key()->PrintTo(stream);
   if (hydrogen()->IsDehoisted()) {
-    stream->Add(" + %d]", additional_index());
+    stream->Add(" + %d]", base_offset());
   } else {
     stream->Add("]");
   }
@@ -354,7 +354,7 @@ void LStoreKeyed::PrintDataTo(StringStream* stream) {
   stream->Add("[");
   key()->PrintTo(stream);
   if (hydrogen()->IsDehoisted()) {
-    stream->Add(" + %d] <-", additional_index());
+    stream->Add(" + %d] <-", base_offset());
   } else {
     stream->Add("] <- ");
   }