[all-commits] [llvm/llvm-project] c6e38b: Reapply "[LV] Improve AnyOf reduction codegen. (#7...

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: c6e38b928c56f562aea68a8e90f02dbdf0eada85
      https://github.com/llvm/llvm-project/commit/c6e38b928c56f562aea68a8e90f02dbdf0eada85
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2024-04-05 (Fri, 05 Apr 2024)

  Changed paths:
    M llvm/include/llvm/Transforms/Utils/LoopUtils.h
    M llvm/lib/Transforms/Utils/LoopUtils.cpp
    M llvm/lib/Transforms/Vectorize/LoopVectorizationPlanner.h
    M llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
    M llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp
    M llvm/test/Transforms/LoopVectorize/AArch64/sve-select-cmp.ll
    M llvm/test/Transforms/LoopVectorize/RISCV/select-cmp-reduction.ll
    M llvm/test/Transforms/LoopVectorize/epilog-vectorization-any-of-reductions.ll
    M llvm/test/Transforms/LoopVectorize/select-cmp-predicated.ll
    M llvm/test/Transforms/LoopVectorize/select-cmp.ll
    M llvm/test/Transforms/LoopVectorize/select-reduction-start-value-may-be-undef-or-poison.ll

  Log Message:
  -----------
  Reapply "[LV] Improve AnyOf reduction codegen. (#78304)"

This reverts the revert commit 589c7abb03448.

This patch includes a fix for any-of reductions and epilogue
vectorization. Extra test coverage for the issue that caused the revert
has been added in 399ff08e29d.

--------------------------------
Original commit message:

Update AnyOf reduction code generation to only keep track of the AnyOf
property in a boolean vector in the loop, only selecting either the new
or start value in the middle block.

The patch incorporates feedback from https://reviews.llvm.org/D153697.

This fixes the #62565, as now there aren't multiple uses of the
start/new values.

Fixes https://github.com/llvm/llvm-project/issues/62565

PR: https://github.com/llvm/llvm-project/pull/78304



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