message: Erase for gen
diff: @@ -5381,6 +5381,10 @@ restart:
  modifiedAny = true;
  goto restart;
  }
  + } else if (func && func->getName() == "llvm.prefetch") {
  + ci->eraseFromParent();
  + modifiedAny = true;
  + goto restart;
  }
  }
  }
  