| Index: src/x64/lithium-x64.cc
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| diff --git a/src/x64/lithium-x64.cc b/src/x64/lithium-x64.cc
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| index 8ac73078e58a75604eb568bccbfc995cfcd06509..517870ffd420b8e1acec1e3adcc99ca13ffa2ac9 100644
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| --- a/src/x64/lithium-x64.cc
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| +++ b/src/x64/lithium-x64.cc
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| @@ -1191,6 +1191,11 @@ LInstruction* LChunkBuilder::DoPushArgument(HPushArgument* instr) {
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|  }
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|  
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|  
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| +LInstruction* LChunkBuilder::DoThisFunction(HThisFunction* instr) {
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| +  return instr->HasNoUses() ? NULL : DefineAsRegister(new LThisFunction);
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| +}
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| +
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| +
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|  LInstruction* LChunkBuilder::DoContext(HContext* instr) {
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|    return instr->HasNoUses() ? NULL : DefineAsRegister(new LContext);
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|  }
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| 
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