[Bug c/53168] New: ICE in find_or_generate_expression, at tree-ssa-pre.c:3053

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

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53168

             Bug #: 53168
           Summary: ICE in find_or_generate_expression, at
                    tree-ssa-pre.c:3053
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: regehr@cs.utah.edu
                CC: chenyang@cs.utah.edu


[regehr@dyson r44]$ current-gcc -c -O2 small.c
small.c: In function 'fn3':
small.c:7:1: internal compiler error: in find_or_generate_expression, at
tree-ssa-pre.c:3053
 fn3 ()
 ^
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
[regehr@dyson r44]$ cat small.c
int a, b, c;
unsigned *d;
int e[1];
void fn1 ();
int fn2 ();
int
fn3 ()
{
    int *f = &a;
    if (fn2 ())
    {
        for (; c; c++)
        {
            e[a] && (b = 0);
            fn1 ();
            if (e[a])
                return 0;
        }
        for (; c <= 0; c++)
            for (;;)
                ;
    }
    else
        e[0] = 0 != (d = f);
    return *d;
}
[regehr@dyson r44]$ current-gcc -v
Using built-in specs.
COLLECT_GCC=current-gcc
COLLECT_LTO_WRAPPER=/uusoc/exports/scratch/regehr/z/compiler-install/gcc-r186954-install/bin/../libexec/gcc/x86_64-unknown-linux-gnu/4.8.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../configure --with-libelf=/usr/local --enable-lto
--prefix=/home/regehr/z/compiler-install/gcc-r186954-install
--program-prefix=r186954- --enable-languages=c,c++
Thread model: posix
gcc version 4.8.0 20120430 (experimental) (GCC)