gcc/testsuite/gcc.dg/pr46614.c

   1 /* PR rtl-optimization/46614 */
   2 /* { dg-do run } */
   3 /* { dg-options "-O -fno-rename-registers -fsched2-use-superblocks -fschedule-insns2 -funroll-loops" } */
   4
   5 extern void abort (void);
   6
   7 struct S
   8 {
   9   unsigned char a;
  10   unsigned char b;
  11   unsigned int c;
  12   unsigned int e;
  13   unsigned char f;
  14   unsigned int g;
  15 };
  16
  17 void bar (struct S *x)
  18 {
  19   int i;
  20   struct S *p = x;
  21   struct S r[16];
  22   unsigned j;
  23   for (i = 0; i < 16; i++)
  24     {
  25       r[i].c = p->b + p->c;
  26       j = p->c + p->f;
  27       r[i].a = j + p->b;
  28       r[i].f = p->f + p->e;
  29       r[i].g = p->b + p->c;
  30     }
  31   for (i = 0; i < 16; i++)
  32     {
  33       if (r[i].c != x[i].b + x[i].c
  34           || r[i].a != x[i].c + x[i].f + x[i].b
  35           || r[i].f != x[i].f + x[i].e
  36           || r[i].g != x[i].b + x[i].c)
  37         abort ();
  38     }
  39   for (i = 0; i < 16; i++)
  40     {
  41       r[i].b = p->c;
  42       if (r[i].b != x[i].c)
  43         abort ();
  44     }
  45 }
  46
  47 int
  48 main ()
  49 {
  50   int i;
  51   struct S x[16];
  52   for (i = 0; i < 16; i++)
  53     x[i].b = x[i].c = x[i].e = x[i].f = 5;
  54   bar (x);
  55   return 0;
  56 }