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From: "belyshev at lubercy dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/17133] New: [3.5 Regression] wrong code with -ftree-loop-optimize
Date: Sat, 21 Aug 2004 20:58:00 -0000	[thread overview]
Message-ID: <20040821205808.17133.belyshev@lubercy.com> (raw)

use '-O1' to repeat:
------------------------------------------------------------------------------
extern void abort (void);

int foo = 0;
void *bar = 0;
unsigned int baz = 100;

void *pure_alloc ()
{
  void *res;
  
  while (1)
    {
      res = (void *) ((((unsigned int) (foo + bar))) & ~1);
      foo += 2;
      if (foo < baz)
	return res;
      foo = 0;
    }
}

int main ()
{
  pure_alloc ();
  if (!foo)
    abort ();
  return 0;
}
------------------------------------------------------------------------------

-- 
           Summary: [3.5 Regression] wrong code with -ftree-loop-optimize
           Product: gcc
           Version: 3.5.0
            Status: UNCONFIRMED
          Keywords: wrong-code
          Severity: normal
          Priority: P2
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: belyshev at lubercy dot com
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17133


             reply	other threads:[~2004-08-21 20:58 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-08-21 20:58 belyshev at lubercy dot com [this message]
2004-08-21 21:13 ` [Bug tree-optimization/17133] [3.5 Regression] wrong code with -ftree-lim pinskia at gcc dot gnu dot org
2004-08-31 23:49 ` belyshev at lubercy dot com
2004-09-01 21:19 ` rakdver at atrey dot karlin dot mff dot cuni dot cz
2004-09-05  9:02 ` rakdver at atrey dot karlin dot mff dot cuni dot cz
2004-09-08 18:37 ` pinskia at gcc dot gnu dot org
2004-09-11 20:38 ` rakdver at gcc dot gnu dot org
2004-09-12 18:39 ` [Bug tree-optimization/17133] [4.0 " rakdver at gcc dot gnu dot org
2004-10-17 20:30 ` giovannibajo at libero dot it
2004-10-27 17:46 ` cvs-commit at gcc dot gnu dot org
2004-10-29  5:43 ` pinskia at gcc dot gnu dot org

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