[PATCH] D53157: Teach the IRBuilder about constrained fadd and friends

Cameron McInally via Phabricator via cfe-commits cfe-commits at lists.llvm.org
Thu Nov 8 11:41:15 PST 2018

cameron.mcinally added a comment.

In https://reviews.llvm.org/D53157#1291964, @kpn wrote:

> I don't expect anyone would need to switch between constrained and regular floating point at an instruction level of granularity.

The Standard allows for this (to some degree). E.g. FENV_ACCESS can be toggled between nested compound statements.

Also, some AVX512 hardware instructions have explicit SAE and RM operands.


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