[all-commits] [llvm/llvm-project] 2a6cc9: [SystemZ] Support pseudo fmin/fmax (#209178)

[Nikita Popov via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 2a6cc991cc691f2cc666483c417f01675321ce2c
      https://github.com/llvm/llvm-project/commit/2a6cc991cc691f2cc666483c417f01675321ce2c
  Author: Nikita Popov <npopov at redhat.com>
  Date:   2026-07-14 (Tue, 14 Jul 2026)

  Changed paths:
    M llvm/lib/Target/SystemZ/SystemZISelLowering.cpp
    M llvm/lib/Target/SystemZ/SystemZISelLowering.h
    M llvm/lib/Target/SystemZ/SystemZInstrVector.td
    M llvm/test/CodeGen/SystemZ/vec-max-05.ll
    M llvm/test/CodeGen/SystemZ/vec-max-min-zerosplat.ll
    M llvm/test/CodeGen/SystemZ/vec-min-05.ll

  Log Message:
  -----------
  [SystemZ] Support pseudo fmin/fmax (#209178)

s390x supports the pseudo fmin/fmax operations (x < y ? x : y and x > y
? x : y) as mode 2 in vfmin/vfmax. As such, we should lower
PSEUDO_FMIN/FMAX to those. Also disable formation of minnum/maxnum in
SDAGBuilder, as it's not useful if we have native support for this
operation.



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