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From: "regehr at cs dot utah.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/53408] New: ICE in get_initial_def_for_induction, at tree-vect-loop.c:3222
Date: Fri, 18 May 2012 19:47:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53408

             Bug #: 53408
           Summary: ICE in get_initial_def_for_induction, at
                    tree-vect-loop.c:3222
    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 r48]$ current-gcc -v
Using built-in specs.
COLLECT_GCC=current-gcc
COLLECT_LTO_WRAPPER=/uusoc/exports/scratch/regehr/z/compiler-install/gcc-r187663-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-r187663-install
--program-prefix=r187663- --enable-languages=c,c++
Thread model: posix
gcc version 4.8.0 20120518 (experimental) (GCC) 
[regehr@dyson r48]$ current-gcc -c -O3 small.c
small.c: In function 'fn1':
small.c:3:1: internal compiler error: in get_initial_def_for_induction, at
tree-vect-loop.c:3222
 fn1 ()
 ^
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
[regehr@dyson r48]$ cat small.c 
int a, b, c, d, e;
void
fn1 ()
{
    int f, g;
    char h = 0;
    b = 0;
    for (; b < 32; b++)
    {
        g = h > e ? h : h << 1;
        f = g && a ? 0 : 1;
        h = 1;
        for (; h > 0; h = h + 1)
            c = 0 < h | f;
    }
    if (h)
        d = 0;
}