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 /* { dg-require-effective-target scheduling } */
   5
   6 extern void abort (void);
   7
   8 struct S
   9 {
  10   unsigned char a;
  11   unsigned char b;
  12   unsigned int c;
  13   unsigned int e;
  14   unsigned char f;
  15   unsigned int g;
  16 };
  17
  18 void bar (struct S *x)
  19 {
  20   int i;
  21   struct S *p = x;
  22   struct S r[16];
  23   unsigned j;
  24   for (i = 0; i < 16; i++)
  25     {
  26       r[i].c = p->b + p->c;
  27       j = p->c + p->f;
  28       r[i].a = j + p->b;
  29       r[i].f = p->f + p->e;
  30       r[i].g = p->b + p->c;
  31     }
  32   for (i = 0; i < 16; i++)
  33     {
  34       if (r[i].c != x[i].b + x[i].c
  35           || r[i].a != x[i].c + x[i].f + x[i].b
  36           || r[i].f != x[i].f + x[i].e
  37           || r[i].g != x[i].b + x[i].c)
  38         abort ();
  39     }
  40   for (i = 0; i < 16; i++)
  41     {
  42       r[i].b = p->c;
  43       if (r[i].b != x[i].c)
  44         abort ();
  45     }
  46 }
  47
  48 int
  49 main ()
  50 {
  51   int i;
  52   struct S x[16];
  53   for (i = 0; i < 16; i++)
  54     x[i].b = x[i].c = x[i].e = x[i].f = 5;
  55   bar (x);
  56   return 0;
  57 }