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 #if VECTOR_BITS > 256
   8 #define N (VECTOR_BITS / 16 + 10)
   9 #else
  10 #define N 26
  11 #endif
  12
  13 __attribute__ ((noinline))
  14 unsigned int main1 ()
  15 {
  16   unsigned short i;
  17   unsigned int intsum = 0;
  18
  19   /* vectorization of reduction with induction, and widenning sum:
  20      sum shorts into int.
  21      Need -fno-tree-scev-cprop or else the loop is eliminated.  */
  22   for (i = 0; i < N; i++)
  23     {
  24       intsum += i;
  25     }
  26
  27   return intsum;
  28 }
  29
  30 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target vect_widen_sum_hi_to_si } } } */
  31 /* { dg-final { scan-tree-dump-times "vect_recog_widen_sum_pattern: detected" 1 "vect" { target vect_widen_sum_hi_to_si } } } */