gcc/testsuite/gcc.dg/vect/no-scevccp-vect-iv-3.c

   1 /* { dg-do compile } */
   2 /* { dg-require-effective-target vect_int } */
   3
   4 #include <stdarg.h>
   5 #include "tree-vect.h"
   6
   7 #define N 26
   8
   9 __attribute__ ((noinline))
  10 unsigned int main1 ()
  11 {
  12   unsigned short i;
  13   unsigned int intsum = 0;
  14
  15   /* vectorization of reduction with induction, and widenning sum:
  16      sum shorts into int.
  17      Need -fno-tree-scev-cprop or else the loop is eliminated.  */
  18   for (i = 0; i < N; i++)
  19     {
  20       intsum += i;
  21     }
  22
  23   return intsum;
  24 }
  25
  26 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target vect_widen_sum_hi_to_si } } } */
  27 /* { dg-final { scan-tree-dump-times "vect_recog_widen_sum_pattern: detected" 1 "vect" { target vect_widen_sum_hi_to_si } } } */
  28 /* { dg-final { cleanup-tree-dump "vect" } } */