gcc/testsuite/gcc.dg/ipa/ipa-icf-12.c

/* { dg-do compile } */
/* { dg-options "-O2 -fdump-ipa-icf-optimized"  } */

#include <stdlib.h>
#include <stdio.h>

int gcd(int x, int y) __attribute__ ((pure));

__attribute__ ((noinline))
int gcd(int x, int y)
{
  int swap;

  if(x <= 0 || y <= 0)
    return 0;

  if(x < y)
    {
      swap = x;
      x = y;
      y = swap;
    }

  while(x != y)
    {
      x = x - y;

      if(y > x)
	{
	  swap = x;
	  x = y;
	  y = swap;
	}
    }

  return x;
}

int nsd(int x, int y) __attribute__ ((pure));

__attribute__ ((noinline))
int nsd(int x, int y)
{
  int swap;

  if(x <= 0 || y <= 0)
    return 0;

  if(x < y)
    {
      swap = x;
      x = y;
      y = swap;
    }

  while(x != y)
    {
      x = x - y;

      if(y > x)
	{
	  swap = x;
	  x = y;
	  y = swap;
	}
    }

  return x;
}

int main(int argc, char **argv)
{
  return 0;
}

/* { dg-final { scan-ipa-dump "Semantic equality hit:gcd/\[0-9+\]+->nsd/\[0-9+\]+" "icf"  } } */
/* { dg-final { scan-ipa-dump "Equal symbols: 1" "icf"  } } */