[Bug target/120228] New: Need to call df_insn_rescan after emit_insn

[hjl.tools at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120228

            Bug ID: 120228
           Summary: Need to call df_insn_rescan after emit_insn
           Product: gcc
           Version: 16.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hjl.tools at gmail dot com
                CC: liuhongt at gcc dot gnu.org
  Target Milestone: ---
            Target: x86-64

i386 backend has codes like

          set_insn = emit_insn_before (set, insn);
          df_insn_rescan (set_insn);

df_insn_rescan isn't needed since df_insn_rescan has been called by
emit_insn_before.