Fix copy&paste error: check_long_long should check __builtin_ssubll_overflow

The constants are of the right type, but __builtin_ssubl_overflow was
used instead of __builtin_ssubll_overflow (which, however, made no
difference on 64-bit Linux platforms, which most of our tests run on).

Author: tautschnig

regression/cbmc/gcc_builtin_sub_overflow/main.c

@@ -26,10 +26,10 @@ void check_long(void)
 void check_long_long(void)
 {
   long result;
-  assert(!__builtin_ssubl_overflow(1ll, 1ll, &result));
+  assert(!__builtin_ssubll_overflow(1ll, 1ll, &result));
   assert(result == 0ll);
-  assert(__builtin_ssubl_overflow(LLONG_MIN, 1ll, &result));
-  assert(!__builtin_ssubl_overflow(LLONG_MIN / 2ll, LLONG_MAX / 2ll, &result));
+  assert(__builtin_ssubll_overflow(LLONG_MIN, 1ll, &result));
+  assert(!__builtin_ssubll_overflow(LLONG_MIN / 2ll, LLONG_MAX / 2ll, &result));
   assert(result - 1ll == LLONG_MIN);
   assert(0 && "reachability");
 }

regression/cbmc/gcc_builtin_sub_overflow/test.desc

@@ -13,10 +13,10 @@ main.c
 \[check_long.assertion.4\] line \d+ assertion !__builtin_ssubl_overflow\(.* / 2l, .* / 2l, &result\): SUCCESS
 \[check_long.assertion.5\] line \d+ assertion result - 1l == .*: SUCCESS
 \[check_long.assertion.6\] line \d+ assertion 0 && "reachability": FAILURE
-\[check_long_long.assertion.1\] line \d+ assertion !__builtin_ssubl_overflow\(1ll, 1ll, &result\): SUCCESS
+\[check_long_long.assertion.1\] line \d+ assertion !__builtin_ssubll_overflow\(1ll, 1ll, &result\): SUCCESS
 \[check_long_long.assertion.2\] line \d+ assertion result == 0ll: SUCCESS
-\[check_long_long.assertion.3\] line \d+ assertion __builtin_ssubl_overflow\(.*, 1ll, &result\): SUCCESS
-\[check_long_long.assertion.4\] line \d+ assertion !__builtin_ssubl_overflow\(.* / 2ll, .* / 2ll, &result\): SUCCESS
+\[check_long_long.assertion.3\] line \d+ assertion __builtin_ssubll_overflow\(.*, 1ll, &result\): SUCCESS
+\[check_long_long.assertion.4\] line \d+ assertion !__builtin_ssubll_overflow\(.* / 2ll, .* / 2ll, &result\): SUCCESS
 \[check_long_long.assertion.5\] line \d+ assertion result - 1ll == .*: SUCCESS
 \[check_long_long.assertion.6\] line \d+ assertion 0 && "reachability": FAILURE
 \[check_unsigned.assertion.1\] line \d+ assertion !__builtin_usub_overflow\(1u, 1u, &result\): SUCCESS