Add complete ElementKind information directly to Map for objects with elements.

src/arm/ic-arm.cc

Index: src/arm/ic-arm.cc
diff --git a/src/arm/ic-arm.cc b/src/arm/ic-arm.cc
index 4b6fccd176662d2c9ff435634f1378014a9f190f..a91d300b099494c8a53b872d7f5fc988cc1060e2 100644
--- a/src/arm/ic-arm.cc
+++ b/src/arm/ic-arm.cc
@@ -945,9 +945,7 @@ void KeyedLoadIC::GenerateGeneric(MacroAssembler* masm) {
 
   // Check the "has fast elements" bit in the receiver's map which is
   // now in r2.
-  __ ldrb(r3, FieldMemOperand(r2, Map::kBitField2Offset));
-  __ tst(r3, Operand(1 << Map::kHasFastElements));
-  __ b(eq, &check_number_dictionary);
+  __ CheckFastElements(r2, r3, &check_number_dictionary);
 
   GenerateFastArrayLoad(
       masm, receiver, key, r4, r3, r2, r0, NULL, &slow);