[llvm] [LV] Add vplan folds for (X - (X & Y)) -> (X & ~Y) (PR #226466)
via llvm-commits
llvm-commits at lists.llvm.org
Fri Sep 25 05:14:59 PDT 2026
llvmorg-github-actions[bot] wrote:
<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-backend-risc-v
Author: David Sherwood (david-arm)
<details>
<summary>Changes</summary>
Now that the recipe simplification is more like instcombine, I decided to upload a patch I've had lying around for a while in case reviewers think it's worthwhile.
This simplifies the calculation of the number of iterations processed in the vector loop, using a recipe combine borrowed from instcombine for equivalent IR. Unfortunately it's a very invasive PR, since it changes over 350 tests!
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Full diff: https://github.com/llvm/llvm-project/pull/226466.diff
360 Files Affected:
- (modified) llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp (+9)
- (modified) llvm/test/Transforms/LoopLoadElim/versioning-scev-invalidation.ll (+1-2)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/aggressive-interleaving.ll (+3-6)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/bounded-load.ll (+15-22)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/call-costs.ll (+1-2)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/clmul.ll (+1-2)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/conditional-branches-cost.ll (+3-6)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/conditional-scalar-assignment.ll (+3-6)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/deterministic-type-shrinkage.ll (+3-4)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/epilog-iv-live-outs.ll (+18-22)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/epilog-iv-select-cmp.ll (+12-14)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/epilog-vectorization-factors.ll (+9-12)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/epilog-vectorization-widen-inductions.ll (+12-16)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/epilogue-vectorization-fix-scalar-resume-values.ll (+8-10)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/f128-fmuladd-reduction.ll (+1-2)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/find-last-iv-sinkable-expr-epilogue.ll (+6-8)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/fixed-order-recurrence.ll (+2-4)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/fmax-without-fast-math-flags.ll (+2-4)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/fmin-without-fast-math-flags.ll (+1-2)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/force-target-instruction-cost.ll (+8-12)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/gather-cost.ll (+9-10)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/gather-do-not-vectorize-addressing.ll (+1-2)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/induction-costs-sve.ll (+7-14)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/induction-costs.ll (+21-28)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/indvar-overflow-check-scalable-tc.ll (+3-6)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/interleave-with-gaps.ll (+13-20)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/interleaving-load-store.ll (+9-12)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/interleaving-reduction.ll (+6-8)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/intrinsiccost.ll (+6-12)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/load-cast-context.ll (+3-4)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/loop-vectorization-factors.ll (+19-28)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/low_trip_count_predicates.ll (+6-8)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/masked-call-scalarize.ll (+1-2)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/masked-call.ll (+1-2)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/optsize_minsize.ll (+1-2)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-chained.ll (+12-24)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-constant-ops.ll (+7-14)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-dot-product-epilogue.ll (+4-6)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-dot-product-neon.ll (+18-36)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-dot-product.ll (+10-20)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-extends-shared-with-reduce.ll (+1-2)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-fdot-product.ll (+1-2)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-incomplete-chains.ll (+1-2)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-interleave.ll (+2-4)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-no-dotprod.ll (+1-2)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-with-predicate-epilogue.ll (+6-8)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce.ll (+3-6)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/predicated-costs.ll (+1-2)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/reduction-cost.ll (+1-2)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/reduction-recurrence-costs-sve.ll (+8-12)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/reduction-small-size.ll (+7-10)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/replicating-load-store-costs-apple.ll (+1-2)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/replicating-load-store-costs.ll (+1-2)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/scalable-fp-ext-trunc-illegal-type.ll (+1-2)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/select-index.ll (+17-26)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/simple_early_exit.ll (+1-2)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/streaming-compatible-sve-no-maximize-bandwidth.ll (+2-4)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/sve-epilog-vect-inloop-reductions.ll (+1-2)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/sve-epilog-vect-reductions.ll (+1-2)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/sve-epilog-vect-strict-reductions.ll (+1-2)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/sve-epilog-vect.ll (+3-6)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/sve-epilog-vscale-fixed.ll (+2-4)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/sve-fixed-width-inorder-core.ll (+3-6)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/sve-non-native-interleaved-accesses.ll (+1-2)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/sve-tail-folding-option.ll (+2-4)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/sve2-histcnt-epilogue.ll (+1-2)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/transform-narrow-interleave-fold-tail.ll (+1-2)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/transform-narrow-interleave-to-widen-memory-cost.ll (+9-12)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/transform-narrow-interleave-to-widen-memory-derived-ivs.ll (+4-8)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/vector-reverse-mask4.ll (+2-3)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/vector-reverse.ll (+3-6)
- (modified) llvm/test/Transforms/LoopVectorize/ARM/active-lane-mask.ll (+1-2)
- (modified) llvm/test/Transforms/LoopVectorize/ARM/gather-cost.ll (+1-2)
- (modified) llvm/test/Transforms/LoopVectorize/ARM/mve-gather-scatter-tailpred.ll (+7-14)
- (modified) llvm/test/Transforms/LoopVectorize/ARM/mve-hoist-runtime-checks.ll (+1-2)
- (modified) llvm/test/Transforms/LoopVectorize/ARM/mve-qabs.ll (+9-12)
- (modified) llvm/test/Transforms/LoopVectorize/ARM/mve-reduction-types.ll (+13-26)
- (modified) llvm/test/Transforms/LoopVectorize/ARM/mve-reductions-interleave.ll (+2-4)
- (modified) llvm/test/Transforms/LoopVectorize/ARM/mve-reductions.ll (+27-54)
- (modified) llvm/test/Transforms/LoopVectorize/ARM/mve-reg-pressure-vmla.ll (+1-2)
- (modified) llvm/test/Transforms/LoopVectorize/ARM/mve-saddsatcost.ll (+1-2)
- (modified) llvm/test/Transforms/LoopVectorize/ARM/mve-selectandorcost.ll (+3-4)
- (modified) llvm/test/Transforms/LoopVectorize/ARM/optsize_minsize.ll (+1-2)
- (modified) llvm/test/Transforms/LoopVectorize/ARM/sphinx.ll (+1-2)
- (modified) llvm/test/Transforms/LoopVectorize/ARM/tail-fold-multiple-icmps.ll (+1-2)
- (modified) llvm/test/Transforms/LoopVectorize/ARM/tail-folding-counting-down.ll (+14-28)
- (modified) llvm/test/Transforms/LoopVectorize/ARM/tail-folding-not-allowed.ll (+5-10)
- (modified) llvm/test/Transforms/LoopVectorize/ARM/tail-folding-scalar-epilogue-fallback.ll (+43-33)
- (modified) llvm/test/Transforms/LoopVectorize/PowerPC/exit-branch-cost.ll (+7-8)
- (modified) llvm/test/Transforms/LoopVectorize/PowerPC/large-loop-rdx.ll (+5-6)
- (modified) llvm/test/Transforms/LoopVectorize/PowerPC/optimal-epilog-vectorization.ll (+12-16)
- (modified) llvm/test/Transforms/LoopVectorize/PowerPC/partial-red.ll (+75-90)
- (modified) llvm/test/Transforms/LoopVectorize/PowerPC/pr41179.ll (+1-2)
- (modified) llvm/test/Transforms/LoopVectorize/PowerPC/small-loop-rdx.ll (+5-6)
- (modified) llvm/test/Transforms/LoopVectorize/PowerPC/vectorize-bswap.ll (+1-2)
- (modified) llvm/test/Transforms/LoopVectorize/RISCV/bf16.ll (+1-2)
- (modified) llvm/test/Transforms/LoopVectorize/RISCV/illegal-type.ll (+1-2)
- (modified) llvm/test/Transforms/LoopVectorize/RISCV/interleaved-store-with-gap.ll (+1-2)
- (modified) llvm/test/Transforms/LoopVectorize/RISCV/ordered-reduction.ll (+2-4)
- (modified) llvm/test/Transforms/LoopVectorize/RISCV/partial-reduce-with-predicate.ll (+6-12)
- (modified) llvm/test/Transforms/LoopVectorize/RISCV/reductions.ll (+6-12)
- (modified) llvm/test/Transforms/LoopVectorize/RISCV/riscv-unroll.ll (+2-4)
- (modified) llvm/test/Transforms/LoopVectorize/RISCV/tail-folding-inloop-reduction.ll (+8-16)
- (modified) llvm/test/Transforms/LoopVectorize/RISCV/tail-folding-reduction.ll (+8-16)
- (modified) llvm/test/Transforms/LoopVectorize/SystemZ/vectorized-epilogue-loop.ll (+3-4)
- (modified) llvm/test/Transforms/LoopVectorize/VPlan/cse-loads-tailfold.ll (+2-3)
- (modified) llvm/test/Transforms/LoopVectorize/VPlan/epilogue-vectorization-printing.ll (+43-47)
- (modified) llvm/test/Transforms/LoopVectorize/VPlan/interleave-conditional-scalar-assignment-vplan.ll (+6-8)
- (modified) llvm/test/Transforms/LoopVectorize/VPlan/memory-checks.ll (+4-8)
- (modified) llvm/test/Transforms/LoopVectorize/VPlan/vplan-predicate-switch.ll (+4-5)
- (modified) llvm/test/Transforms/LoopVectorize/VPlan/widen-canonical-iv-register-pressure.ll (+4-6)
- (modified) llvm/test/Transforms/LoopVectorize/WebAssembly/induction-branch-cost.ll (+1-2)
- (modified) llvm/test/Transforms/LoopVectorize/WebAssembly/partial-reduce-accumulate.ll (+2-4)
- (modified) llvm/test/Transforms/LoopVectorize/X86/cast-costs.ll (+5-6)
- (modified) llvm/test/Transforms/LoopVectorize/X86/clmul.ll (+1-2)
- (modified) llvm/test/Transforms/LoopVectorize/X86/conditional-scalar-assignment.ll (+12-24)
- (modified) llvm/test/Transforms/LoopVectorize/X86/conversion-cost.ll (+22-24)
- (modified) llvm/test/Transforms/LoopVectorize/X86/cost-conditional-branches.ll (+1-2)
- (modified) llvm/test/Transforms/LoopVectorize/X86/cost-model-i386.ll (+3-4)
- (modified) llvm/test/Transforms/LoopVectorize/X86/cost-model.ll (+7-10)
- (modified) llvm/test/Transforms/LoopVectorize/X86/divs-with-tail-folding.ll (+3-6)
- (modified) llvm/test/Transforms/LoopVectorize/X86/end-pointer-signed.ll (+1-2)
- (modified) llvm/test/Transforms/LoopVectorize/X86/epilog-vectorization-inductions.ll (+6-8)
- (modified) llvm/test/Transforms/LoopVectorize/X86/epilog-vectorization-ordered-reduction.ll (+22-26)
- (modified) llvm/test/Transforms/LoopVectorize/X86/fixed-order-recurrence.ll (+2-4)
- (modified) llvm/test/Transforms/LoopVectorize/X86/float-induction-x86.ll (+21-24)
- (modified) llvm/test/Transforms/LoopVectorize/X86/fold-tail-low-trip-count.ll (+2-4)
- (modified) llvm/test/Transforms/LoopVectorize/X86/gather-cost.ll (+1-2)
- (modified) llvm/test/Transforms/LoopVectorize/X86/gather_scatter.ll (+4-6)
- (modified) llvm/test/Transforms/LoopVectorize/X86/idiv-by-const.ll (+24-36)
- (modified) llvm/test/Transforms/LoopVectorize/X86/illegal-parallel-loop-uniform-write.ll (+1-2)
- (modified) llvm/test/Transforms/LoopVectorize/X86/induction-costs.ll (+19-21)
- (modified) llvm/test/Transforms/LoopVectorize/X86/induction-step.ll (+3-6)
- (modified) llvm/test/Transforms/LoopVectorize/X86/interleave-opaque-pointers.ll (+1-2)
- (modified) llvm/test/Transforms/LoopVectorize/X86/intrinsiccost.ll (+96-100)
- (modified) llvm/test/Transforms/LoopVectorize/X86/invariant-load-gather.ll (+3-4)
- (modified) llvm/test/Transforms/LoopVectorize/X86/invariant-store-vectorization.ll (+13-16)
- (modified) llvm/test/Transforms/LoopVectorize/X86/iv-live-outs.ll (+3-4)
- (modified) llvm/test/Transforms/LoopVectorize/X86/load-deref-pred.ll (+2-4)
- (modified) llvm/test/Transforms/LoopVectorize/X86/masked_load_store.ll (+18-24)
- (modified) llvm/test/Transforms/LoopVectorize/X86/optsize.ll (+2-4)
- (modified) llvm/test/Transforms/LoopVectorize/X86/outer-loop-non-power-of-2-type.ll (+1-2)
- (modified) llvm/test/Transforms/LoopVectorize/X86/pr23997.ll (+5-6)
- (modified) llvm/test/Transforms/LoopVectorize/X86/pr35432.ll (+1-2)
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- (modified) llvm/test/Transforms/LoopVectorize/X86/pr47437.ll (+6-10)
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- (modified) llvm/test/Transforms/LoopVectorize/X86/predicate-switch.ll (+12-24)
- (modified) llvm/test/Transforms/LoopVectorize/X86/predicated-instruction-cost.ll (+1-2)
- (modified) llvm/test/Transforms/LoopVectorize/X86/predicated-replicate-feeding-cast.ll (+2-4)
- (modified) llvm/test/Transforms/LoopVectorize/X86/reduction-crash.ll (+1-2)
- (modified) llvm/test/Transforms/LoopVectorize/X86/reduction-fastmath.ll (+2-4)
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- (modified) llvm/test/Transforms/LoopVectorize/fpsat.ll (+2-4)
- (modified) llvm/test/Transforms/LoopVectorize/hoist-and-sink-mem-ops-with-invariant-pointers.ll (+4-8)
- (modified) llvm/test/Transforms/LoopVectorize/hoist-predicated-loads-with-predicated-stores.ll (+1-2)
- (modified) llvm/test/Transforms/LoopVectorize/if-conversion-nest.ll (+2-4)
- (modified) llvm/test/Transforms/LoopVectorize/if-conversion.ll (+3-6)
- (modified) llvm/test/Transforms/LoopVectorize/if-pred-non-void.ll (+2-4)
- (modified) llvm/test/Transforms/LoopVectorize/if-pred-stores.ll (+3-6)
- (modified) llvm/test/Transforms/LoopVectorize/if-reduction.ll (+15-30)
- (modified) llvm/test/Transforms/LoopVectorize/induction-ptrcasts.ll (+2-4)
- (modified) llvm/test/Transforms/LoopVectorize/induction-step.ll (+8-14)
- (modified) llvm/test/Transforms/LoopVectorize/induction-unroll-novec.ll (+3-4)
- (modified) llvm/test/Transforms/LoopVectorize/induction-wrapflags.ll (+4-8)
- (modified) llvm/test/Transforms/LoopVectorize/induction.ll (+77-154)
``````````diff
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</details>
https://github.com/llvm/llvm-project/pull/226466
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