[Bug target/20810] ICE in reload_cse_simplify_operands, at postreload.c:391

[belyshev at depni dot sinp dot msu dot ru]

------- Additional Comments From belyshev at depni dot sinp dot msu dot ru  
2005-04-15 19:57 -------
// reduced testcase, compile with -O2 -mthumb

extern void foo (void);

struct bitset
{
  int a[4];
  
  void set(int pos, bool val = true)
  {
    if (val)
      a[pos/32] = 1;
  }
  
  bitset& flip()
  {
    return *this;
  }
  
  bitset operator~()
  {
    return bitset(*this).flip();
  }
  
  bool operator != (const bitset& x)
  {
    for (int i = 0; i < 4; ++i)
      if (a[i] != x.a[i])
        return false;

    return true;
  }
  
  bool test(int position)
  {
    if (position >= 64)
      foo ();
    return a[position / 32] != 0;
  }
};

int main( int argc, char *argv[] )
{
  unsigned int i, j;
  bitset b1, b2;

  b2 = ~b1;
  if (b2 != ~b1);

  for (i = j = 0; i < 65; i++)
    {
      b2.set (j);
      if (i != b1.test(j))
        foo ();
      j++;
    }
  b2 = ~b2;
}


-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|                            |1
  GCC build triplet|i686-pc-linux-gnu           |
   GCC host triplet|i686-pc-linux-gnu           |
           Keywords|                            |ice-on-valid-code
      Known to fail|                            |3.4.4
   Last reconfirmed|0000-00-00 00:00:00         |2005-04-15 19:57:02
               date|                            |
            Summary|[ARM thumb] ICE with C++    |ICE in
                   |bitsets in thumb mode       |reload_cse_simplify_operands
                   |                            |, at postreload.c:391


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20810