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fuchsia / third_party / llvm-project / 17586cda4adda536af2631ff83dcb49d2dceaa2f
commit17586cda4adda536af2631ff83dcb49d2dceaa2f[log] [tgz]
authorSimon Pilgrim <llvm-dev@redking.me.uk>Fri Apr 05 14:56:21 2019 +0000
committerSimon Pilgrim <llvm-dev@redking.me.uk>Fri Apr 05 14:56:21 2019 +0000
tree691202d0aef81a6dd78eaaefa5faf1cb6afc57cb
parent84f2271acd818e50c598fef7ce9586e7ee0ac553 [diff]
[SelectionDAG] Add fcmp UNDEF handling to SelectionDAG::FoldSetCC

Second half of PR40800, this patch adds DAG undef handling to fcmp instructions to match the behavior in llvm::ConstantFoldCompareInstruction, this permits constant folding of vector comparisons where some elements had been reduced to UNDEF (by SimplifyDemandedVectorElts etc.).

This involves a lot of tweaking to reduced tests as bugpoint loves to reduce fcmp arguments to undef........

Differential Revision: https://reviews.llvm.org/D60006

llvm-svn: 357765
8 files changed
tree: 691202d0aef81a6dd78eaaefa5faf1cb6afc57cb
  1. clang/
  2. clang-tools-extra/
  3. compiler-rt/
  4. debuginfo-tests/
  5. libclc/
  6. libcxx/
  7. libcxxabi/
  8. libunwind/
  9. lld/
  10. lldb/
  11. llgo/
  12. llvm/
  13. openmp/
  14. parallel-libs/
  15. polly/
  16. pstl/
  17. .arcconfig
  18. .clang-format
  19. .clang-tidy
  20. 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.