Commits on Jul 26, 2024

1. [mlir][ArmSME] Pattern to swap shape_cast(tranpose) with transpose(sh… …

   …ape_cast)
   
   This applies when the shape_cast is simply for dropping unit dims, and
   the result rank is >= 2.
   
   This simplifies the transpose making it possible for other ArmSME
   legalization patterns to handle it.
   
   Example:
   
   ```mlir
   %0 = vector.transpose %vector, [3, 0, 1, 2]
          : vector<1x1x4x[4]xf32> to vector<[4]x1x1x4xf32>
   %1 = vector.shape_cast %0 : vector<[4]x1x1x4xf32> to vector<[4]x4xf32>
   ```
   
   ```mlir
   %0 = vector.shape_cast %arg0 : vector<1x1x4x[4]xf32> to vector<4x[4]xf32>
   %1 = vector.transpose %0, [1, 0] : vector<4x[4]xf32> to vector<[4]x4xf32>
   ```

   

   MacDue committed Jul 26, 2024
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2. Review fixups

   

   MacDue committed Jul 26, 2024
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