gcc/testsuite/gcc.dg/vect/pr88903-1.c

   1 #include "tree-vect.h"
   2
   3 int x[1024];
   4
   5 void __attribute__((noinline))
   6 foo()
   7 {
   8   for (int i = 0; i < 512; ++i)
   9     {
  10       x[2*i] = x[2*i] << ((i+1) & 31);
  11       x[2*i+1] = x[2*i+1] << ((i+1) & 31);
  12     }
  13 }
  14
  15 int
  16 main()
  17 {
  18   check_vect ();
  19   for (int i = 0; i < 1024; ++i)
  20     x[i] = i;
  21   foo ();
  22 #pragma GCC novector
  23   for (int i = 0; i < 1024; ++i)
  24     if (x[i] != i << ((i/2+1) & 31))
  25       __builtin_abort ();
  26   return 0;
  27 }