[PATCH] D39976: [AArch64] Query the target when folding loads and stores

[Evandro Menezes via Phabricator via llvm-commits]

evandro added a comment.

In https://reviews.llvm.org/D39976#1017321, @gberry wrote:

> Would it not be simpler to just add a subtarget bool that controls whether the problematic opcodes are emitted and set it for your subtargets (similar to the way STRQroIsSlow is handled)?  That way you could avoid generating them not just in this pass, but in ISel and frame lowering?


Methinks that the gist is to move away from features and to rely more on the cost model.  In the case of this patch, it also removes the feature `FeatureSlowPaired128` in https://reviews.llvm.org/D40107.


https://reviews.llvm.org/D39976