[PATCH] D63405: GlobalISel: Don't lose fneg flags when lowering to fsub

[Michael Berg via Phabricator via llvm-commits]

mcberg2017 added a comment.

I am saying you have it right Matt for using MI flags, but we should guard folding based on Unsafe or nsz in the Flags.


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  https://reviews.llvm.org/D63405/new/

https://reviews.llvm.org/D63405