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/* { dg-do  run  } */

/* { dg-skip-if "doubles are floats" { "avr-*-*" } { "*" } { "" } } */

/* { dg-options "-O2 -fmath-errno -fdump-tree-cdce-details  -lm" } */

/* { dg-final { scan-tree-dump  "cdce2.c:16: note: function call is shrink-wrapped into error conditions\." "cdce" } }*/

/* { dg-final { cleanup-tree-dump "cdce" } } */

#include <stdlib.h>

#include <math.h>

#include <errno.h>

int total_err_count = 0;

double foo_opt (double y) __attribute__((noinline));

double foo_opt (double y)

{

  double yy = 0;

  errno = 0;

  yy = log (y);

  return 0;

}

double foo (double y) __attribute__((noinline));

double foo (double y)

{

  double yy = 0;

  errno = 0;

  yy = log (y);

  return yy;

}

int test (double (*fp) (double y))

{

  int i,x;

  for (i = -100; i < 100; i++)

    {

      fp (i);

      if (errno)

        total_err_count ++;

    }

  return total_err_count;

}

int main ()

{

  int en1, en2;

  double yy;

  total_err_count = 0;

  en1 = test (foo_opt);

  total_err_count = 0;

  en2 = test (foo);

  if (en1 != en2)

    abort();

  return 0;

}