Speculate on bitwise operators.

runtime/vm/aot_optimizer.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/aot_optimizer.h"
 
 #include "vm/bit_vector.h"
 #include "vm/branch_optimizer.h"
 #include "vm/cha.h"
 #include "vm/compiler.h"
@@ skipping 191 matching lines @@
     // to megamorphic call.
     return false;
   }
   GrowableArray<intptr_t> class_ids(call->ic_data()->NumArgsTested());
   ASSERT(call->ic_data()->NumArgsTested() <= call->ArgumentCount());
   for (intptr_t i = 0; i < call->ic_data()->NumArgsTested(); i++) {
     class_ids.Add(call->PushArgumentAt(i)->value()->Type()->ToCid());
   }
 
   const Token::Kind op_kind = call->token_kind();
-  if (Token::IsRelationalOperator(op_kind) ||
-      Token::IsEqualityOperator(op_kind) || Token::IsBinaryOperator(op_kind)) {
-    // Guess cid: if one of the inputs is a number assume that the other
-    // is a number of same type.
-    if (FLAG_guess_icdata_cid) {
+  if (FLAG_guess_icdata_cid) {
+    if (Token::IsBinaryBitwiseOperator(op_kind)) {
+      class_ids[0] = kSmiCid;
+      class_ids[1] = kSmiCid;
+    }
+    if (Token::IsRelationalOperator(op_kind) ||
+        Token::IsEqualityOperator(op_kind) ||
+        Token::IsBinaryOperator(op_kind)) {
+      // Guess cid: if one of the inputs is a number assume that the other
+      // is a number of same type.
       const intptr_t cid_0 = class_ids[0];
       const intptr_t cid_1 = class_ids[1];
       if ((cid_0 == kDynamicCid) && (IsNumberCid(cid_1))) {
         class_ids[0] = cid_1;
       } else if (IsNumberCid(cid_0) && (cid_1 == kDynamicCid)) {
         class_ids[1] = cid_0;
       }
     }
   }
 
@@ skipping 1562 matching lines @@
         Definition* left = instr->ArgumentAt(0);
         Definition* right = instr->ArgumentAt(1);
         CheckedSmiComparisonInstr* smi_op = new (Z)
             CheckedSmiComparisonInstr(instr->token_kind(), new (Z) Value(left),
                                       new (Z) Value(right), instr);
         ReplaceCall(instr, smi_op);
         return;
       }
       break;
     }
+    case Token::kSHL:
+    case Token::kSHR:
     case Token::kBIT_OR:
     case Token::kBIT_XOR:
     case Token::kBIT_AND:
     case Token::kADD:
     case Token::kSUB:
     case Token::kMUL: {
       if (HasOnlyTwoOf(*instr->ic_data(), kSmiCid) ||
           HasLikelySmiOperand(instr)) {
         Definition* left = instr->ArgumentAt(0);
         Definition* right = instr->ArgumentAt(1);
@@ skipping 357 matching lines @@
                                   FlowGraph::kEffect);
         current_iterator()->RemoveCurrentFromGraph();
       }
     }
   }
 }
 
 #endif  // DART_PRECOMPILER
 
 }  // namespace dart