[Bug c/52914] New: ICE in simplify_const_unary_operation, at simplify-rtx.c:1464

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

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52914

             Bug #: 52914
           Summary: ICE in simplify_const_unary_operation, at
                    simplify-rtx.c:1464
    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 r13]$ current-gcc -O1 -c small.c
small.c: In function 'fn3':
small.c:16:1: internal compiler error: in simplify_const_unary_operation, at
simplify-rtx.c:1464
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.


[regehr@dyson r13]$ cat small.c
int a, b, c, f, g, h, i;
unsigned d;
int e[0];
int
fn1 ()
{
    return 0;
}

static char fn2 ();
void
fn3 ()
{
    for (; c; c += 1)
        fn2 ();
}

char
fn2 ()
{
    int j = -3L;
    d = 0;
    for (;; d = 1)
    {
        if (e[d])
            g = fn1 ();
        i = (b ^ 1) < 0 ? b : h;
        i || (a = 1) ? 0 : 0;
        if (0 >= f <= j)
            ;
        else
            return 0;
    }
}


[regehr@dyson r13]$ current-gcc -v
Using built-in specs.
COLLECT_GCC=current-gcc
COLLECT_LTO_WRAPPER=/uusoc/exports/scratch/regehr/z/compiler-install/gcc-r186233-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-r186233-install
--program-prefix=r186233- --enable-languages=c,c++
Thread model: posix
gcc version 4.8.0 20120409 (experimental) (GCC)