[VPlan] Run narrowInterleaveGroups during general VPlan optimizations. (#149706) Move narrowInterleaveGroups to to general VPlan optimization stage. To do so, narrowInterleaveGroups now has to find a suitable VF where all interleave groups are consecutive and saturate the full vector width. If such a VF is found, the original VPlan is split into 2: a) a new clone which contains all VFs of Plan, except VFToOptimize, and b) the original Plan with VFToOptimize as single VF. The original Plan is then optimized. If a new copy for the other VFs has been created, it is returned and the caller has to add it to the list of candidate plans. Together with https://github.com/llvm/llvm-project/pull/149702, this allows to take the narrowed interleave groups into account when computing costs to choose the best VF and interleave count. One example where we currently miss interleaving/unrolling when narrowing interleave groups is https://godbolt.org/z/Yz77zbacz PR: https://github.com/llvm/llvm-project/pull/149706
Welcome to the LLVM project!
This repository contains the source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and run-time environments.
The LLVM project has multiple components. The core of the project is itself called “LLVM”. This contains all of the tools, libraries, and header files needed to process intermediate representations and convert them into object files. Tools include an assembler, disassembler, bitcode analyzer, and bitcode optimizer.
C-like languages use the Clang frontend. This component compiles C, C++, Objective-C, and Objective-C++ code into LLVM bitcode -- and from there into object files, using LLVM.
Other components include: the libc++ C++ standard library, the LLD linker, and more.
Consult the Getting Started with LLVM page for information on building and running LLVM.
For information on how to contribute to the LLVM project, please take a look at the Contributing to LLVM guide.
Join the LLVM Discourse forums, Discord chat, LLVM Office Hours or Regular sync-ups.
The LLVM project has adopted a code of conduct for participants to all modes of communication within the project.