[PATCH] D65542: [PeepholeOptimizer] Don't assume bitcast def always has input

[Matt Arsenault via Phabricator via llvm-commits]

arsenm added a comment.

In D65542#1631857 <https://reviews.llvm.org/D65542#1631857>, @jsji wrote:

> @arsenm Is this MIR test OK?


I think you should also keep the IR test, as it will still test the pattern change


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