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llvm / llvm-project / 25b9ed6e4964344e3710359bec4c831e5a8448b9
commit25b9ed6e4964344e3710359bec4c831e5a8448b9[log] [tgz]
authorNikita Popov <npopov@redhat.com>Tue Feb 13 16:41:00 2024 +0100
committerGitHub <noreply@github.com>Tue Feb 13 16:41:00 2024 +0100
tree8f6b5a69ba66cb94cf556333b1d057fd21c2288a
parent89c1bf1230e011f2f0e43554c278205fa1819de5 [diff]
[DAGCombine] Fix multi-use miscompile in load combine (#81586)

The load combine replaces a number of original loads with one new loads
and also replaces the output chains of the original loads with the
output chain of the new load. This is incorrect if the original load is
retained (due to multi-use), as it may get incorrectly reordered.

Fix this by using makeEquivalentMemoryOrdering() instead, which will
create a TokenFactor with both chains.

Fixes https://github.com/llvm/llvm-project/issues/80911.
2 files changed
tree: 8f6b5a69ba66cb94cf556333b1d057fd21c2288a
  1. .ci/
  2. .github/
  3. bolt/
  4. clang/
  5. clang-tools-extra/
  6. cmake/
  7. compiler-rt/
  8. cross-project-tests/
  9. flang/
  10. libc/
  11. libclc/
  12. libcxx/
  13. libcxxabi/
  14. libunwind/
  15. lld/
  16. lldb/
  17. llvm/
  18. llvm-libgcc/
  19. mlir/
  20. openmp/
  21. polly/
  22. pstl/
  23. runtimes/
  24. third-party/
  25. utils/
  26. .arcconfig
  27. .arclint
  28. .clang-format
  29. .clang-tidy
  30. .git-blame-ignore-revs
  31. .gitattributes
  32. .gitignore
  33. .mailmap
  34. CODE_OF_CONDUCT.md
  35. CONTRIBUTING.md
  36. LICENSE.TXT
  37. README.md
  38. SECURITY.md
README.md

The LLVM Compiler Infrastructure

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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.

Getting in touch

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.