[all-commits] [llvm/llvm-project] d2fe91: [DAG] computeKnownFPClass - add ISD::FCOPYSIGN han...

[Xinlong Chen via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: d2fe91171f11bbdb138b21da9cd688632f677b51
      https://github.com/llvm/llvm-project/commit/d2fe91171f11bbdb138b21da9cd688632f677b51
  Author: Xinlong Chen <xinlongchen at tencent.com>
  Date:   2026-04-28 (Tue, 28 Apr 2026)

  Changed paths:
    M llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
    M llvm/test/CodeGen/RISCV/combine-is_fpclass.ll

  Log Message:
  -----------
  [DAG] computeKnownFPClass - add ISD::FCOPYSIGN handling (#193672)

This PR implements `ISD::FCOPYSIGN` in
`SelectionDAG::computeKnownFPClass`, propagating class info from the
magnitude operand and sign-bit info from the sign operand.

Additionally, added RISC-V test coverage for `ISD::FCOPYSIGN`.

closes #193501



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