llvm-project

345ca6a6 - [mlir][Transforms] Dialect conversion: extra signature conversion check (#117471)

[mlir][Transforms] Dialect conversion: extra signature conversion check (#117471) This commit adds an extra assertion to `applySignatureConversion` to prevent incorrect API usage: The same block cannot be converted multiple times. That would mess with the underlying conversion value mapping. (Mappings would be overwritten.) This is similar to op replacements: The same op cannot be replaced multiple times. To simplify the check, `BlockTypeConversionRewrite::block` now stores the original block. The new block is stored in an extra field. (It used to be the other way around.) This commit is in preparation of adding 1:N support to the conversion value mapping. Before making any further changes to the mapping infrastructure, I'd like to make sure that the code base around it (that uses the mapping) is robust.