gcc/testsuite/gcc.dg/pr114605.c

   1 /* PR target/114605 */
   2 /* { dg-do run } */
   3 /* { dg-options "-O0" } */
   4
   5 typedef struct { const float *a; int b, c; float *d; } S;
   6
   7 __attribute__((noipa)) void
   8 bar (void)
   9 {
  10 }
  11
  12 __attribute__((noinline, optimize (2))) static void
  13 foo (S *e)
  14 {
  15   const float *f;
  16   float *g;
  17   float h[4] = { 0.0, 0.0, 1.0, 1.0 };
  18   if (!e->b)
  19     f = h;
  20   else
  21     f = e->a;
  22   g = &e->d[0];
  23   __builtin_memcpy (g, f, sizeof (float) * 4);
  24   bar ();
  25   if (!e->b)
  26     if (g[0] != 0.0 || g[1] != 0.0 || g[2] != 1.0 || g[3] != 1.0)
  27       __builtin_abort ();
  28 }
  29
  30 int
  31 main ()
  32 {
  33   float d[4];
  34   S e = { .d = d };
  35   foo (&e);
  36   return 0;
  37 }