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...gt; the constrained intrinsics would be *less* necessary (I say "less" since > there are other problems, but hoisting is one of the significant ones). > > That said, our out-of-tree FPEnv mode attempts to do just that -- > selectively throttle unsafe optimizations. Barring any YDKWYDK's, I intend > to blow the doors off of the constrained intrinsics, performance-wise. :P > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20190821/24a0b818/attachment.html>

Hi all, During the review of https://reviews.llvm.org/D65997 an issue was revealed, which relates to the decision of how compiler should represents constrained floating point operations. If a floating point operation requires rounding mode or exception behavior different from the default, it should be represented by constrained intrinsic (