https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93199
--- Comment #21 from Martin Liška <marxin at gcc dot gnu.org> ---
> Well - there's the leh_state passed to both callers of the function
> so I expected a patch to amend that rather than adding an on-the-side
> caching hash-map. So basically whenever we push a non-CLEANUP
> update leh_state->xyz and when backtracking update it back (the whole
> process looked recursive from a quick look).
Yes, it's recurring, but leh_state instances are different:
#0 cleanup_is_dead_in (reg=0x7ffff5e94478) at
/home/marxin/Programming/gcc/gcc/tree-eh.c:1640
#1 0x00000000010c0ca6 in lower_try_finally (state=0x7fffffffc060,
tp=0x7ffff2f0f4d0) at /home/marxin/Programming/gcc/gcc/tree-eh.c:1676
#2 0x00000000010c1cdf in lower_eh_constructs_2 (state=0x7fffffffc060,
gsi=0x7fffffffc020) at /home/marxin/Programming/gcc/gcc/tree-eh.c:2099
#3 0x00000000010c1e8a in lower_eh_constructs_1 (state=0x7fffffffc060,
pseq=0x7ffff2f0f4c0) at /home/marxin/Programming/gcc/gcc/tree-eh.c:2158
#4 0x00000000010c0d53 in lower_try_finally (state=0x7fffffffc220,
tp=0x7ffff2f0f498) at /home/marxin/Programming/gcc/gcc/tree-eh.c:1693
#5 0x00000000010c1cdf in lower_eh_constructs_2 (state=0x7fffffffc220,
gsi=0x7fffffffc1e0) at /home/marxin/Programming/gcc/gcc/tree-eh.c:2099
#6 0x00000000010c1e8a in lower_eh_constructs_1 (state=0x7fffffffc220,
pseq=0x7ffff2f0f488) at /home/marxin/Programming/gcc/gcc/tree-eh.c:2158
#7 0x00000000010c0d53 in lower_try_finally (state=0x7fffffffc3e0,
tp=0x7ffff2f0f460) at /home/marxin/Programming/gcc/gcc/tree-eh.c:1693
#8 0x00000000010c1cdf in lower_eh_constructs_2 (state=0x7fffffffc3e0,
gsi=0x7fffffffc3a0) at /home/marxin/Programming/gcc/gcc/tree-eh.c:2099
#9 0x00000000010c1e8a in lower_eh_constructs_1 (state=0x7fffffffc3e0,
pseq=0x7ffff2f0f450) at /home/marxin/Programming/gcc/gcc/tree-eh.c:2158
#10 0x00000000010c0d53 in lower_try_finally (state=0x7fffffffc5a0,
tp=0x7ffff2f0f428) at /home/marxin/Programming/gcc/gcc/tree-eh.c:1693
#11 0x00000000010c1cdf in lower_eh_constructs_2 (state=0x7fffffffc5a0,
gsi=0x7fffffffc560) at /home/marxin/Programming/gcc/gcc/tree-eh.c:2099
#12 0x00000000010c1e8a in lower_eh_constructs_1 (state=0x7fffffffc5a0,
pseq=0x7ffff2f0f418) at /home/marxin/Programming/gcc/gcc/tree-eh.c:2158
#13 0x00000000010c0d53 in lower_try_finally (state=0x7fffffffc760,
tp=0x7ffff2f0f3f0) at /home/marxin/Programming/gcc/gcc/tree-eh.c:1693
#14 0x00000000010c1cdf in lower_eh_constructs_2 (state=0x7fffffffc760,
gsi=0x7fffffffc720) at /home/marxin/Programming/gcc/gcc/tree-eh.c:2099
#15 0x00000000010c1e8a in lower_eh_constructs_1 (state=0x7fffffffc760,
pseq=0x7ffff2f0f3e0) at /home/marxin/Programming/gcc/gcc/tree-eh.c:2158
#16 0x00000000010c0d53 in lower_try_finally (state=0x7fffffffc920,
tp=0x7ffff2f0f3b8) at /home/marxin/Programming/gcc/gcc/tree-eh.c:1693
#17 0x00000000010c1cdf in lower_eh_constructs_2 (state=0x7fffffffc920,
gsi=0x7fffffffc8e0) at /home/marxin/Programming/gcc/gcc/tree-eh.c:2099
#18 0x00000000010c1e8a in lower_eh_constructs_1 (state=0x7fffffffc920,
pseq=0x7ffff2f0f3a8) at /home/marxin/Programming/gcc/gcc/tree-eh.c:2158
#19 0x00000000010c0d53 in lower_try_finally (state=0x7fffffffcae0,
tp=0x7ffff2f0f380) at /home/marxin/Programming/gcc/gcc/tree-eh.c:1693
#20 0x00000000010c1cdf in lower_eh_constructs_2 (state=0x7fffffffcae0,
gsi=0x7fffffffcaa0) at /home/marxin/Programming/gcc/gcc/tree-eh.c:2099
where a new 'state' is always created here:
1769 static gimple_seq
1770 lower_catch (struct leh_state *state, gtry *tp)
1771 {
1772 eh_region try_region = NULL;
1773 struct leh_state this_state = *state;
...
