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Sanjay Patel 49c1e8b6b0 [SLP] delete unused pairwise reduction option 
SLP tries to model 2 forms of vector reductions: pairwise and splitting.
From the cost model code comments, those are defined using an example as:

  /// Pairwise:
  ///  (v0, v1, v2, v3)
  ///  ((v0+v1), (v2+v3), undef, undef)
  /// Split:
  ///  (v0, v1, v2, v3)
  ///  ((v0+v2), (v1+v3), undef, undef)

I don't know the full history of this functionality, but it was partly
added back in D29402. There are apparently no users at this point (no
regression tests change). X86 might have managed to work-around the need
for this through cost model and codegen improvements.

Removing this code makes it easier to continue the work that was started
in D87416 / D88193. The alternative -- if there is some target that is
silently using this option -- is to move this logic into LoopUtils. We
have related/duplicate functionality there via llvm::createTargetReduction().

Differential Revision: https://reviews.llvm.org/D93860
2021-01-05 13:23:07 -05:00
benchmarks
bindings [Go] Fix bindings/go/llvm/IRBindings.cpp 2020-12-16 10:09:58 -08:00
cmake [ASTMatchers] Fix build when no targets are enabled 2021-01-05 14:40:35 +00:00
docs [Coverage] Add support for Branch Coverage in LLVM Source-Based Code Coverage 2021-01-05 09:51:51 -06:00
examples [NFC] Reduce include files dependency and AA header cleanup (part 2). 2020-12-17 14:04:48 +03:00
include GlobalISel: Add isKnownToBeAPowerOfTwo helper function 2021-01-05 12:59:08 -05:00
lib [SLP] delete unused pairwise reduction option 2021-01-05 13:23:07 -05:00
projects llvmbuildectomy - replace llvm-build by plain cmake 2020-11-13 10:35:24 +01:00
resources
runtimes [OpenMP] Fixed the issue that CMake variables for OpenMP were not passed through when building OpenMP with LLVM_ENABLE_RUNTIMES 2020-12-20 18:40:12 -05:00
test [RISCV] Match vmslt(u).vx intrinsics with a small immediate to vmsle(u).vx. 2021-01-05 10:20:21 -08:00
tools [llvm-link] fix linker behavior when linking archives with --only-needed option 2021-01-05 10:02:51 -08:00
unittests GlobalISel: Add isKnownToBeAPowerOfTwo helper function 2021-01-05 12:59:08 -05:00
utils [gn build] Port fec1a442e3b 2021-01-05 15:34:25 +00:00
.clang-format
.clang-tidy
.gitattributes
.gitignore [clangd] Store index in '.cache/clangd/index' instead of '.clangd/index' 2020-07-07 14:53:45 +02:00
CMakeLists.txt Remove Python2 fallback and only advertise Python3 in the doc 2020-12-17 15:40:16 +01:00
CODE_OWNERS.TXT [CODE_OWNERS.TXT] Update to include yours truly as the TableGen owner 2020-11-12 09:49:00 -05:00
configure
CREDITS.TXT [NFC] Add contributors names to CREDITS.TXT 2020-10-07 13:22:55 -04:00
LICENSE.TXT
llvm.spec.in
README.txt Test commit. 2020-03-14 18:08:26 -07:00
RELEASE_TESTERS.TXT

README.txt 

The LLVM Compiler Infrastructure
================================

This directory and its subdirectories contain source code for LLVM,
a toolkit for the construction of highly optimized compilers,
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LLVM is open source software. You may freely distribute it under the terms of
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Please see the documentation provided in docs/ for further
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If you are writing a package for LLVM, see docs/Packaging.rst for our
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