[all-commits] [llvm/llvm-project] 7dde60: [DAG] canCreateUndefOrPoison - add handling for IS...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 7dde6027a0791267add993ca5d4450e44b75b870
      https://github.com/llvm/llvm-project/commit/7dde6027a0791267add993ca5d4450e44b75b870
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2025-06-27 (Fri, 27 Jun 2025)

  Changed paths:
    M llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
    M llvm/test/CodeGen/AMDGPU/bf16-conversions.ll
    M llvm/test/CodeGen/RISCV/float-convert.ll
    M llvm/test/CodeGen/RISCV/rv64-float-convert.ll

  Log Message:
  -----------
  [DAG] canCreateUndefOrPoison - add handling for ISD::SELECT (#146046)

Followup to #143760 which handled ISD::VSELECT

I've moved ISD::SELECT/VSELECT under the "No poison except from flags
(which is handled above)" subgroup to try to remind people that these
can have poison generating FMFs (NINF/NNAN), even though this hasn't
been well explained anywhere I can find :(

Helps with regressions from #145939



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