diff --git a/mlir/lib/Conversion/ComplexToLibm/ComplexToLibm.cpp b/mlir/lib/Conversion/ComplexToLibm/ComplexToLibm.cpp
--- a/mlir/lib/Conversion/ComplexToLibm/ComplexToLibm.cpp
+++ b/mlir/lib/Conversion/ComplexToLibm/ComplexToLibm.cpp
@@ -131,7 +131,8 @@
   ConversionTarget target(getContext());
   target.addLegalDialect<func::FuncDialect>();
   target.addIllegalOp<complex::PowOp, complex::SqrtOp, complex::TanhOp,
-                      complex::AbsOp, complex::AngleOp>();
+                      complex::CosOp, complex::SinOp, complex::ConjOp,
+                      complex::LogOp, complex::AbsOp, complex::AngleOp>();
   if (failed(applyPartialConversion(module, target, std::move(patterns))))
     signalPassFailure();
 }