[Bug c/62073] New: Segmentation fault with tree vectorize

[fei.yang0953 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62073

            Bug ID: 62073
           Summary: Segmentation fault with tree vectorize
           Product: gcc
           Version: 4.10.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: fei.yang0953 at gmail dot com

1. Testcase generated by Csmith:

struct S0
{
    int f7;
};
struct S0 g_50;
int g_70;
int g_76;

int foo (long long p_56, int * p_57)
{
    int *l_77;
    int l_101;

    for (; g_70;)
    {
        int **l_78 = &l_77;
        if (g_50.f7)
            continue;
        *l_78 = 0;
    }
    for (g_76 = 1; g_76 >= 0; g_76--)
    {
        int *l_90;
        for (l_101 = 4; l_101 >= 0; l_101--)
            if (l_101)
                *l_90 = 0;
            else
            {
                int **l_113 = &l_77;
                *l_113 = p_57;
            }
    }

    return *l_77;
}

2. Compile option and result:
supertux@localhost:~/test> ~/gcc-devel/install/bin/gcc -O1 foo.c -S
-ftree-vectorize
foo.c: In function ‘foo’:
foo.c:10:5: internal compiler error: Segmentation fault
 int foo (long long p_56, int * p_57)
     ^
0xbeaed9 crash_signal
    ../../trunk/gcc/toplev.c:337
0x773af6 flow_bb_inside_loop_p(loop const*, basic_block_def const*)
    ../../trunk/gcc/cfgloop.c:789
0xe40de0 vect_is_simple_reduction_1
    ../../trunk/gcc/tree-vect-loop.c:2324
0xe41bc6 vect_force_simple_reduction(_loop_vec_info*, gimple_statement_base*,
bool, bool*)
    ../../trunk/gcc/tree-vect-loop.c:2617
0xe45eee vect_analyze_scalar_cycles_1
    ../../trunk/gcc/tree-vect-loop.c:710
0xe4607c vect_analyze_scalar_cycles
    ../../trunk/gcc/tree-vect-loop.c:784
0xe475db vect_analyze_loop_2
    ../../trunk/gcc/tree-vect-loop.c:1665
0xe47b92 vect_analyze_loop(loop*)
    ../../trunk/gcc/tree-vect-loop.c:1864
0xe5b742 vectorize_loops()
    ../../trunk/gcc/tree-vectorizer.c:432
0xd687b0 execute
    ../../trunk/gcc/tree-ssa-loop.c:232
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.

3. GCC version:
supertux@localhost:~/test> ~/gcc-devel/install/bin/gcc -v
Using built-in specs.
COLLECT_GCC=/home/supertux/gcc-devel/install/bin/gcc
COLLECT_LTO_WRAPPER=/home/supertux/gcc-devel/install/libexec/gcc/x86_64-suse-linux/4.10.0/lto-wrapper
Target: x86_64-suse-linux
Configured with: ../trunk/configure --build=x86_64-suse-linux
--prefix=/home/supertux/gcc-devel/install --enable-languages=c
--enable-checking --disable-libmudflap --disable-libssp --with-cpu=generic
--disable-bootstrap
Thread model: posix
gcc version 4.10.0 20140809 (experimental) (GCC)