Add the clang library to the repo (with some of my changes, too).

1 files changed, 169 insertions, 0 deletions

diff --git a/clang/test/SemaCXX/uninitialized.cpp b/clang/test/SemaCXX/uninitialized.cpp
new file mode 100644
index 0000000..7879e7c
--- /dev/null
+++ b/clang/test/SemaCXX/uninitialized.cpp
@@ -0,0 +1,169 @@
+// RUN: %clang_cc1 -fsyntax-only -Wall -Wuninitialized -std=c++11 -verify %s
+
+int foo(int x);
+int bar(int* x);
+int boo(int& x);
+int far(const int& x);
+
+// Test self-references within initializers which are guaranteed to be
+// uninitialized.
+int a = a; // no-warning: used to signal intended lack of initialization.
+int b = b + 1; // expected-warning {{variable 'b' is uninitialized when used within its own initialization}}
+int c = (c + c); // expected-warning 2 {{variable 'c' is uninitialized when used within its own initialization}}
+void test() {
+  int d = ({ d + d ;}); // expected-warning {{variable 'd' is uninitialized when used within its own initialization}}
+}
+int e = static_cast<long>(e) + 1; // expected-warning {{variable 'e' is uninitialized when used within its own initialization}}
+int f = foo(f); // expected-warning {{variable 'f' is uninitialized when used within its own initialization}}
+
+// Thes don't warn as they don't require the value.
+int g = sizeof(g);
+void* ptr = &ptr;
+int h = bar(&h);
+int i = boo(i);
+int j = far(j);
+int k = __alignof__(k);
+
+
+// Test self-references with record types.
+class A {
+  // Non-POD class.
+  public:
+    enum count { ONE, TWO, THREE };
+    int num;
+    static int count;
+    int get() const { return num; }
+    int get2() { return num; }
+    void set(int x) { num = x; }
+    static int zero() { return 0; }
+
+    A() {}
+    A(A const &a) {}
+    A(int x) {}
+    A(int *x) {}
+    A(A *a) {}
+    ~A();
+};
+
+A getA() { return A(); }
+A getA(int x) { return A(); }
+A getA(A* a) { return A(); }
+
+void setupA() {
+  A a1;
+  a1.set(a1.get());
+  A a2(a1.get());
+  A a3(a1);
+  A a4(&a4);
+  A a5(a5.zero());
+  A a6(a6.ONE);
+  A a7 = getA();
+  A a8 = getA(a8.TWO);
+  A a9 = getA(&a9);
+  A a10(a10.count);
+
+  A a11(a11);  // expected-warning {{variable 'a11' is uninitialized when used within its own initialization}}
+  A a12(a12.get());  // expected-warning {{variable 'a12' is uninitialized when used within its own initialization}}
+  A a13(a13.num);  // expected-warning {{variable 'a13' is uninitialized when used within its own initialization}}
+  A a14 = A(a14);  // expected-warning {{variable 'a14' is uninitialized when used within its own initialization}}
+  A a15 = getA(a15.num);  // expected-warning {{variable 'a15' is uninitialized when used within its own initialization}}
+  A a16(&a16.num);  // expected-warning {{variable 'a16' is uninitialized when used within its own initialization}}
+  A a17(a17.get2());  // expected-warning {{variable 'a17' is uninitialized when used within its own initialization}}
+}
+
+struct B {
+  // POD struct.
+  int x;
+  int *y;
+};
+
+B getB() { return B(); };
+B getB(int x) { return B(); };
+B getB(int *x) { return B(); };
+B getB(B *b) { return B(); };
+
+void setupB() {
+  B b1;
+  B b2(b1);
+  B b3 = { 5, &b3.x };
+  B b4 = getB();
+  B b5 = getB(&b5);
+  B b6 = getB(&b6.x);
+
+  // Silence unused warning
+  (void) b2;
+  (void) b4;
+
+  B b7(b7);  // expected-warning {{variable 'b7' is uninitialized when used within its own initialization}}
+  B b8 = getB(b8.x);  // expected-warning {{variable 'b8' is uninitialized when used within its own initialization}}
+  B b9 = getB(b9.y);  // expected-warning {{variable 'b9' is uninitialized when used within its own initialization}}
+}
+
+// Also test similar constructs in a field's initializer.
+struct S {
+  int x;
+  void *ptr;
+
+  S(bool (*)[1]) : x(x) {} // expected-warning {{field is uninitialized when used here}}
+  S(bool (*)[2]) : x(x + 1) {} // expected-warning {{field is uninitialized when used here}}
+  S(bool (*)[3]) : x(x + x) {} // expected-warning {{field is uninitialized when used here}}
+  S(bool (*)[4]) : x(static_cast<long>(x) + 1) {} // expected-warning {{field is uninitialized when used here}}
+  S(bool (*)[5]) : x(foo(x)) {} // FIXME: This should warn!
+
+  // These don't actually require the value of x and so shouldn't warn.
+  S(char (*)[1]) : x(sizeof(x)) {} // rdar://8610363
+  S(char (*)[2]) : ptr(&ptr) {}
+  S(char (*)[3]) : x(__alignof__(x)) {}
+  S(char (*)[4]) : x(bar(&x)) {}
+  S(char (*)[5]) : x(boo(x)) {}
+  S(char (*)[6]) : x(far(x)) {}
+};
+
+struct C { char a[100], *e; } car = { .e = car.a };
+
+// <rdar://problem/10398199>
+namespace rdar10398199 {
+  class FooBase { protected: ~FooBase() {} };
+  class Foo : public FooBase {
+  public:
+    operator int&() const;
+  };
+  void stuff();
+  template <typename T> class FooImpl : public Foo {
+    T val;
+  public:
+    FooImpl(const T &x) : val(x) {}
+    ~FooImpl() { stuff(); }
+  };
+
+  template <typename T> FooImpl<T> makeFoo(const T& x) {
+    return FooImpl<T>(x);
+  }
+
+  void test() {
+    const Foo &x = makeFoo(42);
+    const int&y = makeFoo(42u);
+    (void)x;
+    (void)y;
+  };
+}
+
+// PR 12325 - this was a false uninitialized value warning due to
+// a broken CFG.
+int pr12325(int params) {
+  int x = ({
+    while (false)
+      ;
+    int _v = params;
+    if (false)
+      ;
+    _v; // no-warning
+  });
+  return x;
+}
+
+// Test lambda expressions with -Wuninitialized
+int test_lambda() {
+  auto f1 = [] (int x, int y) { int z; return x + y + z; }; // expected-warning {{C++11 requires lambda with omitted result type to consist of a single return statement}} expected-warning{{variable 'z' is uninitialized when used here}} expected-note {{initialize the variable 'z' to silence this warning}}
+  return f1(1, 2);
+}