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gerrit-public.fairphone.software / toolchain / llvm-project / b4ba3cbda01e710e64948f43cbf9bfdec5ec5855
commitb4ba3cbda01e710e64948f43cbf9bfdec5ec5855[log] [tgz]
authorSimon Pilgrim <llvm-dev@redking.me.uk>Sun Oct 06 21:11:45 2019 +0000
committerSimon Pilgrim <llvm-dev@redking.me.uk>Sun Oct 06 21:11:45 2019 +0000
tree7f12d5d11011e085eb15e5125e1c13a624f0e520
parentd84cd7caa87e8486a131c76f45595535678c6552 [diff]
[X86][AVX] Access a scalar float/double as a free extract from a broadcast load (PR43217)

If a fp scalar is loaded and then used as both a scalar and a vector broadcast, perform the load as a broadcast and then extract the scalar for 'free' from the 0th element.

This involved switching the order of the X86ISD::BROADCAST combines so we only convert to X86ISD::BROADCAST_LOAD once all other canonicalizations have been attempted.

Adds a DAGCombinerInfo::recursivelyDeleteUnusedNodes wrapper.

Fixes PR43217

Differential Revision: https://reviews.llvm.org/D68544

llvm-svn: 373871
4 files changed
tree: 7f12d5d11011e085eb15e5125e1c13a624f0e520
  1. clang/
  2. clang-tools-extra/
  3. compiler-rt/
  4. debuginfo-tests/
  5. libc/
  6. libclc/
  7. libcxx/
  8. libcxxabi/
  9. libunwind/
  10. lld/
  11. lldb/
  12. llgo/
  13. llvm/
  14. openmp/
  15. parallel-libs/
  16. polly/
  17. pstl/
  18. .arcconfig
  19. .clang-format
  20. .clang-tidy
  21. .git-blame-ignore-revs
  22. .gitignore
  23. README.md
README.md

The LLVM Compiler Infrastructure

This directory and its subdirectories contain source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and runtime environments.