[all-commits] [llvm/llvm-project] fe0429: [AArch64] Change the default vscale-for-tuning to ...

[David Green via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: fe042904829b83a61c1f4bc904f8f9e5b6da891e
      https://github.com/llvm/llvm-project/commit/fe042904829b83a61c1f4bc904f8f9e5b6da891e
  Author: David Green <david.green at arm.com>
  Date:   2024-11-29 (Fri, 29 Nov 2024)

  Changed paths:
    M llvm/lib/Target/AArch64/AArch64Subtarget.h
    M llvm/test/Analysis/CostModel/AArch64/sve-gather.ll
    M llvm/test/Analysis/CostModel/AArch64/sve-intrinsics.ll
    M llvm/test/Analysis/CostModel/AArch64/sve-scatter.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/clamped-trip-count.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/conditional-branches-cost.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/induction-costs-sve.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/low_trip_count_predicates.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/reduction-recurrence-costs-sve.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/scalable-vectorization-cost-tuning.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/scalable-vf-hint.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/store-costs-sve.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/sve-strict-fadd-cost.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/type-shrinkage-zext-costs.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/veclib-function-calls.ll

  Log Message:
  -----------
  [AArch64] Change the default vscale-for-tuning to 1. (#117174)

Most AArch64 cpus outside of Neoverse V1 (256) and A64FX (512) have an
SVE vector length of 128, and in environments like Android (where no
mcpu option is common) we would expect all cpus to match. This patch
changes the default vector length to 128 with -mcpu=generic, to match
the most common case.



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