gcc/testsuite/gcc.dg/vect/bb-slp-8b.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)
  14 {
  15   int i;
  16   unsigned int a0, a1, a2, a3;
  17   unsigned int *pin = &in[0];
  18   unsigned int *pout = &out[0];
  19
  20   /* pin and pout are different, so despite the fact that loads and stores
  21      are mixed the basic block is vectorizable.  */
  22   a0 = *pin++ + 23;
  23   *pout++ = a0 * x;
  24   a1 = *pin++ + 142;
  25   *pout++ = a1 * y;
  26   a2 = *pin++ + 2;
  27   *pout++ = a2 * x;
  28   a3 = *pin++ + 31;
  29   *pout++ = a3 * y;
  30
  31   if (i)
  32     __asm__ volatile ("" : : : "memory");
  33
  34   /* Check results.  */
  35   if (out[0] != (in[0] + 23) * x
  36       || out[1] != (in[1] + 142) * y
  37       || out[2] != (in[2] + 2) * x
  38       || out[3] != (in[3] + 31) * y)
  39     abort ();
  40
  41   return 0;
  42 }
  43
  44 int main (void)
  45 {
  46   check_vect ();
  47
  48   main1 (2, 3);
  49
  50   return 0;
  51 }
  52
  53 /* { dg-final { scan-tree-dump-times "basic block vectorized using SLP" 1 "slp"  { target vect_hw_misalign } } } */
  54 /* { dg-final { cleanup-tree-dump "slp" } } */
  55