> Isn't pass_dwarf2_frame enabled whenever we're generating any unwind info?

Essentially, yes:

static bool
gate_dwarf2_frame (void)
{
#ifndef HAVE_prologue
  /* Targets which still implement the prologue in assembler text
     cannot use the generic dwarf2 unwinding.  */
  return false;
#endif

  /* ??? What to do for UI_TARGET unwinding?  They might be able to benefit
     from the optimized shrink-wrapping annotations that we will compute.
     For now, only produce the CFI notes for dwarf2.  */
  return dwarf2out_do_frame ();
}

-- 
Eric Botcazou

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