[all-commits] [llvm/llvm-project] cb71fe: [VPlan] Expand SCEV min/max via scalar intrinsic V...

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: cb71fefb2258fdd00747043a9c322f95d684b000
      https://github.com/llvm/llvm-project/commit/cb71fefb2258fdd00747043a9c322f95d684b000
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2026-07-13 (Mon, 13 Jul 2026)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/VPlanUtils.cpp
    M llvm/test/Transforms/LoopVectorize/AArch64/conditional-branches-cost.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/divs-with-scalable-vfs.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/fold-tail-low-trip-count.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-no-dotprod.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/sve-multiexit.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/sve-runtime-check-size-based-threshold.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/sve2-histcnt-too-many-deps.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/sve2-histcnt.ll
    M llvm/test/Transforms/LoopVectorize/ARM/tail-folding-counting-down.ll
    M llvm/test/Transforms/LoopVectorize/RISCV/conditional-scalar-assignment.ll
    M llvm/test/Transforms/LoopVectorize/RISCV/dbg-tail-folding-by-evl.ll
    M llvm/test/Transforms/LoopVectorize/RISCV/dead-ops-cost.ll
    M llvm/test/Transforms/LoopVectorize/RISCV/early-exit-live-out.ll
    M llvm/test/Transforms/LoopVectorize/RISCV/fminimumnum.ll
    M llvm/test/Transforms/LoopVectorize/RISCV/inloop-reduction.ll
    M llvm/test/Transforms/LoopVectorize/RISCV/interleaved-masked-access.ll
    M llvm/test/Transforms/LoopVectorize/RISCV/iv-select-cmp.ll
    M llvm/test/Transforms/LoopVectorize/RISCV/partial-reduce-dot-product.ll
    M llvm/test/Transforms/LoopVectorize/RISCV/strided-accesses.ll
    M llvm/test/Transforms/LoopVectorize/RISCV/tail-folding-bin-unary-ops-args.ll
    M llvm/test/Transforms/LoopVectorize/RISCV/tail-folding-call-intrinsics.ll
    M llvm/test/Transforms/LoopVectorize/RISCV/tail-folding-cast-intrinsics.ll
    M llvm/test/Transforms/LoopVectorize/RISCV/tail-folding-complex-mask.ll
    M llvm/test/Transforms/LoopVectorize/RISCV/tail-folding-div.ll
    M llvm/test/Transforms/LoopVectorize/RISCV/tail-folding-interleave.ll
    M llvm/test/Transforms/LoopVectorize/RISCV/tail-folding-iv32.ll
    M llvm/test/Transforms/LoopVectorize/RISCV/tail-folding-masked-loadstore.ll
    M llvm/test/Transforms/LoopVectorize/RISCV/tail-folding-reverse-load-store.ll
    M llvm/test/Transforms/LoopVectorize/RISCV/tail-folding-safe-dep-distance.ll
    M llvm/test/Transforms/LoopVectorize/RISCV/transform-narrow-interleave-to-widen-memory.ll
    M llvm/test/Transforms/LoopVectorize/RISCV/vectorize-vp-intrinsics.ll
    M llvm/test/Transforms/LoopVectorize/VPlan/expand-scev.ll
    M llvm/test/Transforms/LoopVectorize/X86/pr35432.ll
    M llvm/test/Transforms/LoopVectorize/X86/replicating-load-store-costs.ll
    M llvm/test/Transforms/LoopVectorize/cast-induction.ll
    M llvm/test/Transforms/LoopVectorize/find-last-iv-sinkable-expr-tail-folding.ll
    M llvm/test/Transforms/LoopVectorize/find-last-iv-sinkable-expr.ll
    M llvm/test/Transforms/LoopVectorize/find-last.ll
    M llvm/test/Transforms/LoopVectorize/first-order-recurrence.ll
    M llvm/test/Transforms/LoopVectorize/induction-ptrcasts.ll
    M llvm/test/Transforms/LoopVectorize/invalidate-scev-at-scope-after-vectorization.ll
    M llvm/test/Transforms/LoopVectorize/invariant-store-vectorization.ll
    M llvm/test/Transforms/LoopVectorize/iv-select-cmp-decreasing.ll
    M llvm/test/Transforms/LoopVectorize/iv-select-cmp-fold-tail.ll
    M llvm/test/Transforms/LoopVectorize/iv_outside_user.ll
    M llvm/test/Transforms/LoopVectorize/load-deref-pred-align.ll
    M llvm/test/Transforms/LoopVectorize/nested-loops-scev-expansion.ll
    M llvm/test/Transforms/LoopVectorize/pr125278.ll
    M llvm/test/Transforms/LoopVectorize/pr37248.ll
    M llvm/test/Transforms/LoopVectorize/pr38697.ll
    M llvm/test/Transforms/LoopVectorize/reduction-small-size.ll
    M llvm/test/Transforms/LoopVectorize/replace-first-order-recurrence-by-versioned-iv.ll
    M llvm/test/Transforms/LoopVectorize/reuse-lcssa-phi-scev-expansion.ll
    M llvm/test/Transforms/LoopVectorize/scev-exit-phi-invalidation.ll
    M llvm/test/Transforms/LoopVectorize/scev-predicate-reasoning.ll
    M llvm/test/Transforms/LoopVectorize/trip-count-expansion-may-introduce-ub.ll
    M llvm/test/Transforms/LoopVectorize/vplan-native-path-inner-loop-with-runtime-checks.ll
    M llvm/test/Transforms/PhaseOrdering/AArch64/indvars-vectorization.ll

  Log Message:
  -----------
  [VPlan] Expand SCEV min/max via scalar intrinsic VPInstructions. (#207842)

Use the VPInstruction::Intrinsic opcode to expand min/max SCEV
expressions to LLVM min/max intrinsics as VPInstructions.

The operands are chained in reverse order, matching SCEVExpander's
expansion of min/max expressions.

This helps to clean up another set of duplicated vscale calls.

Depends on https://github.com/llvm/llvm-project/pull/207541
Depends on https://github.com/llvm/llvm-project/pull/207836

PR: https://github.com/llvm/llvm-project/pull/207842



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