[mlir][vector] Update tests for xfer permutation lowering (4/N)

* Document the remaining test cases, add a note that these are
  exercising `TransferOpReduceRank` (addresses an existing TODO).
* Add missing cases (fixed-width vectors).
* Remove scalable from the negative test (the masked case) - this test
  will also fail with fixed-width vectors. For consistency, lets make
  all negative test use fixed-width vectors.

Author: banach-space

mlir/test/Dialect/Vector/vector-transfer-permutation-lowering.mlir

@@ -363,17 +363,40 @@ func.func @xfer_read_minor_identity_transposed_masked_scalable(
 }
 
 ///----------------------------------------------------------------------------------------
-/// vector.transfer_read
+/// [Pattern: TransferOpReduceRank]
+///
+/// IN: vector.transfer_read (minor identity map + broadcast)
+/// OUT: vector.transfer_read + vector.broadcast
 ///----------------------------------------------------------------------------------------
 /// TODO: Review and categorize
 
+// CHECK-LABEL:   func.func @xfer_read_minor_identitiy_bcast_dims
+//  CHECK-SAME:     %[[MEM:.*]]: memref<?x?x?x?xf32>, %[[IDX:.*]]: index) -> vector<8x4x2x3xf32> {
+//       CHECK:     %[[T_READ:.*]] = vector.transfer_read %[[MEM]][%[[IDX]], %[[IDX]], %[[IDX]], %[[IDX]]]{{.*}} permutation_map = #[[$MAP]]} : memref<?x?x?x?xf32>, vector<4x2x3xf32>
+//       CHECK:     %[[BC:.*]] = vector.broadcast %[[T_READ]] : vector<4x2x3xf32> to vector<8x4x2x3xf32>
+//       CHECK:     return %[[BC]] : vector<8x4x2x3xf32>
+func.func @xfer_read_minor_identitiy_bcast_dims(
+    %mem: memref<?x?x?x?xf32>,
+    %idx: index) -> vector<8x4x2x3xf32> {
+
+  %pad = arith.constant 0.000000e+00 : f32
+
+  %res = vector.transfer_read %mem[%idx, %idx, %idx, %idx], %pad {
+    in_bounds = [true, true, true, true],
+    permutation_map = affine_map<(d0, d1, d2, d3) -> (0, d1, 0, d3)>
+  } : memref<?x?x?x?xf32>, vector<8x4x2x3xf32>
+
+  return %res : vector<8x4x2x3xf32>
+}
+
 // CHECK-LABEL:   func.func @xfer_read_minor_identitiy_bcast_dims_scalable
 //  CHECK-SAME:     %[[MEM:.*]]: memref<?x?x?x?xf32>, %[[IDX:.*]]: index) -> vector<8x[4]x2x3xf32> {
 //       CHECK:     %[[T_READ:.*]] = vector.transfer_read %[[MEM]][%[[IDX]], %[[IDX]], %[[IDX]], %[[IDX]]]{{.*}} permutation_map = #[[$MAP]]} : memref<?x?x?x?xf32>, vector<[4]x2x3xf32>
 //       CHECK:     %[[BC:.*]] = vector.broadcast %[[T_READ]] : vector<[4]x2x3xf32> to vector<8x[4]x2x3xf32>
 //       CHECK:     return %[[BC]] : vector<8x[4]x2x3xf32>
 func.func @xfer_read_minor_identitiy_bcast_dims_scalable(
-    %mem: memref<?x?x?x?xf32>, %idx: index) -> vector<8x[4]x2x3xf32> {
+    %mem: memref<?x?x?x?xf32>,
+    %idx: index) -> vector<8x[4]x2x3xf32> {
 
   %pad = arith.constant 0.000000e+00 : f32
 
@@ -385,31 +408,57 @@ func.func @xfer_read_minor_identitiy_bcast_dims_scalable(
   return %res : vector<8x[4]x2x3xf32>
 }
 
+// CHECK-LABEL:   func.func @xfer_read_minor_identitiy_bcast_dims_with_mask
+//  CHECK-SAME:     %[[MEM:.*]]: memref<?x?x?x?xf32>
+//  CHECK-SAME:     %[[MASK:.*]]: vector<4x3xi1>
+//  CHECK-SAME:     %[[IDX:.*]]: index) -> vector<8x4x2x3xf32>
+//       CHECK:     %[[PASS_THROUGH:.*]] = arith.constant 0.000000e+00 : f32
+//       CHECK:     %[[T_READ:.*]] = vector.transfer_read %[[MEM]][%[[IDX]], %[[IDX]], %[[IDX]], %[[IDX]]], %[[PASS_THROUGH]], %[[MASK]]{{.*}} permutation_map = #[[$MAP]]} : memref<?x?x?x?xf32>, vector<4x2x3xf32>
+//       CHECK:     %[[BC:.*]] = vector.broadcast %[[T_READ]] : vector<4x2x3xf32> to vector<8x4x2x3xf32>
+//       CHECK:     return %[[BC]] : vector<8x4x2x3xf32>
+func.func @xfer_read_minor_identitiy_bcast_dims_with_mask(
+    %mem: memref<?x?x?x?xf32>,
+    %mask: vector<4x3xi1>,
+    %idx: index) -> vector<8x4x2x3xf32> {
+
+  %pad = arith.constant 0.000000e+00 : f32
+
+  %res = vector.transfer_read %mem[%idx, %idx, %idx, %idx], %pad, %mask {
+    in_bounds = [true, true, true, true],
+    permutation_map = affine_map<(d0, d1, d2, d3) -> (0, d1, 0, d3)>
+  } : memref<?x?x?x?xf32>, vector<8x4x2x3xf32>
+
+  return %res : vector<8x4x2x3xf32>
+}
+
 // Masked version is not supported
 
 // CHECK-LABEL:   func.func @xfer_read_minor_identitiy_bcast_dims_masked
 //  CHECK-SAME:     %[[MEM:.*]]: memref<?x?x?x?xf32>,
-//  CHECK-SAME:     %[[MASK:.*]]: vector<[4]x3xi1>
-//  CHECK-SAME:     %[[IDX:.*]]: index) -> vector<8x[4]x2x3xf32> {
+//  CHECK-SAME:     %[[MASK:.*]]: vector<4x3xi1>
+//  CHECK-SAME:     %[[IDX:.*]]: index) -> vector<8x4x2x3xf32> {
 //   CHECK-NOT:     vector.broadcast
-//       CHECK:     vector.mask %[[MASK]] { vector.transfer_read %[[MEM]]{{.*}} : memref<?x?x?x?xf32>, vector<8x[4]x2x3xf32> } : vector<[4]x3xi1> -> vector<8x[4]x2x3xf32>
+//       CHECK:     vector.mask %[[MASK]] { vector.transfer_read %[[MEM]]{{.*}} : memref<?x?x?x?xf32>, vector<8x4x2x3xf32> } : vector<4x3xi1> -> vector<8x4x2x3xf32>
 func.func @xfer_read_minor_identitiy_bcast_dims_masked(
     %mem: memref<?x?x?x?xf32>,
-    %mask: vector<[4]x3xi1>,
-    %idx: index) -> vector<8x[4]x2x3xf32> {
+    %mask: vector<4x3xi1>,
+    %idx: index) -> vector<8x4x2x3xf32> {
 
   %pad = arith.constant 0.000000e+00 : f32
 
   %res = vector.mask %mask {
     vector.transfer_read %mem[%idx, %idx, %idx, %idx], %pad {
       in_bounds = [true, true, true, true],
       permutation_map = affine_map<(d0, d1, d2, d3) -> (0, d1, 0, d3)>
-    } : memref<?x?x?x?xf32>, vector<8x[4]x2x3xf32>
-  } : vector<[4]x3xi1> -> vector<8x[4]x2x3xf32>
+    } : memref<?x?x?x?xf32>, vector<8x4x2x3xf32>
+  } : vector<4x3xi1> -> vector<8x4x2x3xf32>
 
-  return %res : vector<8x[4]x2x3xf32>
+  return %res : vector<8x4x2x3xf32>
 }
 
+///----------------------------------------------------------------------------------------
+//  TD sequence
+///----------------------------------------------------------------------------------------
 module attributes {transform.with_named_sequence} {
   transform.named_sequence @__transform_main(%module_op: !transform.any_op {transform.readonly}) {
     %f = transform.structured.match ops{["func.func"]} in %module_op