modernc.org/ccgo/v3@v3.16.14/lib/testdata/gcc-9.1.0/gcc/testsuite/gcc.c-torture/execute/struct-aliasing-1.c (about) 1 struct S { float f; }; 2 int __attribute__((noinline)) 3 foo (int *r, struct S *p) 4 { 5 int *q = (int *)&p->f; 6 int i = *q; 7 *r = 0; 8 return i + *q; 9 } 10 extern void abort (void); 11 int main() 12 { 13 int i = 1; 14 if (foo (&i, (struct S *)&i) != 1) 15 abort (); 16 return (0); 17 }