[mlir][Vector][NFC] Add vector-transform-options flag to ConvertVectorToLLVMPass (#123491)

This flag enables the configuration of some transformation such as the
lowering of contractions and transposes. The default configuration
preserves the existing behavior.

Author: dcaballe

mlir/include/mlir/Conversion/Passes.td

@@ -1439,7 +1439,11 @@ def ConvertVectorToLLVMPass : Pass<"convert-vector-to-llvm"> {
     Option<"x86Vector", "enable-x86vector",
            "bool", /*default=*/"false",
            "Enables the use of X86Vector dialect while lowering the vector "
-	   "dialect.">
+	   "dialect.">,
+    Option<"vectorTransformsOptions", "vector-transform-options",
+           "vector::VectorTransformsOptions",
+           /*default=*/"vector::VectorTransformsOptions()",
+           "Options to lower some operations like contractions and transposes.">,
   ];
 }
 

mlir/include/mlir/Conversion/VectorToLLVM/ConvertVectorToLLVMPass.h

@@ -9,6 +9,7 @@
 #define MLIR_CONVERSION_VECTORTOLLVM_CONVERTVECTORTOLLVMPASS_H_
 
 #include "mlir/Conversion/VectorToLLVM/ConvertVectorToLLVM.h"
+#include "mlir/Dialect/Vector/Transforms/VectorTransforms.h"
 
 namespace mlir {
 class Pass;

mlir/lib/Conversion/VectorToLLVM/ConvertVectorToLLVMPass.cpp

@@ -69,12 +69,11 @@ void ConvertVectorToLLVMPass::runOnOperation() {
     populateVectorToVectorCanonicalizationPatterns(patterns);
     populateVectorBitCastLoweringPatterns(patterns);
     populateVectorBroadcastLoweringPatterns(patterns);
-    populateVectorContractLoweringPatterns(patterns, VectorTransformsOptions());
+    populateVectorContractLoweringPatterns(patterns, vectorTransformsOptions);
     populateVectorMaskOpLoweringPatterns(patterns);
     populateVectorShapeCastLoweringPatterns(patterns);
     populateVectorInterleaveLoweringPatterns(patterns);
-    populateVectorTransposeLoweringPatterns(patterns,
-                                            VectorTransformsOptions());
+    populateVectorTransposeLoweringPatterns(patterns, vectorTransformsOptions);
     // Vector transfer ops with rank > 1 should be lowered with VectorToSCF.
     populateVectorTransferLoweringPatterns(patterns, /*maxTransferRank=*/1);
     populateVectorMaskMaterializationPatterns(patterns,