kit

kit
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agg_byval_big.c (575B)

      1 /* A struct LARGER than 16 bytes (five ints, 20 bytes) passed by value. On the
      2  * AArch64 PCS an aggregate > 16 bytes is passed indirectly: the caller copies
      3  * it to a hidden stack slot and passes a pointer. Exercises the byval-by-memory
      4  * lowering (caller-side memcpy/stores + pointer arg). sum of 2+4+6+8+22 = 42.
      5  */
      6 struct Five {
      7   int a, b, c, d, e;
      8 };
      9 __attribute__((noinline)) static int sum5(struct Five s) {
     10   return s.a + s.b + s.c + s.d + s.e;
     11 }
     12 int test_main(void) {
     13   volatile int x = 2;
     14   struct Five s = {x, x + 2, x + 4, x + 6, x + 20};
     15   return sum5(s);
     16 }