gcc/testsuite/gcc.dg/vect/bb-slp-23.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 int a[N], b[N];
  12
  13 __attribute__ ((noinline)) int
  14 main1 (unsigned int x, unsigned int y)
  15 {
  16   int i;
  17   unsigned int a0, a1, a2, a3;
  18
  19   /* This statement is ignored in vectorization of this basic block.  */
  20   a[x] = b [y];
  21
  22   a0 = in[0] + 23;
  23   a1 = in[1] + 142;
  24   a2 = in[2] + 2;
  25   a3 = in[3] + 31;
  26
  27   out[0] = a0 * x;
  28   out[1] = a1 * y;
  29   out[2] = a2 * x;
  30   out[3] = a3 * y;
  31
  32   if (x)
  33     __asm__ volatile ("" : : : "memory");
  34
  35   /* Check results.  */
  36   if (out[0] != (in[0] + 23) * x
  37       || out[1] != (in[1] + 142) * y
  38       || out[2] != (in[2] + 2) * x
  39       || out[3] != (in[3] + 31) * y)
  40     abort();
  41
  42   return 0;
  43 }
  44
  45 int main (void)
  46 {
  47   check_vect ();
  48
  49   main1 (2, 3);
  50
  51   return 0;
  52 }
  53
  54 /* { dg-final { scan-tree-dump-times "basic block vectorized using SLP" 1 "slp" { target vect_int_mult } } } */
  55 /* { dg-final { cleanup-tree-dump "slp" } } */
  56