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

[Matt Arsenault via Phabricator via llvm-commits]

arsenm added a comment.

In D63405#1546507 <https://reviews.llvm.org/D63405#1546507>, @mcberg2017 wrote:

> Ok, with the constraint like in the DAG:
>
>   as Unsafe or nsz on the Op
>   
>    SDAG is preserving the Op flags or in this case the MI flags in place of SrcMI.


I don't follow. I don't see why the source should matter. The DAG currently does not preserve the flags here


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

https://reviews.llvm.org/D63405