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Mehdi Amini d5397f4efe Return nullptr on Region::getContainingOperation()/getContainingFunction() instead of asserting
This avoids crashing when trying to dump an operation nested in a region that isn't yet attached to an operation, which is quite useful when debugging.

    This alone won't be enough to print an unlink Operation, it'll display `<<UNLINKED INSTRUCTION>>`.

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PiperOrigin-RevId: 249496388
2019-06-01 19:56:43 -07:00
mlir Return nullptr on Region::getContainingOperation()/getContainingFunction() instead of asserting 2019-06-01 19:56:43 -07:00