[PATCH] D39304: [IR] redefine 'reassoc' fast-math-flag and add 'trans' fast-math-flag

[Sanjay Patel via Phabricator via llvm-commits]

spatel added a comment.

In https://reviews.llvm.org/D39304#1001295, @mcberg2017 wrote:

> As an llvm vendor for Apple targets we have actually run into the incompatibility issues with old fast and current fast, we elected to use version markers in the IR for in house code to tell us that the old fast is relevant in the bit code reader during auto upgrade for IR into new Fast format.


Thanks for letting me know. Did this manifest as a performance problem only or was there a visible functional difference too?


Repository:
  rL LLVM

https://reviews.llvm.org/D39304