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Chandler Carruth
07f0205ade
indices used by AVX2 and AVX-512 gather instructions. The index vector is hardened by broadcasting the predicate state into a vector register and then or-ing. We don't even have to worry about EFLAGS here. I've added a test for all of the gather intrinsics to make sure that we don't miss one. A particularly interesting creation is the gather prefetch, which needs to be marked as potentially "loading" to get the correct behavior. It's a memory access in many ways, and is actually relevant for SLH. Based on discussion with Craig in review, I've moved it to be `mayLoad` and `mayStore` rather than generic side effects. This matches how we model other prefetch instructions. Many thanks to Craig for the review here. Differential Revision: https://reviews.llvm.org/D49336 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337144 91177308-0d34-0410-b5e6-96231b3b80d8