[Bug middle-end/27173] [4.0 regression] ICE with -O -ftrapv

[reichelt at gcc dot gnu dot org]

------- Comment #3 from reichelt at gcc dot gnu dot org  2006-04-19 20:07 
-------
Confirmed.

Reduced testcase (compile with "-O -ftrapv"):

==================================
char *p, *q;

inline int foo(int i)
{
  return (p - q) + i;
}

void bar()
{
  int n, i;

  for (n = 7; n-- > 0; )
    for (i = n; i-- > 0; )
      if (i)
        p += -foo(i-1);
}
==================================

The testcase eats more than 2 GB of memory within seconds.
This happens with C and C++ frontend.

The bug only affects the 4.0 branch.


-- 

reichelt at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |reichelt at gcc dot gnu dot
                   |                            |org
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
           Keywords|                            |monitored
      Known to fail|                            |4.0.1 4.0.3
      Known to work|                            |3.4.6 4.1.0
   Last reconfirmed|0000-00-00 00:00:00         |2006-04-19 20:07:03
               date|                            |
            Summary|ICE with -O -ftrapv         |[4.0 regression] ICE with -O
                   |                            |-ftrapv
   Target Milestone|---                         |4.0.4


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27173