Do not use ranges after range analysis.

src/x64/lithium-x64.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 161 matching lines @@
 
 bool LGoto::HasInterestingComment(LCodeGen* gen) const {
   return !gen->IsNextEmittedBlock(block_id());
 }
 
 
 template<int R>
 bool LTemplateResultInstruction<R>::MustSignExtendResult(
     LPlatformChunk* chunk) const {
   HValue* hvalue = this->hydrogen_value();
-
-  if (hvalue == NULL) return false;
-  if (!hvalue->representation().IsInteger32()) return false;
-  if (hvalue->HasRange() && !hvalue->range()->CanBeNegative()) return false;
-
-  return chunk->GetDehoistedKeyIds()->Contains(hvalue->id());
+  return hvalue != NULL &&
+      hvalue->representation().IsInteger32() &&
+      chunk->GetDehoistedKeyIds()->Contains(hvalue->id());
 }
 
 
 void LGoto::PrintDataTo(StringStream* stream) {
   stream->Add("B%d", block_id());
 }
 
 
 void LBranch::PrintDataTo(StringStream* stream) {
   stream->Add("B%d | B%d on ", true_block_id(), false_block_id());
@@ skipping 2405 matching lines @@
   LOperand* index = UseTempRegister(instr->index());
   LLoadFieldByIndex* load = new(zone()) LLoadFieldByIndex(object, index);
   LInstruction* result = DefineSameAsFirst(load);
   return AssignPointerMap(result);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64