Tag length of FixedArrayBase and smi-array[x] as smi representation

src/x64/lithium-codegen-x64.cc

 // Copyright 2013 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 4893 matching lines @@
     // deoptimize.
     __ andl(result_reg, Immediate(1));
     DeoptimizeIf(not_zero, instr->environment());
     __ bind(&done);
   }
   __ Integer32ToSmi(result_reg, result_reg);
   DeoptimizeIf(overflow, instr->environment());
 }
 
 
+void LCodeGen::DoCheckSmiAndReturn(LCheckSmiAndReturn* instr) {
+  LOperand* input = instr->value();
+  Condition cc = masm()->CheckSmi(ToRegister(input));
+  DeoptimizeIf(NegateCondition(cc), instr->environment());
+}
+
+
 void LCodeGen::DoCheckSmi(LCheckSmi* instr) {
   LOperand* input = instr->value();
   Condition cc = masm()->CheckSmi(ToRegister(input));
   DeoptimizeIf(NegateCondition(cc), instr->environment());
 }
 
 
 void LCodeGen::DoCheckNonSmi(LCheckNonSmi* instr) {
   LOperand* input = instr->value();
   Condition cc = masm()->CheckSmi(ToRegister(input));
@@ skipping 765 matching lines @@
                                FixedArray::kHeaderSize - kPointerSize));
   __ bind(&done);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64