[PATCH] D116952: [ConstantFolding] Flush folded denormals to zero when using fastmath

[David Candler via Phabricator via llvm-commits]

dcandler added a comment.

Thanks for highlighting that. Producing the appropriate result for the hardware was what I meant, so based on that I would have to rework this to handle different targets.

It doesn't look like constant folding currently has such target knowledge, and the only obvious solution I can see would be to use TargetTransformInfo to determine if the target should flush denormals from folding. However this would also mean passing TTI around much more in order to pass it down through to the constant folding functions wherever they get used.


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https://reviews.llvm.org/D116952