Re: [PATCH] Ignore debug insns with CONCAT and CONCATN for insn scheduling

[Jeff Law via Gcc-patches]

On 9/2/2022 8:36 AM, H.J. Lu via Gcc-patches wrote:
CONCAT and CONCATN never appear in the insn chain.  They are only used
in debug insn.  Ignore debug insns with CONCAT and CONCATN for insn
scheduling to avoid different insn orders with and without debug insn.

gcc/

        PR rtl-optimization/106746
        * sched-deps.cc (sched_analyze_2): Ignore debug insns with CONCAT
        and CONCATN.
Shouldn't we be ignoring everything in a debug insn?   I don't see why 
CONCAT/CONCATN are special here.

jeff