[PATCH] D132837: [ISel] Enable generating more fma instructions.

[Sanjay Patel via Phabricator via llvm-commits]

spatel added a comment.

Note that there's a gray area for fast-math-flags with transforms like this: we generally just check FMF on the final value in the sequence to determine if the fold is allowed. 
I haven't seen many examples of mixed FMF in practice, but front-ends are becoming more flexible about that via pragma or other decorations, so I added a couple of AArch64 tests to demonstrate current behavior:
ddd27a3d3934 <https://reviews.llvm.org/rGddd27a3d39344ce1f13316227eb176c7672a583c>

If this patch is reverted for some reason, those tests will need to be updated.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D132837/new/

https://reviews.llvm.org/D132837