Add missing SMI checks to fix reliability bots

src/arm/stub-cache-arm.cc

Index: src/arm/stub-cache-arm.cc
diff --git a/src/arm/stub-cache-arm.cc b/src/arm/stub-cache-arm.cc
index db681936b891f32c79119dac51e83215593e474b..fea4fa5aa212b7ba8d4f2be1c08746fb78b8eef6 100644
--- a/src/arm/stub-cache-arm.cc
+++ b/src/arm/stub-cache-arm.cc
@@ -3098,6 +3098,9 @@ MaybeObject* KeyedLoadStubCompiler::CompileLoadFastElement(Map* receiver_map) {
   //  -- r0    : key
   //  -- r1    : receiver
   // -----------------------------------
+  Label miss;
+  __ JumpIfSmi(r1, &miss);
+
   MaybeObject* maybe_stub = KeyedLoadFastElementStub().TryGetCode();
   Code* stub;
   if (!maybe_stub->To(&stub)) return maybe_stub;
@@ -3107,6 +3110,7 @@ MaybeObject* KeyedLoadStubCompiler::CompileLoadFastElement(Map* receiver_map) {
                  Handle<Code>(stub),
                  DO_SMI_CHECK);
 
+  __ bind(&miss);
   Handle<Code> ic = isolate()->builtins()->KeyedLoadIC_Miss();
   __ Jump(ic, RelocInfo::CODE_TARGET);
 
@@ -3192,6 +3196,9 @@ MaybeObject* KeyedStoreStubCompiler::CompileStoreFastElement(
   //  -- lr    : return address
   //  -- r3    : scratch
   // -----------------------------------
+  Label miss;
+  __ JumpIfSmi(r1, &miss);
+
   bool is_js_array = receiver_map->instance_type() == JS_ARRAY_TYPE;
   MaybeObject* maybe_stub =
       KeyedStoreFastElementStub(is_js_array).TryGetCode();
@@ -3203,6 +3210,7 @@ MaybeObject* KeyedStoreStubCompiler::CompileStoreFastElement(
                  Handle<Code>(stub),
                  DO_SMI_CHECK);
 
+  __ bind(&miss);
   Handle<Code> ic = isolate()->builtins()->KeyedStoreIC_Miss();
   __ Jump(ic, RelocInfo::CODE_TARGET);