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// PR c++/4401

// PR c++/4401

// This testcase was miscompiled on 64-bit platforms, resulting to

// This testcase was miscompiled on 64-bit platforms, resulting to

// operating on a[0x100000000] instead of a[0].

// operating on a[0x100000000] instead of a[0].

// { dg-do run }

// { dg-do run }

// { dg-options "-O2" }

// { dg-options "-O2" }

char *a;

char *a;

char b[] = "AAAA";

char b[] = "AAAA";

extern "C" void abort (void);

extern "C" void abort (void);

extern "C" void exit (int);

extern "C" void exit (int);

void foo (void)

void foo (void)

{

{

  unsigned int i, j;

  unsigned int i, j;

  i = 2;

  i = 2;

  j = 3;

  j = 3;

  a[i + 1 - j] += i;

  a[i + 1 - j] += i;

}

}

int main (void)

int main (void)

{

{

  a = b;

  a = b;

  foo ();

  foo ();

  if (b[0] != 'A' + 2)

  if (b[0] != 'A' + 2)

    abort ();

    abort ();

  exit (0);

  exit (0);

}

}