[mlir][linalg] Remove the test-linalg-to-vector-patterns option

This patch removes the `test-linalg-to-vector-patterns` option from the
`-test-linalg-transform-patterns=` test flag. It was only used in one
test, where a more specialized transform dialect op can be used instead:

* `transform.apply_patterns.linalg.pad_vectorization`

While we could preserve `test-linalg-to-vector-patterns`, it's better to
rely on finer-grained transformations — this way, we know exactly what
is being run and tested. Now that its only use has been removed, it
feels natural to delete `test-linalg-to-vector-patterns`.

Author: banach-space

mlir/test/Integration/Dialect/Linalg/CPU/test-padtensor.mlir

@@ -1,4 +1,4 @@
-// RUN: mlir-opt %s -test-linalg-transform-patterns=test-linalg-to-vector-patterns \
+// RUN: mlir-opt %s -transform-interpreter -test-transform-dialect-erase-schedule \
 // RUN: -one-shot-bufferize="bufferize-function-boundaries" \
 // RUN: -buffer-deallocation-pipeline -convert-bufferization-to-memref \
 // RUN: -convert-linalg-to-loops -convert-scf-to-cf -expand-strided-metadata \
@@ -34,4 +34,15 @@ func.func @main() {
   return
 }
 
+module attributes {transform.with_named_sequence} {
+  transform.named_sequence @__transform_main(%arg1: !transform.any_op {transform.readonly}) {
+    %func_op = transform.structured.match ops{["func.func"]} in %arg1 : (!transform.any_op) -> !transform.op<"func.func">
+
+    transform.apply_patterns to %func_op {
+      transform.apply_patterns.linalg.pad_vectorization
+    } : !transform.op<"func.func">
+    transform.yield
+  }
+}
+
 func.func private @printMemrefF32(%ptr : tensor<*xf32>)

mlir/test/lib/Dialect/Linalg/TestLinalgTransforms.cpp

@@ -65,11 +65,6 @@ struct TestLinalgTransforms
       llvm::cl::desc(
           "Test a fused pass that forwards memref.copy to vector.transfer"),
       llvm::cl::init(false)};
-  Option<bool> testGenericToVectorPattern{
-      *this, "test-linalg-to-vector-patterns",
-      llvm::cl::desc("Test a set of patterns that rewrite a linalg contraction "
-                     "in vector.contract form"),
-      llvm::cl::init(false)};
   Option<bool> testDecomposePadTensor{
       *this, "test-decompose-pad-tensor",
       llvm::cl::desc("Test transform pad tensor by copying with generic ops"),
@@ -166,15 +161,6 @@ static void applyVectorTransferForwardingPatterns(func::FuncOp funcOp) {
   (void)applyPatternsGreedily(funcOp, std::move(forwardPattern));
 }
 
-static void applyLinalgToVectorPatterns(func::FuncOp funcOp) {
-  RewritePatternSet patterns(funcOp.getContext());
-  auto *ctx = funcOp.getContext();
-  patterns.add<CopyVectorizationPattern>(ctx);
-  populatePadOpVectorizationPatterns(patterns);
-  populateConvolutionVectorizationPatterns(patterns);
-  (void)applyPatternsGreedily(funcOp, std::move(patterns));
-}
-
 static void applyDecomposePadPatterns(func::FuncOp funcOp) {
   RewritePatternSet patterns(funcOp.getContext());
   patterns.add<DecomposePadOpPattern>(funcOp.getContext());
@@ -254,8 +240,6 @@ void TestLinalgTransforms::runOnOperation() {
     return applyPatterns(getOperation());
   if (testVectorTransferForwardingPatterns)
     return applyVectorTransferForwardingPatterns(getOperation());
-  if (testGenericToVectorPattern)
-    return applyLinalgToVectorPatterns(getOperation());
   if (testDecomposePadTensor)
     return applyDecomposePadPatterns(getOperation());
   if (testDecomposeTensorPackOp)