modernc.org/ccgo/v3@v3.16.14/lib/testdata/gcc-9.1.0/gcc/testsuite/gcc.c-torture/execute/920603-1.c (about)

     1  f(got){if(got!=0xffff)abort();}
     2  main(){signed char c=-1;unsigned u=(unsigned short)c;f(u);exit(0);}