gcc/testsuite/gcc.dg/vect/no-scevccp-vect-iv-3.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-do compile } */
   4 /* { dg-require-effective-target vect_int } */
   5
   6 #include <stdarg.h>
   7 #include "tree-vect.h"
   8
   9 #if VECTOR_BITS > 256
  10 #define N (VECTOR_BITS / 16 + 10)
  11 #else
  12 #define N 26
  13 #endif
  14
  15 __attribute__ ((noinline))
  16 unsigned int main1 ()
  17 {
  18   unsigned short i;
  19   unsigned int intsum = 0;
  20
  21   /* vectorization of reduction with induction, and widenning sum:
  22      sum shorts into int.
  23      Need -fno-tree-scev-cprop or else the loop is eliminated.  */
  24   for (i = 0; i < N; i++)
  25     {
  26       intsum += i;
  27     }
  28
  29   return intsum;
  30 }
  31
  32 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target vect_widen_sum_hi_to_si } } } */
  33 /* { dg-final { scan-tree-dump-times "vect_recog_widen_sum_pattern: detected(?:(?!Analysis failed).)*Analysis succeeded" 1 "vect" { target vect_widen_sum_hi_to_si } } } */