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kit
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agg_nested.c (579B)

      1 /* A NESTED struct: an inner struct embedded in an outer one, accessed via
      2  * chained member offsets (outer.inner.field). Exercises nested field offset
      3  * computation in loads/stores. Passed by pointer to keep the access pattern
      4  * about offset math. Result: 10 + 12 + 20 = 42. */
      5 struct Inner {
      6   int x;
      7   int y;
      8 };
      9 struct Outer {
     10   int tag;
     11   struct Inner in;
     12 };
     13 __attribute__((noinline)) static int eval(struct Outer* o) {
     14   return o->tag + o->in.x + o->in.y;
     15 }
     16 int test_main(void) {
     17   volatile int a = 10, b = 12, c = 20;
     18   struct Outer o = {a, {b, c}};
     19   return eval(&o);
     20 }