modernc.org/ccgo/v3@v3.16.14/lib/testdata/gcc-9.1.0/gcc/testsuite/gcc.c-torture/execute/pr34456.c (about) 1 /* { dg-skip-if "requires qsort" { freestanding } } */ 2 3 #include <stdlib.h> 4 5 int __attribute__ ((noinline)) debug (void) { return 1; } 6 int errors; 7 8 struct s { int elt; int (*compare) (int); }; 9 10 static int 11 compare (const void *x, const void *y) 12 { 13 const struct s *s1 = x, *s2 = y; 14 int (*compare1) (int); 15 int elt2; 16 17 compare1 = s1->compare; 18 elt2 = s2->elt; 19 if (elt2 != 0 && debug () && compare1 (s1->elt) != 0) 20 errors++; 21 return compare1 (elt2); 22 } 23 24 int bad_compare (int x) { return -x; } 25 struct s array[2] = { { 1, bad_compare }, { -1, bad_compare } }; 26 27 int 28 main (void) 29 { 30 qsort (array, 2, sizeof (struct s), compare); 31 return errors == 0; 32 }