diff --git a/llvm/lib/Target/X86/X86TargetMachine.cpp b/llvm/lib/Target/X86/X86TargetMachine.cpp
index 5dfa87b..773438d 100644
--- a/llvm/lib/Target/X86/X86TargetMachine.cpp
+++ b/llvm/lib/Target/X86/X86TargetMachine.cpp
@@ -269,6 +269,9 @@
   addPass(createAtomicExpandPass(&getX86TargetMachine()));
 
   TargetPassConfig::addIRPasses();
+
+  if (TM->getOptLevel() != CodeGenOpt::None)
+    addPass(createInterleavedAccessPass(TM));
 }
 
 bool X86PassConfig::addInstSelector() {