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llvm / llvm-project / 815644b4dd882ade2e5649d4f97c3dd6f7aea200
commit815644b4dd882ade2e5649d4f97c3dd6f7aea200[log] [tgz]
authorLuke Lau <luke@igalia.com>Thu Feb 22 11:50:27 2024 +0800
committerGitHub <noreply@github.com>Thu Feb 22 11:50:27 2024 +0800
treed88fea78ee7c40b156ae63135d2462d7983e66e4
parent05af9c83f3a0d154f73d619ac1361eae05531e5e [diff]
[RISCV] Fix mgather -> riscv.masked.strided.load combine not extending indices (#82506)

This fixes the miscompile reported in #82430 by telling
isSimpleVIDSequence to sign extend to XLen instead of the width of the
indices, since the "sequence" of indices generated by a strided load
will be at XLen.

This was the simplest way I could think of getting isSimpleVIDSequence
to treat the indexes as if they were zero extended to XLenVT.

Another way we could do this is by refactoring out the "get constant
integers" part from isSimpleVIDSequence and handle them as APInts so we
can separately zero extend it.

Fixes #82430
2 files changed
tree: d88fea78ee7c40b156ae63135d2462d7983e66e4
  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.

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Other components include: the libc++ C++ standard library, the LLD linker, and more.

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