modernc.org/cc@v1.0.1/testdata/gcc-6.3.0/gcc/testsuite/gcc.c-torture/execute/920721-2.c (about)

     1  /* { dg-skip-if "requires alloca" { ! alloca } { "-O0" } { "" } } */
     2  f(){}
     3  main(){int n=2;double x[n];f();exit(0);}