Vendor import of clang trunk r338150:vendor/clang/clang-trunk-r338150

https://llvm.org/svn/llvm-project/cfe/trunk@338150

1 files changed, 98 insertions, 0 deletions

diff --git a/test/Analysis/constraint_manager_negate_difference.c b/test/Analysis/constraint_manager_negate_difference.c
new file mode 100644
index 000000000000..2236c1693b90
--- /dev/null
+++ b/test/Analysis/constraint_manager_negate_difference.c
@@ -0,0 +1,98 @@
+// RUN: %clang_analyze_cc1 -analyzer-checker=debug.ExprInspection,core.builtin -analyzer-config aggressive-binary-operation-simplification=true -verify %s
+
+void clang_analyzer_eval(int);
+
+void exit(int);
+
+#define UINT_MAX (~0U)
+#define INT_MAX (UINT_MAX & (UINT_MAX >> 1))
+#define INT_MIN (UINT_MAX & ~(UINT_MAX >> 1))
+
+extern void __assert_fail (__const char *__assertion, __const char *__file,
+    unsigned int __line, __const char *__function)
+     __attribute__ ((__noreturn__));
+#define assert(expr) \
+  ((expr)  ? (void)(0)  : __assert_fail (#expr, __FILE__, __LINE__, __func__))
+
+void assert_in_range(int x) {
+  assert(x <= ((int)INT_MAX / 4));
+  assert(x >= -(((int)INT_MAX) / 4));
+}
+
+void assert_in_wide_range(int x) {
+  assert(x <= ((int)INT_MAX / 2));
+  assert(x >= -(((int)INT_MAX) / 2));
+}
+
+void assert_in_range_2(int m, int n) {
+  assert_in_range(m);
+  assert_in_range(n);
+}
+
+void equal(int m, int n) {
+  assert_in_range_2(m, n);
+  if (m != n)
+    return;
+  assert_in_wide_range(m - n);
+  clang_analyzer_eval(n == m); // expected-warning{{TRUE}}
+}
+
+void non_equal(int m, int n) {
+  assert_in_range_2(m, n);
+  if (m == n)
+    return;
+  assert_in_wide_range(m - n);
+  clang_analyzer_eval(n != m); // expected-warning{{TRUE}}
+}
+
+void less_or_equal(int m, int n) {
+  assert_in_range_2(m, n);
+  if (m < n)
+    return;
+  assert_in_wide_range(m - n);
+  clang_analyzer_eval(n <= m); // expected-warning{{TRUE}}
+}
+
+void less(int m, int n) {
+  assert_in_range_2(m, n);
+  if (m <= n)
+    return;
+  assert_in_wide_range(m - n);
+  clang_analyzer_eval(n < m); // expected-warning{{TRUE}}
+}
+
+void greater_or_equal(int m, int n) {
+  assert_in_range_2(m, n);
+  if (m > n)
+    return;
+  assert_in_wide_range(m - n);
+  clang_analyzer_eval(n >= m); // expected-warning{{TRUE}}
+}
+
+void greater(int m, int n) {
+  assert_in_range_2(m, n);
+  if (m >= n)
+    return;
+  assert_in_wide_range(m - n);
+  clang_analyzer_eval(n > m); // expected-warning{{TRUE}}
+}
+
+void negate_positive_range(int m, int n) {
+  if (m - n <= 0)
+    return;
+  clang_analyzer_eval(n - m < 0); // expected-warning{{TRUE}}
+  clang_analyzer_eval(n - m > INT_MIN); // expected-warning{{TRUE}}
+  clang_analyzer_eval(n - m == INT_MIN); // expected-warning{{FALSE}}
+}
+
+void negate_int_min(int m, int n) {
+  if (m - n != INT_MIN)
+    return;
+  clang_analyzer_eval(n - m == INT_MIN); // expected-warning{{TRUE}}
+}
+
+void negate_mixed(int m, int n) {
+  if (m -n > INT_MIN && m - n <= 0)
+    return;
+  clang_analyzer_eval(n - m <= 0); // expected-warning{{TRUE}}
+}