[PATCH] D105836: [AMDGPU] Add TII::isAmbientPhysRegUse() to allow VOP rematerialization

[Krzysztof Parzyszek via Phabricator via llvm-commits]

kparzysz added a comment.

Yes, that's what I meant.  I.e. not "it this register always rematerializable", but "it this register rematerializable in this situation".

It will require more work, because we may need to insert instructions that restore the value of that physical register, and currently that's not happening.


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  https://reviews.llvm.org/D105836/new/

https://reviews.llvm.org/D105836