no-scevccp-vect-iv-3.c

来自「用于进行gcc测试」· C语言 代码 · 共 29 行

/* { dg-do compile } */
/* { dg-require-effective-target vect_int } */

#include <stdarg.h>
#include "tree-vect.h"

#define N 26
 
__attribute__ ((noinline))
unsigned int main1 ()
{  
  unsigned short i;
  unsigned int intsum = 0;

  /* vectorization of reduction with induction, and widenning sum: 
     sum shorts into int. 
     Need -fno-tree-scev-cprop or else the loop is eliminated.  */
  for (i = 0; i < N; i++)
    {
      intsum += i;
    } 

  return intsum;
}

/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target vect_widen_sum_hi_to_si } } } */
/* { dg-final { scan-tree-dump-times "vect_recog_widen_sum_pattern: detected" 1 "vect" { target vect_widen_sum_hi_to_si } } } */
/* { dg-final { cleanup-tree-dump "vect" } } */