[all-commits] [llvm/llvm-project] 81a343: [CodeGen] More consistently expand float ops by de...

[Nikita Popov via All-commits]

  Branch: refs/heads/release/21.x
  Home:   https://github.com/llvm/llvm-project
  Commit: 81a3436485f262a2d8ed14b8bbf22dcfb9c6f110
      https://github.com/llvm/llvm-project/commit/81a3436485f262a2d8ed14b8bbf22dcfb9c6f110
  Author: Nikita Popov <npopov at redhat.com>
  Date:   2025-07-29 (Tue, 29 Jul 2025)

  Changed paths:
    M llvm/lib/CodeGen/TargetLoweringBase.cpp
    M llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp
    M llvm/lib/Target/ARM/ARMISelLowering.cpp
    A llvm/test/CodeGen/PowerPC/froundeven-legalization.ll

  Log Message:
  -----------
  [CodeGen] More consistently expand float ops by default (#150597)

These float operations were expanded for scalar f32/f64/f128, but not
for f16 and more problematically, not for vectors. A small subset of
them was separately set to expand for vectors.

Change these to always expand by default, and adjust targets to mark
these as legal where necessary instead.

This is a much safer default, and avoids unnecessary legalization
failures because a target failed to manually mark them as expand.

Fixes https://github.com/llvm/llvm-project/issues/110753.
Fixes https://github.com/llvm/llvm-project/issues/121390.

(cherry picked from commit fe0dbe0f2950d95071be7140c7b4680f17a7ac4e)



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