1 files changed, 176 insertions, 0 deletions
diff --git a/test/Analysis/array-struct-region.cpp b/test/Analysis/array-struct-region.cpp
new file mode 100644
index 0000000000000..12ae5d3eba6ec
--- /dev/null
+++ b/test/Analysis/array-struct-region.cpp
@@ -0,0 +1,176 @@
+// RUN: %clang_cc1 -analyze -analyzer-checker=core,alpha.core,debug.ExprInspection -verify -x c %s
+// RUN: %clang_cc1 -analyze -analyzer-checker=core,alpha.core,debug.ExprInspection -verify -x c++ -analyzer-config c++-inlining=constructors %s
+// RUN: %clang_cc1 -analyze -analyzer-checker=core,alpha.core,debug.ExprInspection -DINLINE -verify -x c %s
+// RUN: %clang_cc1 -analyze -analyzer-checker=core,alpha.core,debug.ExprInspection -DINLINE -verify -x c++ -analyzer-config c++-inlining=constructors %s
+
+void clang_analyzer_eval(int);
+
+struct S {
+  int field;
+
+#if __cplusplus
+  const struct S *getThis() const { return this; }
+  const struct S *operator +() const { return this; }
+
+  bool check() const { return this == this; }
+  bool operator !() const { return this != this; }
+
+  int operator *() const { return field; }
+#endif
+};
+
+#if __cplusplus
+const struct S *operator -(const struct S &s) { return &s; }
+bool operator ~(const struct S &s) { return &s != &s; }
+#endif
+
+
+#ifdef INLINE
+struct S getS() {
+  struct S s = { 42 };
+  return s;
+}
+#else
+struct S getS();
+#endif
+
+
+void testAssignment() {
+  struct S s = getS();
+
+  if (s.field != 42) return;
+  clang_analyzer_eval(s.field == 42); // expected-warning{{TRUE}}
+
+  s.field = 0;
+  clang_analyzer_eval(s.field == 0); // expected-warning{{TRUE}}
+
+#if __cplusplus
+  clang_analyzer_eval(s.getThis() == &s); // expected-warning{{TRUE}}
+  clang_analyzer_eval(+s == &s); // expected-warning{{TRUE}}
+  clang_analyzer_eval(-s == &s); // expected-warning{{TRUE}}
+
+  clang_analyzer_eval(s.check()); // expected-warning{{TRUE}}
+  clang_analyzer_eval(!s); // expected-warning{{FALSE}}
+  clang_analyzer_eval(~s); // expected-warning{{FALSE}}
+
+  clang_analyzer_eval(*s == 0); // expected-warning{{TRUE}}
+#endif
+}
+
+
+void testImmediateUse() {
+  int x = getS().field;
+
+  if (x != 42) return;
+  clang_analyzer_eval(x == 42); // expected-warning{{TRUE}}
+
+#if __cplusplus
+  clang_analyzer_eval((void *)getS().getThis() == (void *)&x); // expected-warning{{FALSE}}
+  clang_analyzer_eval((void *)+getS() == (void *)&x); // expected-warning{{FALSE}}
+  clang_analyzer_eval((void *)-getS() == (void *)&x); // expected-warning{{FALSE}}
+
+  clang_analyzer_eval(getS().check()); // expected-warning{{TRUE}}
+  clang_analyzer_eval(!getS()); // expected-warning{{FALSE}}
+  clang_analyzer_eval(~getS()); // expected-warning{{FALSE}}
+#endif
+}
+
+int getConstrainedField(struct S s) {
+  if (s.field != 42) return 42;
+  return s.field;
+}
+
+int getAssignedField(struct S s) {
+  s.field = 42;
+  return s.field;
+}
+
+void testArgument() {
+  clang_analyzer_eval(getConstrainedField(getS()) == 42); // expected-warning{{TRUE}}
+  clang_analyzer_eval(getAssignedField(getS()) == 42); // expected-warning{{TRUE}}
+}
+
+void testImmediateUseParens() {
+  int x = ((getS())).field;
+
+  if (x != 42) return;
+  clang_analyzer_eval(x == 42); // expected-warning{{TRUE}}
+
+  clang_analyzer_eval(getConstrainedField(((getS()))) == 42); // expected-warning{{TRUE}}
+  clang_analyzer_eval(getAssignedField(((getS()))) == 42); // expected-warning{{TRUE}}
+
+#if __cplusplus
+  clang_analyzer_eval(((getS())).check()); // expected-warning{{TRUE}}
+  clang_analyzer_eval(!((getS()))); // expected-warning{{FALSE}}
+  clang_analyzer_eval(~((getS()))); // expected-warning{{FALSE}}
+#endif
+}
+
+
+//--------------------
+// C++-only tests
+//--------------------
+
+#if __cplusplus
+void testReferenceAssignment() {
+  const S &s = getS();
+
+  if (s.field != 42) return;
+  clang_analyzer_eval(s.field == 42); // expected-warning{{TRUE}}
+
+  clang_analyzer_eval(s.getThis() == &s); // expected-warning{{TRUE}}
+  clang_analyzer_eval(+s == &s); // expected-warning{{TRUE}}
+
+  clang_analyzer_eval(s.check()); // expected-warning{{TRUE}}
+  clang_analyzer_eval(!s); // expected-warning{{FALSE}}
+  clang_analyzer_eval(~s); // expected-warning{{FALSE}}
+
+  clang_analyzer_eval(*s == 42); // expected-warning{{TRUE}}
+}
+
+
+int getConstrainedFieldRef(const S &s) {
+  if (s.field != 42) return 42;
+  return s.field;
+}
+
+bool checkThis(const S &s) {
+  return s.getThis() == &s;
+}
+
+bool checkThisOp(const S &s) {
+  return +s == &s;
+}
+
+bool checkThisStaticOp(const S &s) {
+  return -s == &s;
+}
+
+void testReferenceArgument() {
+  clang_analyzer_eval(getConstrainedFieldRef(getS()) == 42); // expected-warning{{TRUE}}
+  clang_analyzer_eval(checkThis(getS())); // expected-warning{{TRUE}}
+  clang_analyzer_eval(checkThisOp(getS())); // expected-warning{{TRUE}}
+  clang_analyzer_eval(checkThisStaticOp(getS())); // expected-warning{{TRUE}}
+}
+
+
+int getConstrainedFieldOp(S s) {
+  if (*s != 42) return 42;
+  return *s;
+}
+
+int getConstrainedFieldRefOp(const S &s) {
+  if (*s != 42) return 42;
+  return *s;
+}
+
+void testImmediateUseOp() {
+  int x = *getS();
+  if (x != 42) return;
+  clang_analyzer_eval(x == 42); // expected-warning{{TRUE}}
+
+  clang_analyzer_eval(getConstrainedFieldOp(getS()) == 42); // expected-warning{{TRUE}}
+  clang_analyzer_eval(getConstrainedFieldRefOp(getS()) == 42); // expected-warning{{TRUE}}
+}
+
+#endif