Add check for non-smi to the IL and use it for class checks.

runtime/vm/intermediate_language_x64.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_X64.
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/intermediate_language.h"
 
 #include "lib/error.h"
@@ skipping 2096 matching lines @@
   return summary;
 }
 
 
 void CheckClassComp::EmitNativeCode(FlowGraphCompiler* compiler) {
   Register value = locs()->in(0).reg();
   Register temp = locs()->temp(0).reg();
   Label* deopt = compiler->AddDeoptStub(deopt_id(),
                                         kDeoptCheckClass);
   ASSERT(unary_checks().GetReceiverClassIdAt(0) != kSmiCid);
-  __ testq(value, Immediate(kSmiTagMask));
-  __ j(ZERO, deopt);
   __ LoadClassId(temp, value);
   Label is_ok;
   const intptr_t num_checks = unary_checks().NumberOfChecks();
   const bool use_near_jump = num_checks < 5;
   for (intptr_t i = 0; i < num_checks; i++) {
     __ cmpl(temp, Immediate(unary_checks().GetReceiverClassIdAt(i)));
     if (i == (num_checks - 1)) {
       __ j(NOT_EQUAL, deopt);
     } else {
       if (use_near_jump) {
@@ skipping 12 matching lines @@
   const intptr_t kNumTemps = 0;
   LocationSummary* summary =
       new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kNoCall);
   summary->set_in(0, Location::RequiresRegister());
   return summary;
 }
 
 
 void CheckSmiComp::EmitNativeCode(FlowGraphCompiler* compiler) {
   Register value = locs()->in(0).reg();
-  Label* deopt = compiler->AddDeoptStub(deopt_id(),
-                                        kDeoptCheckSmi);
+  Label* deopt = compiler->AddDeoptStub(deopt_id(), kDeoptCheckSmi);
   __ testq(value, Immediate(kSmiTagMask));
   __ j(NOT_ZERO, deopt);
 }
 
 
+LocationSummary* CheckNonSmiComp::MakeLocationSummary() const {
+  const intptr_t kNumInputs = 1;
+  const intptr_t kNumTemps = 0;
+  LocationSummary* summary =
+      new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kNoCall);
+  summary->set_in(0, Location::RequiresRegister());
+  return summary;
+}
+
+
+void CheckNonSmiComp::EmitNativeCode(FlowGraphCompiler* compiler) {
+  Register value = locs()->in(0).reg();
+  Label* deopt = compiler->AddDeoptStub(deopt_id(), kDeoptCheckNonSmi);
+  __ testl(value, Immediate(kSmiTagMask));
+  __ j(ZERO, deopt);
+}
+
+
 LocationSummary* CheckArrayBoundComp::MakeLocationSummary() const {
   return LocationSummary::Make(2,
                                Location::NoLocation(),
                                LocationSummary::kNoCall);
 }
 
 
 void CheckArrayBoundComp::EmitNativeCode(FlowGraphCompiler* compiler) {
   Register receiver = locs()->in(0).reg();
   Register index = locs()->in(1).reg();
@@ skipping 15 matching lines @@
   }
   __ j(ABOVE_EQUAL, deopt);
 }
 
 
 }  // namespace dart
 
 #undef __
 
 #endif  // defined TARGET_ARCH_X64