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Date: Mon, 03 Jan 2005 22:41:00 -0000
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From: "pinskia at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/18241] [4.0 Regression] linux kernel loop gets miscompiled
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------- Additional Comments From pinskia at gcc dot gnu dot org  2005-01-03 22:41 -------
Here is the most reduced testcase:
void abort (void);

int f(int i1243)
{
  int i[2], *i1 = i;
  i[0] = 1;
  volatile int *i2 = i1;
  i2[1] = 1;
  i1243 = 0;
  return i2[1]+i2[0];
}


int main(void)
{
  if( f(100) != 2)
   abort ();
  return 0;
}

Notice we remove i[0] = 1

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18241