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

   1 /* { dg-require-effective-target vect_int } */
   2
   3 #include <stdarg.h>
   4 #include <stdio.h>
   5 #include "tree-vect.h"
   6
   7 #define N 16
   8
   9 unsigned int out[N];
  10 unsigned int in[N] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15};
  11
  12 __attribute__ ((noinline)) int
  13 main1 (unsigned int x, unsigned int y, unsigned int *pin, unsigned int *pout)
  14 {
  15   int i;
  16   unsigned int a0, a1, a2, a3;
  17
  18   /* pin and pout may alias, and loads and stores are mixed.  The basic block
  19      cannot be vectorized.  */
  20   a0 = *pin++ + 23;
  21   *pout++ = a0 * x;
  22   a1 = *pin++ + 142;
  23   *pout++ = a1 * y;
  24   a2 = *pin++ + 2;
  25   *pout++ = a2 * x;
  26   a3 = *pin++ + 31;
  27   *pout++ = a3 * y;
  28
  29   if (i)
  30     __asm__ volatile ("" : : : "memory");
  31
  32   /* Check results.  */
  33   if (out[0] != (in[0] + 23) * x
  34       || out[1] != (in[1] + 142) * y
  35       || out[2] != (in[2] + 2) * x
  36       || out[3] != (in[3] + 31) * y)
  37     abort ();
  38
  39   return 0;
  40 }
  41
  42 int main (void)
  43 {
  44   check_vect ();
  45
  46   main1 (2, 3, &in[0], &out[0]);
  47
  48   return 0;
  49 }
  50
  51 /* { dg-final { scan-tree-dump-times "basic block vectorized using SLP" 0 "slp" } } */
  52 /* { dg-final { cleanup-tree-dump "slp" } } */
  53