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

[Sanjay Patel via Phabricator via llvm-commits]

spatel added reviewers: hfinkel, efriedma.
spatel added a comment.

I'm not familiar with how flags are being used in this layer, but union of flags doesn't match the way we deal with FMF in IR. If the fneg is strict (disregard the irrelevant 'arcp' in that last test), then it's invalid to assume that it inherits the 'nsz' property from its operand.


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

https://reviews.llvm.org/D63405