Remove if inside contradictory if.

src/codegen-ia32.cc

 // Copyright 2006-2009 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 1359 matching lines @@
                                            overwrite_mode);
         operand->ToRegister();
         __ test(operand->reg(), Immediate(kSmiTagMask));
         deferred->enter()->Branch(not_zero, operand, not_taken);
         if (shift_value != 0) {
           Result answer = allocator()->Allocate();
           ASSERT(answer.is_valid());
           __ mov(answer.reg(), operand->reg());
           ASSERT(kSmiTag == 0);  // adjust code if not the case
           // We do no shifts, only the Smi conversion, if shift_value is 1.
-          if (shift_value == 0) {
-            __ sar(answer.reg(), kSmiTagSize);
-          } else if (shift_value > 1) {
+          if (shift_value > 1) {
             __ shl(answer.reg(), shift_value - 1);
           }
           // Convert int result to Smi, checking that it is in int range.
           ASSERT(kSmiTagSize == times_2);  // adjust code if not the case
           __ add(answer.reg(), Operand(answer.reg()));
           deferred->enter()->Branch(overflow, operand, not_taken);
           operand->Unuse();
           deferred->BindExit(&answer);
           frame_->Push(&answer);
         } else {
@@ skipping 5728 matching lines @@
 
   // Slow-case: Go through the JavaScript implementation.
   __ bind(&slow);
   __ InvokeBuiltin(Builtins::INSTANCE_OF, JUMP_FUNCTION);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal