[Bug rtl-optimization/94618] [8/9/10 Regression] '-fcompare-debug' failure (length) with -O2 -fnon-call-exceptions since r8-565-g7581ce9a1ad6df9c

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94618

--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Though, a slight advantage of the patch as is is that it will do any insn walk
only if two conditions are met, BB_END is a DEBUG_INSN and insn is followed by
a DEBUG_INSN.  My thoughs were that there could be a large bb with hundreds of
DEBUG_INSNs at the end and if we e.g. started deleting insn from the start,
even if they aren't really followed by any DEBUG_INSNs, we'd still walk all of
them each time.