[Bug c/38926] New: ice in find_or_generate_expression, at tree-ssa-pre.c:2769

[regehr at cs dot utah dot edu]

Seen using r143537 on Ubuntu Hardy.

regehr@john-home:~/volatile/tmp123$ current-gcc -O3 small.c
small.c: In function ‘baz’:
small.c:59: internal compiler error: in find_or_generate_expression, at
tree-ssa-pre.c:2769
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
regehr@john-home:~/volatile/tmp123$ current-gcc -v
Using built-in specs.
Target: i686-pc-linux-gnu
Configured with: ../configure --prefix=/home/regehr/z/tmp/gcc-r143537-install
--program-prefix=r143537- --enable-languages=c,c++
Thread model: posix
gcc version 4.4.0 20090121 (experimental) (GCC) 
regehr@john-home:~/volatile/tmp123$ cat small.c
unsigned foo (int _si1, unsigned _si2)
{
  return _si1 > 0 && _si2 > 0 && _si1 > 2147483647 - _si2 && _si2;
}

signed char bar (signed char _left, int _right)
{
  return (unsigned int) _right >= 1 * 8 ? : _left >> _right;
}

unsigned g_2;
unsigned g_67;
unsigned g_111;
volatile unsigned g_162;

unsigned func_51 (unsigned p_53, unsigned p_55)
{
  return g_2;
}

int func_62 (unsigned p_63)
{
  p_63 = g_2 & g_67;
  if (g_2)
    {
    }
  else if (p_63)
    return 1;
  g_67 = bar (p_63, func_51 (g_67, 1));
  return 0;
}

int func_57 (unsigned p_58)
{
  return func_62 (1);
}

int func_48 (unsigned p_49, unsigned p_50)
{
  return func_57 (1);
}

unsigned func_1 (void)
{
  unsigned l_5 = 0;
  if (g_2)
    for (1; g_2 <= -16; g_2 = foo (g_2, 1))
      {
        for (1; g_162; g_162)
          func_48 (func_48 (g_2, 1), l_5);
        if (g_111)
          return 1;
      }
  return 0;
}

void crc32 (int);

void baz (void)
{
  func_1 ();
  crc32 (g_2);
}


-- 
           Summary: ice in find_or_generate_expression, at tree-ssa-
                    pre.c:2769
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: regehr at cs dot utah dot edu
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38926