C++: Add buggy testcase with 'RemExpr'.

Author: MathiasVP

cpp/ql/test/library-tests/rangeanalysis/SimpleRangeAnalysis/lowerBound.expected

@@ -592,6 +592,8 @@
 | test.c:654:9:654:9 | i | -2147483648 |
 | test.c:658:7:658:7 | u | 0 |
 | test.c:659:9:659:9 | u | 0 |
+| test.c:664:12:664:12 | s | -2147483648 |
+| test.c:665:7:665:8 | s2 | -2147483648 |
 | test.cpp:10:7:10:7 | b | -2147483648 |
 | test.cpp:11:5:11:5 | x | -2147483648 |
 | test.cpp:13:10:13:10 | x | -2147483648 |

cpp/ql/test/library-tests/rangeanalysis/SimpleRangeAnalysis/test.c

@@ -659,3 +659,8 @@ void guard_bound_out_of_range(void) {
     out(u); // unreachable [BUG: is 0 .. +max]
   }
 }
+
+void test_mod(int s) {
+  int s2 = s % 5;
+  out(s2); // -4 .. 4 [BUG: is -max .. max]
+}

cpp/ql/test/library-tests/rangeanalysis/SimpleRangeAnalysis/upperBound.expected

@@ -592,6 +592,8 @@
 | test.c:654:9:654:9 | i | 2147483647 |
 | test.c:658:7:658:7 | u | 0 |
 | test.c:659:9:659:9 | u | 4294967295 |
+| test.c:664:12:664:12 | s | 2147483647 |
+| test.c:665:7:665:8 | s2 | 2147483647 |
 | test.cpp:10:7:10:7 | b | 2147483647 |
 | test.cpp:11:5:11:5 | x | 2147483647 |
 | test.cpp:13:10:13:10 | x | 2147483647 |