- no more Concrete ciphertext/plaintext types: they are represented using standard MLIR types (int/tensor)
- Technically BConcrete was renamed to Concrete, and old Concrete was
removed
- TFHE -> Concrete now takes into account the conversion of tensor of
ciphertext into tensors of an additional dimension (LWE dim)
- Bufferization now works in Concrete
- Old Concrete optimization were moved to TFHE
- Concrete is now the dialect that lowers to CAPI calls
- TFHE -> Concrete now uses OpConversionPattern and is much cleaner in
terms of type conversion
- Disabled tests for batching, as there was something weird about it:
batchable operations implemented in Concrete but pass run in FHELinalg
The batching pass passes operands to the batched operation as a flat,
one-dimensional vector produced through a `tensor.collapse_shape`
operation collapsing all dimensions of the original tensor of
operands. Similarly, the shape of the result vector of the batched
operation is expanded to the original shape afterwards using a
`tensor.expand_shape` operation.
The pass emits the `tensor.collapse_shape` and `tensor.expand_shape`
operations unconditionally, even for tensors, which already have only
a single dimension. This causes the verifiers of these operations to
fail in some cases, aborting the entire compilation process.
This patch lets the batching pass emit `tensor.collapse_shape` and
`tensor.expand_shape` for batched operands and batched results only if
the rank of the corresponding tensors is greater than one.
