[Bug c++/106057] Missed stmt_can_throw_external check in stmt_kills_ref_p

[hubicka at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106057

--- Comment #1 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
C only testcase (also misoptimized in clang)

#include <setjmp.h>
int b;
jmp_buf buf;

__attribute__((noinline))
int maybethrow()
{
        if (!b)
                longjmp (buf,1);
        return 2;
}

void
test(int *a)
{
        *a=1;
        *a=maybethrow();
}
int
main()
{
        int a=-1;
        if (setjmp (buf) == 1)
        {
                if (a!=1)
                        __builtin_abort ();
                        return 0;
        }
        test (&a);
        return 0;
}