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Add cheddar_gpu copy op - #3629
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Adds cheddar_gpu.copy to the cheddar_gpu dialect for copying polynomial buffers and limb slices. As I was reviewing the mega-CL's details, I realized it's duplicating some bufferization work that could be reused from upstream MLIR. So this op will become the copy materialization op during bufferization, and a later change will upgrade all the ops in this dialect to support both destination-style tensor operands as well as memref operands. PiperOrigin-RevId: 1015875348
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Add cheddar_gpu copy op
Adds cheddar_gpu.copy to the cheddar_gpu dialect for copying polynomial buffers and limb slices.
As I was reviewing the mega-CL's details, I realized it's duplicating some bufferization work that could be reused from upstream MLIR. So this op will become the copy materialization op during bufferization, and a later change will upgrade all the ops in this dialect to support both destination-style tensor operands as well as memref operands.