Allow smi comparisons to have constant operands.

runtime/vm/flow_graph_compiler_x64.h

 // 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.
 
 #ifndef VM_FLOW_GRAPH_COMPILER_X64_H_
 #define VM_FLOW_GRAPH_COMPILER_X64_H_
 
 #ifndef VM_FLOW_GRAPH_COMPILER_H_
 #error Include flow_graph_compiler.h instead of flow_graph_compiler_x64.h.
 #endif
@@ skipping 190 matching lines @@
     if (current_block_ == NULL) {
       return CatchClauseNode::kInvalidTryIndex;
     }
     return current_block_->try_index();
   }
 
   // Returns true if the generated code does not call other Dart code or
   // runtime. Only deoptimization is allowed to occur. Closures are not leaf.
   bool IsLeaf() const;
 
+  static Condition FlipCondition(Condition condition);
+
+  static bool EvaluateCondition(Condition condition, intptr_t l, intptr_t r);
+
  private:
   void GenerateDeferredCode();
 
   void EmitInstructionPrologue(Instruction* instr);
   void EmitInstructionEpilogue(Instruction* instr);
 
   // Emit code to load a Value into register 'dst'.
   void LoadValue(Register dst, Value* value);
 
   void EmitStaticCall(const Function& function,
@@ skipping 96 matching lines @@
   // that should be used when deoptimizing we store it in this variable.
   // In future AddDeoptStub should be moved out of the instruction template.
   Environment* pending_deoptimization_env_;
 
   DISALLOW_COPY_AND_ASSIGN(FlowGraphCompiler);
 };
 
 }  // namespace dart
 
 #endif  // VM_FLOW_GRAPH_COMPILER_X64_H_