[all-commits] [llvm/llvm-project] ff4e22: Revert "[VPlan] Extract reverse mask from reverse ...

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ff4e229f8c758bc547d8bb42dbd9209306603f94
      https://github.com/llvm/llvm-project/commit/ff4e229f8c758bc547d8bb42dbd9209306603f94
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2026-03-31 (Tue, 31 Mar 2026)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
    M llvm/lib/Transforms/Vectorize/VPlan.h
    M llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp
    M llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
    M llvm/test/Transforms/LoopVectorize/AArch64/sve-vector-reverse-mask4.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/vector-reverse-mask4.ll
    M llvm/test/Transforms/LoopVectorize/RISCV/dbg-tail-folding-by-evl.ll
    M llvm/test/Transforms/LoopVectorize/RISCV/predicated-reverse-store.ll
    M llvm/test/Transforms/LoopVectorize/RISCV/riscv-vector-reverse.ll
    M llvm/test/Transforms/LoopVectorize/RISCV/tail-folding-reverse-load-store.ll
    M llvm/test/Transforms/LoopVectorize/RISCV/tail-folding-uniform-store.ll
    M llvm/test/Transforms/LoopVectorize/VPlan/RISCV/vplan-riscv-vector-reverse.ll
    M llvm/test/Transforms/LoopVectorize/X86/masked_load_store.ll
    M llvm/unittests/Transforms/Vectorize/VPlanTest.cpp

  Log Message:
  -----------
  Revert "[VPlan] Extract reverse mask from reverse accesses" (#189637)

Reverts llvm/llvm-project#155579

Assertion added triggers on some buildbots
clang:
/home/tcwg-buildbot/worker/clang-aarch64-sve2-vla/llvm/llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp:3840:
virtual InstructionCost
llvm::VPWidenMemoryRecipe::computeCost(ElementCount, VPCostContext &)
const: Assertion `!IsReverse() && "Inconsecutive memory access should
not have reverse order"' failed.
PLEASE submit a bug report to
https://github.com/llvm/llvm-project/issues/ and include the crash
backtrace, preprocessed source, and associated run script.
Stack dump:
0. Program arguments:
/home/tcwg-buildbot/worker/clang-aarch64-sve2-vla/stage1.install/bin/clang
-DNDEBUG -mcpu=neoverse-v2 -mllvm -scalable-vectorization=preferred -O3
-std=gnu17 -fcommon -Wno-error=incompatible-pointer-types -MD -MT
MultiSource/Benchmarks/Prolangs-C/TimberWolfMC/CMakeFiles/timberwolfmc.dir/finalpin.c.o
-MF CMakeFiles/timberwolfmc.dir/finalpin.c.o.d -o
CMakeFiles/timberwolfmc.dir/finalpin.c.o -c
/home/tcwg-buildbot/worker/clang-aarch64-sve2-vla/test/test-suite/MultiSource/Benchmarks/Prolangs-C/TimberWolfMC/finalpin.c



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