[Bug tree-optimization/107937] [13 Regression] ICE in find_var_cmp_const, at gimple-predicate-analysis.cc:257 since r13-4408-gb628cad9e093f7a3

["marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107937

--- Comment #6 from Martin Liška <marxin at gcc dot gnu.org> ---
Another test-case:

$ cat warn.i
int regs, vm_debug_engine_vp_0, vm_debug_engine_vp_2;

void
vm_dispatch_hook();


void
vm_debug_engine() {
  int fp;
  void *jump_table = &&l_nop;
l_nop:
  if (__builtin_expect(vm_debug_engine_vp_2, 0))
    vm_dispatch_hook();
  if (_setjmp(regs)) {
    fp = fp;
    vm_dispatch_hook();
    goto *jump_table;
  }
  vm_debug_engine_vp_0 = fp;
}

$ gcc -c warn.i -O1 -Wall
warn.i: In function ‘vm_debug_engine’:
warn.i:14:7: warning: implicit declaration of function ‘_setjmp’
[-Wimplicit-function-declaration]
   14 |   if (_setjmp(regs)) {
      |       ^~~~~~~
during GIMPLE pass: uninit
warn.i:8:1: internal compiler error: in find_var_cmp_const, at
gimple-predicate-analysis.cc:257
    8 | vm_debug_engine() {
      | ^~~~~~~~~~~~~~~
0x84abb6 find_var_cmp_const
        /home/marxin/Programming/gcc/gcc/gimple-predicate-analysis.cc:257
0x1c83ff2 uninit_analysis::overlap(gphi*, unsigned int, hash_set<gphi*, false,
default_hash_traits<gphi*> >*, predicate const&)
        /home/marxin/Programming/gcc/gcc/gimple-predicate-analysis.cc:648
0x1c83b45 uninit_analysis::is_use_guarded(gimple*, basic_block_def*, gphi*,
unsigned int, hash_set<gphi*, false, default_hash_traits<gphi*> >*)
        /home/marxin/Programming/gcc/gcc/gimple-predicate-analysis.cc:2215
0x1c840ea uninit_analysis::is_use_guarded(gimple*, basic_block_def*, gphi*,
unsigned int)
        /home/marxin/Programming/gcc/gcc/gimple-predicate-analysis.cc:2249
0x11188e7 find_uninit_use
        /home/marxin/Programming/gcc/gcc/tree-ssa-uninit.cc:1234
0x111923e warn_uninitialized_phi
        /home/marxin/Programming/gcc/gcc/tree-ssa-uninit.cc:1304
0x111923e execute_late_warn_uninitialized
        /home/marxin/Programming/gcc/gcc/tree-ssa-uninit.cc:1425
0x111923e execute
        /home/marxin/Programming/gcc/gcc/tree-ssa-uninit.cc:1442
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