Narrow result cid and type of BinarySmiOp to be always smi.

runtime/vm/intermediate_language.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/intermediate_language.h"
 
 #include "vm/bit_vector.h"
 #include "vm/dart_entry.h"
 #include "vm/flow_graph_allocator.h"
 #include "vm/flow_graph_builder.h"
@@ skipping 1305 matching lines @@
   return AbstractType::null();
 }
 
 
 RawAbstractType* CheckStackOverflowInstr::CompileType() const {
   return AbstractType::null();
 }
 
 
 RawAbstractType* BinarySmiOpInstr::CompileType() const {
-  return (op_kind() == Token::kSHL) ? Type::IntType() : Type::SmiType();
+  return Type::SmiType();
 }
 
 
 intptr_t BinarySmiOpInstr::ResultCid() const {
-  return (op_kind() == Token::kSHL) ? kDynamicCid : kSmiCid;
+  return kSmiCid;
 }
 
 
 bool BinarySmiOpInstr::CanDeoptimize() const {
   switch (op_kind()) {
     case Token::kBIT_AND:
     case Token::kBIT_OR:
     case Token::kBIT_XOR:
       return false;
     case Token::kSHR: {
@@ skipping 1411 matching lines @@
     default:
       UNREACHABLE();
       return -1;
   }
 }
 
 
 #undef __
 
 }  // namespace dart