gcc/testsuite/gcc.dg/vect/slp-reduc-5.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 128
   8
   9 int c[N];
  10
  11 /* Vectorization of reduction using loop-aware SLP.  */
  12
  13 __attribute__ ((noinline))
  14 int main1 (int n, int res0, int res1)
  15 {
  16   int i;
  17   int max0 = -100, max1 = -313;
  18
  19   for (i = 0; i < n; i++) {
  20     max1 = max1 < c[2*i+1] ? c[2*i+1] : max1;
  21     max0 = max0 < c[2*i] ? c[2*i] : max0;
  22   }
  23
  24   /* Check results:  */
  25   if (max0 != res0
  26       || max1 != res1)
  27     abort ();
  28
  29   return 0;
  30 }
  31
  32 int main (void)
  33 {
  34   int i;
  35
  36   check_vect ();
  37
  38   for (i = 0; i < N; i++)
  39     c[i] = (i+3) * -1;
  40
  41   c[0] = c[1] = -100;
  42   main1 (N/2, -5, -6);
  43   return 0;
  44 }
  45
  46 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 2 "vect" { xfail vect_no_int_max } } } */
  47 /* { dg-final { scan-tree-dump-times "vectorizing stmts using SLP" 1 "vect" { xfail vect_no_int_max } } } */
  48 /* { dg-final { cleanup-tree-dump "vect" } } */
  49