Add missing SMI checks to fix reliability bots

src/x64/stub-cache-x64.cc

Index: src/x64/stub-cache-x64.cc
diff --git a/src/x64/stub-cache-x64.cc b/src/x64/stub-cache-x64.cc
index 143d8d8697ee19b159837b8c2896e2b0c4e80eb4..71ea4ee34bad750a636507f2acedfde5d1b3409e 100644
--- a/src/x64/stub-cache-x64.cc
+++ b/src/x64/stub-cache-x64.cc
@@ -2501,6 +2501,9 @@ MaybeObject* KeyedStoreStubCompiler::CompileStoreFastElement(
   //  -- rdx    : receiver
   //  -- rsp[0] : return address
   // -----------------------------------
+  Label miss;
+  __ JumpIfSmi(rdx, &miss);
+
   bool is_js_array = receiver_map->instance_type() == JS_ARRAY_TYPE;
   MaybeObject* maybe_stub =
       KeyedStoreFastElementStub(is_js_array).TryGetCode();
@@ -2511,6 +2514,7 @@ MaybeObject* KeyedStoreStubCompiler::CompileStoreFastElement(
                  Handle<Code>(stub),
                  DO_SMI_CHECK);
 
+  __ bind(&miss);
   Handle<Code> ic = isolate()->builtins()->KeyedStoreIC_Miss();
   __ jmp(ic, RelocInfo::CODE_TARGET);
 
@@ -2959,6 +2963,9 @@ MaybeObject* KeyedLoadStubCompiler::CompileLoadFastElement(Map* receiver_map) {
   //  -- rdx    : receiver
   //  -- rsp[0] : return address
   // -----------------------------------
+  Label miss;
+  __ JumpIfSmi(rdx, &miss);
+
   MaybeObject* maybe_stub = KeyedLoadFastElementStub().TryGetCode();
   Code* stub;
   if (!maybe_stub->To(&stub)) return maybe_stub;
@@ -2967,6 +2974,7 @@ MaybeObject* KeyedLoadStubCompiler::CompileLoadFastElement(Map* receiver_map) {
                  Handle<Code>(stub),
                  DO_SMI_CHECK);
 
+  __ bind(&miss);
   Handle<Code> ic = isolate()->builtins()->KeyedLoadIC_Miss();
   __ jmp(ic, RelocInfo::CODE_TARGET);