Fix DoDeferredNumberTagU to keep the value in xmm1 instead of xmm0 on x64.

src/hydrogen.cc

 // Copyright 2012 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 8252 matching lines @@
     case Token::BIT_AND:
     case Token::BIT_OR:
       instr = HBitwise::NewHBitwise(zone(), expr->op(), context, left, right);
       break;
     case Token::SAR:
       instr = HSar::NewHSar(zone(), context, left, right);
       break;
     case Token::SHR:
       instr = HShr::NewHShr(zone(), context, left, right);
       if (FLAG_opt_safe_uint32_operations && instr->IsShr()) {
-        graph()->RecordUint32Instruction(instr);
+        bool can_be_shift_by_zero = true;
+        if (right->IsConstant()) {
+          HConstant* right_const = HConstant::cast(right);
+          if (right_const->HasInteger32Value() &&
+              (right_const->Integer32Value() & 0x1f) != 0) {
+            can_be_shift_by_zero = false;
+          }
+        }
+
+        if (can_be_shift_by_zero) graph()->RecordUint32Instruction(instr);
       }
       break;
     case Token::SHL:
       instr = HShl::NewHShl(zone(), context, left, right);
       break;
     default:
       UNREACHABLE();
   }
 
   // If we hit an uninitialized binary op stub we will get type info
@@ skipping 1651 matching lines @@
     }
   }
 
 #ifdef DEBUG
   if (graph_ != NULL) graph_->Verify(false);  // No full verify.
   if (allocator_ != NULL) allocator_->Verify();
 #endif
 }
 
 } }  // namespace v8::internal