Federico Lebrón d867be5de3 Allow Dialects to be initialized via nullptr. ...

This allows Dialect to follow the MLIR style of nullable objects, and in fact is expected by `Dialect::operator bool() const` which already tests whether `def == nullptr`. This just wasn't a reachable situation, because the constructor was dereferencing the pointer unconditionally.

Reviewed By: rriddle

Differential Revision: https://reviews.llvm.org/D86807

2020-09-10 19:14:53 +00:00

2.6 KiB

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