df1838f5d9
When -polly-annotate-metadata-vectorize is active, Polly marks its generated loops with llvm.loop.vectorize.enable=true. This is harmful for loops with a loop-carried dependence of distance 1 that involve floating-point operations: the Loop Vectorizer reorders FP operations (e.g. scalar reduction like q = factor*q), producing results that differ from the sequential scalar reference and causing correctness failures. Two changes are made: 1. IslAst.cpp: add PollyVectorizeMetadata to the PerformParallelTest gate so that dependence-distance computation is performed whenever -polly-annotate-metadata-vectorize is passed, not only when -polly-parallel or a vectorizer is active. 2. IslNodeBuilder.cpp / LoopGenerators.cpp: when a loop has a dist=1 dependence involving FP operations, omit the vectorize.enable annotation entirely. This lets the Loop Vectorizer apply its own cost model and legality checks decide. |
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| .ci | ||
| .github | ||
| bolt | ||
| clang | ||
| clang-tools-extra | ||
| cmake | ||
| compiler-rt | ||
| cross-project-tests | ||
| flang | ||
| flang-rt | ||
| libc | ||
| libclc | ||
| libcxx | ||
| libcxxabi | ||
| libsycl | ||
| libunwind | ||
| lld | ||
| lldb | ||
| llvm | ||
| llvm-libgcc | ||
| mlir | ||
| offload | ||
| openmp | ||
| orc-rt | ||
| polly | ||
| runtimes | ||
| third-party | ||
| utils | ||
| .clang-format | ||
| .clang-format-ignore | ||
| .clang-tidy | ||
| .git-blame-ignore-revs | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| CODE_OF_CONDUCT.md | ||
| CONTRIBUTING.md | ||
| LICENSE.TXT | ||
| pyproject.toml | ||
| README.md | ||
| SECURITY.md | ||
The LLVM Compiler Infrastructure
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.
Getting the Source Code and Building LLVM
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.
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