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616aff126c
PR #112292 added support for vectors to the integer range inference interface and analysis, but didn't update the getDestWidth() method. This caused crashes when trying to infer the ranges of `arith.extsi` with vector inputs, as the code would try to sign-extend a N-bit value to a 0-bit one, which would assert and crash. This commit fixes the issue by adding a getElementTypeOrSelf().