gcc/testsuite/gcc.dg/vect/bb-slp-8a.c

   1 /* { dg-require-effective-target vect_int } */
   2
   3 #include <stdarg.h>
   4 #include "tree-vect.h"
   5
   6 #define N 16
   7
   8 unsigned int out[N];
   9 unsigned int in[N] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15};
  10
  11 __attribute__ ((noinline)) int
  12 main1 (unsigned int x, unsigned int y, unsigned int *pin, unsigned int *pout)
  13 {
  14   int i;
  15   unsigned int a0, a1, a2, a3;
  16
  17   /* pin and pout may alias, and loads and stores are mixed.  The basic block
  18      cannot be vectorized.  */
  19   a0 = *pin++ + 23;
  20   *pout++ = a0 * x;
  21   a1 = *pin++ + 142;
  22   *pout++ = a1 * y;
  23   a2 = *pin++ + 2;
  24   *pout++ = a2 * x;
  25   a3 = *pin++ + 31;
  26   *pout++ = a3 * y;
  27
  28   if (i)
  29     __asm__ volatile ("" : : : "memory");
  30
  31   /* Check results.  */
  32   if (out[0] != (in[0] + 23) * x
  33       || out[1] != (in[1] + 142) * y
  34       || out[2] != (in[2] + 2) * x
  35       || out[3] != (in[3] + 31) * y)
  36     abort ();
  37
  38   return 0;
  39 }
  40
  41 int main (void)
  42 {
  43   check_vect ();
  44
  45   main1 (2, 3, &in[0], &out[0]);
  46
  47   return 0;
  48 }
  49
  50 /* { dg-final { scan-tree-dump-times "basic block vectorized" 0 "slp2" } } */
  51