https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97668
--- Comment #2 from Arseny Solokha <asolokha at gmx dot com> --- Finally, a C testcase: void wb (_Complex double jh) { _Complex double af = 0.0; do { af += jh; } while (af != 0.0); } _Complex double o6 (void) { _Complex double ba = 0.0; for (;;) { wb (ba); ba = 1.0; } return ba; } % gcc-11.0.0 -O1 -fanalyzer -c nzttegjf.c during IPA pass: analyzer nzttegjf.c: In function 'wb': nzttegjf.c:20:7: internal compiler error: in cmp_cst, at analyzer/svalue.cc:283 20 | wb (ba); | ^~~~~~~ 0x73dc66 cmp_cst /var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201101/work/gcc-11-20201101/gcc/analyzer/svalue.cc:283 0x19296e0 cmp1<sort_ctx> /var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201101/work/gcc-11-20201101/gcc/sort.cc:153 0x1929734 netsort<sort_ctx> /var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201101/work/gcc-11-20201101/gcc/sort.cc:170 0x1929734 mergesort<sort_ctx> /var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201101/work/gcc-11-20201101/gcc/sort.cc:207 0x1929cc2 gcc_qsort(void*, unsigned long, unsigned long, int (*)(void const*, void const*)) /var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201101/work/gcc-11-20201101/gcc/sort.cc:266 0x18c2311 vec<ana::svalue const*, va_heap, vl_embed>::qsort(int (*)(void const*, void const*)) /var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201101/work/gcc-11-20201101/gcc/vec.h:1138 0x18c2311 vec<ana::svalue const*, va_heap, vl_ptr>::qsort(int (*)(void const*, void const*)) /var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201101/work/gcc-11-20201101/gcc/vec.h:2031 0x18c2311 ana::equiv_class::canonicalize() /var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201101/work/gcc-11-20201101/gcc/analyzer/constraint-manager.cc:431 0x18c2311 ana::constraint_manager::canonicalize() /var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201101/work/gcc-11-20201101/gcc/analyzer/constraint-manager.cc:1713 0x115d881 ana::program_state::prune_for_point(ana::exploded_graph&, ana::program_point const&, ana::exploded_node const*) const /var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201101/work/gcc-11-20201101/gcc/analyzer/program-state.cc:1049 0x1149245 ana::exploded_graph::get_or_create_node(ana::program_point const&, ana::program_state const&, ana::exploded_node const*) /var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201101/work/gcc-11-20201101/gcc/analyzer/engine.cc:2045 0x114c6cd ana::exploded_graph::process_node(ana::exploded_node*) /var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201101/work/gcc-11-20201101/gcc/analyzer/engine.cc:2850 0x114d47a ana::exploded_graph::process_worklist() /var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201101/work/gcc-11-20201101/gcc/analyzer/engine.cc:2523 0x114f59a ana::impl_run_checkers(ana::logger*) /var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201101/work/gcc-11-20201101/gcc/analyzer/engine.cc:4658 0x115036c ana::run_checkers() /var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201101/work/gcc-11-20201101/gcc/analyzer/engine.cc:4729 0x11424e8 execute /var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201101/work/gcc-11-20201101/gcc/analyzer/analyzer-pass.cc:84