Fix DBC build.

runtime/vm/intermediate_language_dbc.cc

 // Copyright (c) 2016, 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_DBC.
 #if defined(TARGET_ARCH_DBC)
 
 #include "vm/intermediate_language.h"
 
 #include "vm/cpu.h"
@@ skipping 74 matching lines @@
   M(BinaryFloat64x2Op)                                                         \
   M(Float64x2Zero)                                                             \
   M(Float64x2Constructor)                                                      \
   M(Float64x2Splat)                                                            \
   M(Float32x4ToFloat64x2)                                                      \
   M(Float64x2ToFloat32x4)                                                      \
   M(Simd64x2Shuffle)                                                           \
   M(Float64x2ZeroArg)                                                          \
   M(Float64x2OneArg)                                                           \
   M(CheckedSmiOp)                                                              \
+  M(CheckedSmiComparison)                                                      \
 
 // Location summaries actually are not used by the unoptimizing DBC compiler
 // because we don't allocate any registers.
 static LocationSummary* CreateLocationSummary(
     Zone* zone,
     intptr_t num_inputs,
     Location output = Location::NoLocation(),
     LocationSummary::ContainsCall contains_call = LocationSummary::kNoCall,
     intptr_t num_temps = 0) {
   LocationSummary* locs = new(zone) LocationSummary(
@@ skipping 67 matching lines @@
 
 #define DEFINE_UNREACHABLE(Name)                                               \
   DEFINE_UNREACHABLE_MAKE_LOCATION_SUMMARY(Name)                               \
   DEFINE_UNREACHABLE_EMIT_NATIVE_CODE(Name)                                    \
 
 FOR_EACH_UNREACHABLE_INSTRUCTION(DEFINE_UNREACHABLE)
 
 #undef DEFINE_UNREACHABLE
 
 
+// Only used in AOT compilation.
+DEFINE_UNIMPLEMENTED_EMIT_BRANCH_CODE(CheckedSmiComparison)
+
+
 EMIT_NATIVE_CODE(InstanceOf, 2, Location::SameAsFirstInput(),
                  LocationSummary::kCall) {
   SubtypeTestCache& test_cache = SubtypeTestCache::Handle();
   if (!type().IsVoidType() && type().IsInstantiated()) {
     test_cache = SubtypeTestCache::New();
   }
 
   if (compiler->is_optimizing()) {
     __ Push(locs()->in(0).reg());  // Value.
     __ Push(locs()->in(1).reg());  // Instantiator type arguments.
@@ skipping 1767 matching lines @@
   __ IfULe(length, index);
   compiler->EmitDeopt(deopt_id(),
                       ICData::kDeoptCheckArrayBound,
                       (generalized_ ? ICData::kGeneralized : 0) |
                       (licm_hoisted_ ? ICData::kHoisted : 0));
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_DBC