gcc/testsuite/gcc.dg/vect/no-fast-math-vect16.c

   1 /* Disabling epilogues until we find a better way to deal with scans.  */
   2 /* { dg-additional-options "--param vect-epilogues-nomask=0" } */
   3 /* { dg-require-effective-target vect_float_strict } */
   4
   5 #include <stdarg.h>
   6 #include "tree-vect.h"
   7
   8 #define N 16
   9 #define DIFF 240
  10
  11 __attribute__ ((noinline))
  12 int main1 ()
  13 {
  14   int i;
  15   float b[N] = {0,3,6,9,12,15,18,21,24,27,30,33,36,39,42,45};
  16   float c[N] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15};
  17   float diff;
  18
  19   diff = 0;
  20   for (i = 0; i < N; i++) {
  21     diff += (b[i] - c[i]);
  22   }
  23
  24   /* check results:  */
  25   if (diff != DIFF)
  26     abort ();
  27
  28   return 0;
  29 }
  30
  31 int main (void)
  32 {
  33   check_vect ();
  34
  35   return main1 ();
  36 }
  37
  38 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
  39 /* { dg-final { scan-tree-dump-times {using an in-order \(fold-left\) reduction} 1 "vect" } } */