forked from OSchip/llvm-project
95ac3d15e9
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 |
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| llvm.spec.in | ||
README.txt
The LLVM Compiler Infrastructure ================================ This directory and its subdirectories contain source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and runtime environments. LLVM is open source software. You may freely distribute it under the terms of the license agreement found in LICENSE.txt. Please see the documentation provided in docs/ for further assistance with LLVM, and in particular docs/GettingStarted.rst for getting started with LLVM and docs/README.txt for an overview of LLVM's documentation setup. If you are writing a package for LLVM, see docs/Packaging.rst for our suggestions.