Distinguish slow from fast sloppy arguments

src/x64/lithium-codegen-x64.cc

Index: src/x64/lithium-codegen-x64.cc
diff --git a/src/x64/lithium-codegen-x64.cc b/src/x64/lithium-codegen-x64.cc
index eb11d176909896fdb91d97c678bfed7d08f46c30..866ec055efc75eb451202c466588775c2b45729c 100644
--- a/src/x64/lithium-codegen-x64.cc
+++ b/src/x64/lithium-codegen-x64.cc
@@ -3137,7 +3137,8 @@ void LCodeGen::DoLoadKeyedExternalArray(LLoadKeyed* instr) {
       case FAST_HOLEY_SMI_ELEMENTS:
       case FAST_HOLEY_DOUBLE_ELEMENTS:
       case DICTIONARY_ELEMENTS:
-      case SLOPPY_ARGUMENTS_ELEMENTS:
+      case FAST_SLOPPY_ARGUMENTS_ELEMENTS:
+      case SLOW_SLOPPY_ARGUMENTS_ELEMENTS:
         UNREACHABLE();
         break;
     }
@@ -4359,7 +4360,8 @@ void LCodeGen::DoStoreKeyedExternalArray(LStoreKeyed* instr) {
       case FAST_HOLEY_SMI_ELEMENTS:
       case FAST_HOLEY_DOUBLE_ELEMENTS:
       case DICTIONARY_ELEMENTS:
-      case SLOPPY_ARGUMENTS_ELEMENTS:
+      case FAST_SLOPPY_ARGUMENTS_ELEMENTS:
+      case SLOW_SLOPPY_ARGUMENTS_ELEMENTS:
         UNREACHABLE();
         break;
     }