Amara Emerson 95ac3d15e9 [AArch64][GlobalISel] Add G_VECREDUCE fewerElements support for full scalarization. ... For some reductions like G_VECREDUCE_OR on AArch64, we need to scalarize completely if the source is <= 64b. This change adds support for that in the legalizer. If the source has a pow-2 num elements, then we can do a tree reduction using the scalar operation in the individual elements. Otherwise, we just create a sequential chain of operations. For AArch64, we only need to scalarize if the input is <64b. If it's great than 64b then we can first do a fewElements step to 64b, taking advantage of vector instructions until we reach the point of scalarization. I also had to relax the verifier checks for reductions because the intrinsics support <1 x EltTy> types, which we lower to scalars for GlobalISel. Differential Revision: https://reviews.llvm.org/D108276		2021-08-19 16:38:52 -07:00
..
llvm	[AArch64][GlobalISel] Add G_VECREDUCE fewerElements support for full scalarization.	2021-08-19 16:38:52 -07:00
llvm-c	[LTO][Legacy] Add new API to check presence of ctor/dtor functions.	2021-07-28 12:41:56 +00:00