[mlir][complex] Mark all supported operation illegal explicitly for complex to libm

[Lewuathe]

Summary

We can mark all supported operations illegal explicitly to ensure no convertible ops remain.

[frgossen]

Thanks!

mlir/lib/Conversion/ComplexToLibm/ComplexToLibm.cpp

void ConvertComplexToLibmPass::runOnOperation() {
   auto module = getOperation();
 
   RewritePatternSet patterns(&getContext());
   populateComplexToLibmConversionPatterns(patterns, /*benefit=*/1);
 
   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();
 }
 
 std::unique_ptr<OperationPass<ModuleOp>>
 mlir::createConvertComplexToLibmPass() {
   return std::make_unique<ConvertComplexToLibmPass>();
 }