[Bug c/51245] New: ICE in vn_reference_insert_pieces, at tree-ssa-sccvn.c:1983

["regehr at cs dot utah.edu" <gcc-bugzilla@gcc.gnu.org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51245

             Bug #: 51245
           Summary: ICE in vn_reference_insert_pieces, at
                    tree-ssa-sccvn.c:1983
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: regehr@cs.utah.edu


[regehr@gamow tmp065]$ current-gcc -v

Using built-in specs.
COLLECT_GCC=current-gcc
COLLECT_LTO_WRAPPER=/uusoc/exports/scratch/regehr/z/compiler-install/gcc-r181530-install/bin/../libexec/gcc/x86_64-unknown-linux-gnu/4.7.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../configure --with-libelf=/usr/local --enable-lto
--prefix=/home/regehr/z/compiler-install/gcc-r181530-install
--program-prefix=r181530- --enable-languages=c,c++
Thread model: posix
gcc version 4.7.0 20111120 (experimental) (GCC) 

[regehr@gamow tmp065]$ current-gcc -Ofast -c -w small.c

small.c: In function 'func_1':
small.c:11:1: internal compiler error: in vn_reference_insert_pieces, at
tree-ssa-sccvn.c:1983
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

[regehr@gamow tmp065]$ cat small.c 


struct S0
{
  int f4;
};
struct S0 g_122;
struct S0 *g_140;
struct S0 **g_348;
unsigned func_10 (int, int, char);
int func_75;
struct S0
func_1 ()
{
  struct S0 l_444 = {
  };
  if (func_10 (0, 0, 0))
    {
      struct S0 *l_463 = &g_122;
      for (;;)
    {
      *g_140 = l_444;
      *l_463 = *g_140;
      if (g_122.f4)
        break;
    }
    }
  return **g_348;
}

unsigned
func_10 (int p_11, int p_12, char p_13)
{
  if (func_75)
    **g_348 = *g_140;
  return 1;
}