diff --git a/mlir/lib/Conversion/MathToLibm/MathToLibm.cpp b/mlir/lib/Conversion/MathToLibm/MathToLibm.cpp
--- a/mlir/lib/Conversion/MathToLibm/MathToLibm.cpp
+++ b/mlir/lib/Conversion/MathToLibm/MathToLibm.cpp
@@ -141,9 +141,11 @@
 void mlir::populateMathToLibmConversionPatterns(RewritePatternSet &patterns,
                                                 PatternBenefit benefit) {
   patterns.add<VecOpToScalarOp<math::Atan2Op>, VecOpToScalarOp<math::ExpM1Op>,
-               VecOpToScalarOp<math::TanhOp>>(patterns.getContext(), benefit);
+               VecOpToScalarOp<math::TanhOp>, VecOpToScalarOp<math::CosOp>,
+               VecOpToScalarOp<math::SinOp>>(patterns.getContext(), benefit);
   patterns.add<PromoteOpToF32<math::Atan2Op>, PromoteOpToF32<math::ExpM1Op>,
-               PromoteOpToF32<math::TanhOp>>(patterns.getContext(), benefit);
+               PromoteOpToF32<math::TanhOp>, PromoteOpToF32<math::CosOp>,
+               PromoteOpToF32<math::SinOp>>(patterns.getContext(), benefit);
   patterns.add<ScalarOpToLibmCall<math::Atan2Op>>(patterns.getContext(),
                                                   "atan2f", "atan2", benefit);
   patterns.add<ScalarOpToLibmCall<math::ErfOp>>(patterns.getContext(), "erff",
@@ -154,6 +156,10 @@
                                                  "tanh", benefit);
   patterns.add<ScalarOpToLibmCall<math::RoundOp>>(patterns.getContext(),
                                                   "roundf", "round", benefit);
+  patterns.add<ScalarOpToLibmCall<math::CosOp>>(patterns.getContext(), "cosf",
+                                                "cos", benefit);
+  patterns.add<ScalarOpToLibmCall<math::SinOp>>(patterns.getContext(), "sinf",
+                                                "sin", benefit);
 }
 
 namespace {
diff --git a/mlir/test/Conversion/MathToLibm/convert-to-libm.mlir b/mlir/test/Conversion/MathToLibm/convert-to-libm.mlir
--- a/mlir/test/Conversion/MathToLibm/convert-to-libm.mlir
+++ b/mlir/test/Conversion/MathToLibm/convert-to-libm.mlir
@@ -10,6 +10,10 @@
 // CHECK-DAG: @tanhf(f32) -> f32
 // CHECK-DAG: @round(f64) -> f64
 // CHECK-DAG: @roundf(f32) -> f32
+// CHECK-DAG: @cos(f64) -> f64
+// CHECK-DAG: @cosf(f32) -> f32
+// CHECK-DAG: @sin(f64) -> f64
+// CHECK-DAG: @sinf(f32) -> f32
 
 // CHECK-LABEL: func @tanh_caller
 // CHECK-SAME: %[[FLOAT:.*]]: f32
@@ -129,3 +133,27 @@
   // CHECK: return %[[FLOAT_RESULT]], %[[DOUBLE_RESULT]]
   return %float_result, %double_result : f32, f64
 }
+
+// CHECK-LABEL: func @cos_caller
+// CHECK-SAME: %[[FLOAT:.*]]: f32
+// CHECK-SAME: %[[DOUBLE:.*]]: f64
+func.func @cos_caller(%float: f32, %double: f64) -> (f32, f64)  {
+  // CHECK-DAG: %[[FLOAT_RESULT:.*]] = call @cosf(%[[FLOAT]]) : (f32) -> f32
+  %float_result = math.cos %float : f32
+  // CHECK-DAG: %[[DOUBLE_RESULT:.*]] = call @cos(%[[DOUBLE]]) : (f64) -> f64
+  %double_result = math.cos %double : f64
+  // CHECK: return %[[FLOAT_RESULT]], %[[DOUBLE_RESULT]]
+  return %float_result, %double_result : f32, f64
+}
+
+// CHECK-LABEL: func @sin_caller
+// CHECK-SAME: %[[FLOAT:.*]]: f32
+// CHECK-SAME: %[[DOUBLE:.*]]: f64
+func.func @sin_caller(%float: f32, %double: f64) -> (f32, f64)  {
+  // CHECK-DAG: %[[FLOAT_RESULT:.*]] = call @sinf(%[[FLOAT]]) : (f32) -> f32
+  %float_result = math.sin %float : f32
+  // CHECK-DAG: %[[DOUBLE_RESULT:.*]] = call @sin(%[[DOUBLE]]) : (f64) -> f64
+  %double_result = math.sin %double : f64
+  // CHECK: return %[[FLOAT_RESULT]], %[[DOUBLE_RESULT]]
+  return %float_result, %double_result : f32, f64
+}