gcc/testsuite/gcc.target/aarch64/struct_return.c

   1 /* Test the absence of a spurious move from x8 to x0 for functions
   2    return structures.  */
   3 /* { dg-do compile } */
   4 /* { dg-options "-O2" } */
   5
   6 struct s
   7 {
   8   long x;
   9   long y;
  10   long z;
  11 };
  12
  13 struct s __attribute__((noinline))
  14 foo (long a, long d, long c)
  15 {
  16   struct s b;
  17   b.x = a;
  18   b.y = d;
  19   b.z = c;
  20   return b;
  21 }
  22
  23 int
  24 main (void)
  25 {
  26   struct s x;
  27   x = foo ( 10, 20, 30);
  28   return x.x + x.y + x.z;
  29 }
  30
  31 /* { dg-final { scan-assembler-not "mov\tx0, x8" } } */