[all-commits] [llvm/llvm-project] 425d1a: [RISCV] Handle scalarized reductions in getArithme...

[Luke Lau via All-commits]

  Branch: refs/heads/release/20.x
  Home:   https://github.com/llvm/llvm-project
  Commit: 425d1aad294f1132ed90d79ff51320ac2dfcb72d
      https://github.com/llvm/llvm-project/commit/425d1aad294f1132ed90d79ff51320ac2dfcb72d
  Author: Luke Lau <luke at igalia.com>
  Date:   2025-04-25 (Fri, 25 Apr 2025)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp
    M llvm/test/Analysis/CostModel/RISCV/reduce-fadd.ll

  Log Message:
  -----------
  [RISCV] Handle scalarized reductions in getArithmeticReductionCost

This fixes a crash reported at
https://github.com/llvm/llvm-project/pull/114250#issuecomment-2813686061

If the vector type isn't legal at all, e.g. bfloat with +zvfbfmin,
then the legalized type will be scalarized. So use getScalarType()
instead of getVectorElement() when checking for f16/bf16.

(cherry picked from commit 053451cb3502144564b4d0b30a9046045d1820d4)



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