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llvm / llvm-project / 079c968eb95aa2c84444d0e5d5564d575b93c909
commit079c968eb95aa2c84444d0e5d5564d575b93c909[log] [tgz]
authorPhilip Reames <preames@rivosinc.com>Wed Aug 30 12:17:40 2023 -0700
committerPhilip Reames <listmail@philipreames.com>Wed Aug 30 12:44:36 2023 -0700
tree40082f3a730c966e76af85d97c06942d9b1c35db
parent07bd5f20bcd36d3a906820b27fde41f7cf0420ef [diff]
[RISCV] Form vmv.s.f/x from single element splats via DAG combine

This re-implements the special casing we had in lowerScalarSplat as a DAG combine. As can be seen in the tests, this ends up triggering in a bunch more cases.

The semantically interesting bit of this change is the use of the implicit truncate semantics for when XLEN > SEW. We'd already been doing this for vmv.v.x, but this change extends e.g. the constant matching to make the same assumption about vmv.s.x. Per my reading of the specification, this should be fine, and if anything, is more obviously true of vmv.s.x than vmv.v.x.

Differential Revision: https://reviews.llvm.org/D158874
34 files changed
tree: 40082f3a730c966e76af85d97c06942d9b1c35db
  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. .gitignore
  32. .mailmap
  33. CONTRIBUTING.md
  34. LICENSE.TXT
  35. README.md
  36. SECURITY.md
README.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.

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

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For information on how to contribute to the LLVM project, please take a look at the Contributing to LLVM guide.

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