add user defined new test cpp

Author: ashfordium

clang/test/Analysis/new-user-defined.cpp

@@ -0,0 +1,38 @@
+// RUN: %clang_analyze_cc1 -w -verify %s\
+// RUN:   -analyzer-checker=core\
+// RUN:   -analyzer-checker=debug.ExprInspection -std=c++17
+// RUN: %clang_analyze_cc1 -w -verify %s\
+// RUN:   -analyzer-checker=core\
+// RUN:   -analyzer-checker=debug.ExprInspection -std=c++11\
+// RUN:   -DTEST_INLINABLE_ALLOCATORS
+// RUN: %clang_analyze_cc1 -w -verify %s\
+// RUN:   -analyzer-checker=core,\
+// RUN:   -analyzer-checker=debug.ExprInspection -std=c++17\
+// RUN:   -DTEST_INLINABLE_ALLOCATORS
+
+void clang_analyzer_eval(bool);
+
+typedef __typeof(sizeof(int)) size_t;
+
+namespace CustomClassType {
+struct S {
+  int x;
+  static void* operator new(size_t size) {
+    return ::operator new(size);
+  }
+};
+void F() {
+  S *s = new S;
+  clang_analyzer_eval(s->x); // expected-warning{{UNKNOWN}} FIXME: should be an undefined warning
+
+  S *s2 = new S{};
+  clang_analyzer_eval(0 == s2->x); // expected-warning{{TRUE}}
+
+  S *s3 = new S{1};
+  clang_analyzer_eval(1 == s3->x); // expected-warning{{TRUE}}
+}
+
+struct WithPlacementNew {
+};
+
+} // namespace CustomClassType