diff --git a/compilation/KernelTranslation/src/x86/performance.cpp b/compilation/KernelTranslation/src/x86/performance.cpp
index 06a9cba..8d22abd 100644
--- a/compilation/KernelTranslation/src/x86/performance.cpp
+++ b/compilation/KernelTranslation/src/x86/performance.cpp
@@ -47,43 +47,5 @@ void performance_optimization(llvm::Module *M) {
       }
     }
   }
-
-  llvm::legacy::PassManager Passes;
-
-  // add target machine info
-  llvm::Triple triple("x86_64-unknown-linux-gnu");
-
-  std::string Error;
-  const Target *TheTarget = TargetRegistry::lookupTarget("", triple, Error);
-  if (!TheTarget) {
-    printf("Error: %s\n", Error.c_str());
-    assert(0);
-  }
-  llvm::TargetOptions Options;
-  Options.FloatABIType = FloatABI::Hard;
-
-  TargetMachine *TM = TheTarget->createTargetMachine(
-      triple.getTriple(), llvm::sys::getHostCPUName().str(), StringRef("+m,+f"),
-      Options, Reloc::PIC_, CodeModel::Small, CodeGenOpt::Aggressive);
-  assert(TM && "No Machine Information\n");
-
-  Passes.add(createTargetTransformInfoWrapperPass(TM->getTargetIRAnalysis()));
-
-  TargetLibraryInfoImpl TLII(triple);
-  TLII.disableAllFunctions();
-  Passes.add(new TargetLibraryInfoWrapperPass(TLII));
-
-  // Add O3 optimization
-  llvm::PassManagerBuilder Builder;
-  Builder.OptLevel = 3;
-  Builder.SizeLevel = 0;
-
-  Builder.LoopVectorize = true;
-  Builder.SLPVectorize = true;
-
-  Builder.VerifyInput = true;
-  Builder.VerifyOutput = true;
-
-  Builder.populateModulePassManager(Passes);
-  Passes.run(*M);
+  return;
 }