search for: pr28650

...ke a sensible decision, and this is the current state in the top of trunk. However, making i1 legal affected instruction selection of scalar code as well. Currently, there are cases where operations producing or consuming i1's are selected (sub-optimally) to instructions that act on K-regs. PR28650<https://llvm.org/bugs/show_bug.cgi?id=28650> is an example showing that i1's live-in or live-out of basic-blocks are being selected to K register classes, even though we don't want this to happen. This problem does not happen on subtargets without the AVX-512 feature enabled. The foll...