AOT: Enable branch merging for checked smi comparisons

runtime/vm/intermediate_language_ia32.cc

 // Copyright (c) 2013, 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_IA32.
 #if defined(TARGET_ARCH_IA32)
 
 #include "vm/intermediate_language.h"
 
 #include "vm/compiler.h"
@@ skipping 2784 matching lines @@
   return NULL;
 }
 
 
 void CheckedSmiOpInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
   // Only for precompiled code, not on ia32 currently.
   UNIMPLEMENTED();
 }
 
 
+LocationSummary* CheckedSmiComparisonInstr::MakeLocationSummary(
+    Zone* zone, bool opt) const {
+  // Only for precompiled code, not on ia32 currently.
+  UNIMPLEMENTED();
+  return NULL;
+}
+
+
+Condition CheckedSmiComparisonInstr::EmitComparisonCode(
+    FlowGraphCompiler* compiler, BranchLabels labels) {
+  // Only for precompiled code, not on ia32 currently.
+  UNIMPLEMENTED();
+  return ZERO;
+}
+
+
+void CheckedSmiComparisonInstr::EmitBranchCode(FlowGraphCompiler* compiler,
+                                               BranchInstr* instr) {
+  // Only for precompiled code, not on ia32 currently.
+  UNIMPLEMENTED();
+}
+
+
+void CheckedSmiComparisonInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
+  // Only for precompiled code, not on ia32 currently.
+  UNIMPLEMENTED();
+}
+
+
 static bool IsSmiValue(const Object& constant, intptr_t value) {
   return constant.IsSmi() && (Smi::Cast(constant).Value() == value);
 }
 
 
 LocationSummary* BinarySmiOpInstr::MakeLocationSummary(Zone* zone,
                                                        bool opt) const {
   const intptr_t kNumInputs = 2;
   if (op_kind() == Token::kTRUNCDIV) {
     const intptr_t kNumTemps = 1;
@@ skipping 4145 matching lines @@
   __ Drop(1);
   __ popl(result);
 }
 
 
 }  // namespace dart
 
 #undef __
 
 #endif  // defined TARGET_ARCH_IA32