tests/bench-slope.c: workaround ICE failure on mips with '-O -g'

Hit a ICE and could reduce it to the following minimal example:

1. Only the size of array assigned with 2 caused the issue:
$ cat > mipgcc-test.c << END

int main (int argc, char **argv)
{
        char *pStrArry[ARRAY_SIZE_MAX] = {"hello"};
        int i = 0;

        while(pStrArry[i] && i<ARRAY_SIZE_MAX)
        {
                printf("%s\n", pStrArry[i]);
                i++;
        }

        return 0;
}

END

2. Only -O1 and -g on mips caused the issue:
$ mips-poky-linux-gcc -O1 -g -o mipgcc-test mipgcc-test.c
mipgcc-test.c: In function 'main':
mipgcc-test.c:18:1: internal compiler error: in dwarf2out_var_location, at dwarf2out.c:20810
 }
 ^
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions

3. The quick workround is trying to enlarge the size of array with larger
than 2.

4. File a bug to GNU, but it could not be reproduced on there environment.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60643

Upstream-Status: [oe specific]

Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
---
 tests/bench-slope.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tests/bench-slope.c b/tests/bench-slope.c
index bd05064..28c2438 100644
--- a/tests/bench-slope.c
+++ b/tests/bench-slope.c
@@ -1197,7 +1197,7 @@ static struct bench_ops hash_ops = {
 };
 
 
-static struct bench_hash_mode hash_modes[] = {
+static struct bench_hash_mode hash_modes[3] = {
   {"", &hash_ops},
   {0},
 };
@@ -1349,7 +1349,7 @@ static struct bench_ops mac_ops = {
 };
 
 
-static struct bench_mac_mode mac_modes[] = {
+static struct bench_mac_mode mac_modes[3] = {
   {"", &mac_ops},
   {0},
 };
-- 
1.8.1.2