[PATCH] D67068: A instruction bitcast a constant, and get used across the basic block will generate additional COPY SDNode.The example as follow:

[zuojian lin via Phabricator via llvm-commits]

linzj added a comment.

In D67068#1654483 <https://reviews.llvm.org/D67068#1654483>, @lebedev.ri wrote:

> tests missing.
>  From the first look this fix seems rather ad-hoc.


Essentially it's a constant leaking problem. The bitcast instructions are generated by the "constant hoist" algorithm from LLVM. I does not write this snippet.


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https://reviews.llvm.org/D67068