[Bug debug/83728] [8 regression] FAIL: gcc.dg/guality/pr68037-1.c

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83728

--- Comment #4 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Jakub Jelinek from comment #2)
> So, one problem here is that the debug marker for line 33 is moved by sched2
> too early (unnecessarily), before the prologue, before statement frontiers
> introduction we'd break only after the prologue.
> Perhaps we should tweak the scheduler so that it attempts harder not to move
> debug markers before the prologue, unless really necessary?
> 
> And another bug which I'll try to fix is that the .debug_frame generated
> with -fdwarf2-cfi-asm is wrong on the very first insn in the interrupt
> function, for -fno-dwarf2-cfi-asm it is right.  Apparently the interrupt
> attribute functions have CFI with a different initial offset, the CIE with
> -fdwarf2-cfi-asm has initial offset of cfa-8 like normal functions, and
> right after the very first insn in the interrupt function fn, which is a
> push, the offset becomes cfa-24,
> while with -fno-dwarf2-cfi-asm we start with cfa-16 in the CIE and after the
> push get cfa-16.

Is this related to PR 81570?