[all-commits] [llvm/llvm-project] 848cec: Revert "[SLP]Vectorize gathered loads"

[Nikita Popov via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 848cec11f54f1433d19c847fe0296147549ef44a
      https://github.com/llvm/llvm-project/commit/848cec11f54f1433d19c847fe0296147549ef44a
  Author: Nikita Popov <npopov at redhat.com>
  Date:   2024-09-17 (Tue, 17 Sep 2024)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
    M llvm/test/Transforms/SLPVectorizer/AArch64/tsc-s116.ll
    M llvm/test/Transforms/SLPVectorizer/AArch64/vec3-calls.ll
    M llvm/test/Transforms/SLPVectorizer/AArch64/vectorizable-selects-uniform-cmps.ll
    M llvm/test/Transforms/SLPVectorizer/X86/crash_dequeue.ll
    M llvm/test/Transforms/SLPVectorizer/X86/horizontal-minmax.ll
    M llvm/test/Transforms/SLPVectorizer/X86/load-merge-inseltpoison.ll
    M llvm/test/Transforms/SLPVectorizer/X86/load-merge.ll
    M llvm/test/Transforms/SLPVectorizer/X86/lookahead.ll
    M llvm/test/Transforms/SLPVectorizer/X86/pr47629-inseltpoison.ll
    M llvm/test/Transforms/SLPVectorizer/X86/pr47629.ll
    M llvm/test/Transforms/SLPVectorizer/X86/pr48879-sroa.ll
    M llvm/test/Transforms/SLPVectorizer/X86/reorder-possible-strided-node.ll
    M llvm/test/Transforms/SLPVectorizer/X86/scatter-vectorize-reorder.ll
    M llvm/test/Transforms/SLPVectorizer/X86/sin-sqrt.ll
    M llvm/test/Transforms/SLPVectorizer/X86/split-load8_2-unord.ll
    M llvm/test/Transforms/SLPVectorizer/X86/supernode.ll
    M llvm/test/Transforms/SLPVectorizer/X86/vec3-calls.ll
    M llvm/test/Transforms/SLPVectorizer/X86/vec_list_bias-inseltpoison.ll
    M llvm/test/Transforms/SLPVectorizer/X86/vec_list_bias.ll
    M llvm/test/Transforms/SLPVectorizer/X86/vec_list_bias_external_insert_shuffled.ll

  Log Message:
  -----------
  Revert "[SLP]Vectorize gathered loads"

This reverts commit de1f5b96adcea52bf7c9670c46123fe1197050d2.

This has a very large compile-time impact in some cases, in
particular lencod. See:
http://llvm-compile-time-tracker.com/compare.php?from=b1339abb713063363e7804124b8fb3d84143a003&to=de1f5b96adcea52bf7c9670c46123fe1197050d2&stat=instructions:u



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