Fix incorrect assumption on bit-and on ARM

src/arm/codegen-arm.cc

 // Copyright 2010 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1132 matching lines @@
     case Token::SHL:
       ASSERT(!reversed_);
       if (shift_value != 0) {
         __ mov(int32, Operand(int32, LSL, shift_value));
       }
       break;
     default: UNREACHABLE();
   }
   // Check that the *signed* result fits in a smi. Not necessary for AND, SAR
   // if the shift if more than 0 or SHR if the shit is more than 1.
-  if (!( (op_ == Token::AND) ||
+  if (!( (op_ == Token::AND && value_ >= 0) ||
         ((op_ == Token::SAR) && (shift_value > 0)) ||
         ((op_ == Token::SHR) && (shift_value > 1)))) {
     __ add(r3, int32, Operand(0x40000000), SetCC);
     __ b(mi, &result_not_a_smi);
   }
   __ mov(tos_register_, Operand(int32, LSL, kSmiTagSize));
   Exit();
 
   if (result_not_a_smi.is_linked()) {
     __ bind(&result_not_a_smi);
@@ skipping 240 matching lines @@
           new DeferredInlineSmiOperation(op, int_value, reversed, mode, tos);
         __ tst(tos, Operand(kSmiTagMask));
         deferred->JumpToNonSmiInput(ne);
         switch (op) {
           case Token::BIT_OR:  __ orr(tos, tos, Operand(value)); break;
           case Token::BIT_XOR: __ eor(tos, tos, Operand(value)); break;
           case Token::BIT_AND: __ And(tos, tos, Operand(value)); break;
           default: UNREACHABLE();
         }
         deferred->BindExit();
-        TypeInfo result_type =
-            (op == Token::BIT_AND) ? TypeInfo::Smi() : TypeInfo::Integer32();
+        TypeInfo result_type = TypeInfo::Integer32();
+        if (op == Token::BIT_AND && int_value >= 0) {
+          result_type = TypeInfo::Smi();
+        }
         frame_->EmitPush(tos, result_type);
       }
       break;
     }
 
     case Token::SHL:
       if (reversed) {
         ASSERT(both_sides_are_smi);
         int max_shift = 0;
         int max_result = int_value == 0 ? 1 : int_value;
@@ skipping 6010 matching lines @@
                BinaryOpIC::GetName(runtime_operands_type_));
   return name_;
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM