[XeGPUToVC] Add target based legality check for MathToVC patterns ear… (

#950)

[XeGPUToVC] Add target based legality check for MathToVC patterns early in the pass.

Configuring the legality for MathToVC pass has to be done early.
Since, XeGPUToVC makes some arith ops dynamically legal in the target environment.
Making the whole dialect legal (needed for MathToVC) has to be done before conditionally making some ops legal.

Also add MathToVC as the link target for the XeGPUToVC pass.

lib/Conversion/XeGPUToVC/CMakeLists.txt

@@ -11,6 +11,7 @@ add_imex_conversion_library(IMEXXeGPUToVC
   #LINK_COMPONENTS
 
   LINK_LIBS PUBLIC
+  IMEXMathToVC
   MLIRIR
   MLIRSupport
   # MLIRTransforms

lib/Conversion/XeGPUToVC/XeGPUToVC.cpp

@@ -865,6 +865,9 @@ struct XeGPUToVCPass : public imex::impl::ConvertXeGPUToVCBase<XeGPUToVCPass> {
     RewritePatternSet patterns(&getContext());
     ConversionTarget target(getContext());
 
+    // Configure the legality of the conversion target for MathToVC patterns.
+    configureMathToVCConversionLegality(target);
+
     target.addLegalDialect<func::FuncDialect, arith::ArithDialect,
                            memref::MemRefDialect, vector::VectorDialect>();
     target.addIllegalDialect<xegpu::XeGPUDialect>();
@@ -960,8 +963,6 @@ struct XeGPUToVCPass : public imex::impl::ConvertXeGPUToVCBase<XeGPUToVCPass> {
 
     populateMathToVCPatterns(typeConverter, patterns);
 
-    configureMathToVCConversionLegality(target);
-
     if (failed(applyPartialConversion(m, target, std::move(patterns))))
       return signalPassFailure();
   }