[VectorCombine] Fix invalid shuffle cost argument of foldShuffleOfSelects (#130281) In the previous code (#128032), it specified the destination vector as the getShuffleCost argument. Because the shuffle mask specifies the indices of the two vectors specified as elements, the maximum value is twice the size of the source vector. This causes a problem if the destination vector is smaller than the source vector and specify an index in the mask that exceeds the size of the destination vector. Fix the problem by correcting the previous code, which was using wrong argument in the Cost calculation. Fixes #130250
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.