1 // RUN: %clang_cc1 -fsyntax-only -Wall -Wuninitialized -Wno-unused-value -std=c++11 -verify %s
2
3 // definitions for std::move
4 namespace std {
5 inline namespace foo {
6 template <class T> struct remove_reference { typedef T type; };
7 template <class T> struct remove_reference<T&> { typedef T type; };
8 template <class T> struct remove_reference<T&&> { typedef T type; };
9
10 template <class T> typename remove_reference<T>::type&& move(T&& t);
11 }
12 }
13
14 int foo(int x);
15 int bar(int* x);
16 int boo(int& x);
17 int far(const int& x);
18 int moved(int&& x);
19 int &ref(int x);
20
21 // Test self-references within initializers which are guaranteed to be
22 // uninitialized.
23 int a = a; // no-warning: used to signal intended lack of initialization.
24 int b = b + 1; // expected-warning {{variable 'b' is uninitialized when used within its own initialization}}
25 int c = (c + c); // expected-warning 2 {{variable 'c' is uninitialized when used within its own initialization}}
26 int e = static_cast<long>(e) + 1; // expected-warning {{variable 'e' is uninitialized when used within its own initialization}}
27 int f = foo(f); // expected-warning {{variable 'f' is uninitialized when used within its own initialization}}
28
29 // Thes don't warn as they don't require the value.
30 int g = sizeof(g);
31 void* ptr = &ptr;
32 int h = bar(&h);
33 int i = boo(i);
34 int j = far(j);
35 int k = __alignof__(k);
36
37 int l = k ? l : l; // expected-warning 2{{variable 'l' is uninitialized when used within its own initialization}}
38 int m = 1 + (k ? m : m); // expected-warning 2{{variable 'm' is uninitialized when used within its own initialization}}
39 int n = -n; // expected-warning {{variable 'n' is uninitialized when used within its own initialization}}
40 int o = std::move(o); // expected-warning {{variable 'o' is uninitialized when used within its own initialization}}
41 const int p = std::move(p); // expected-warning {{variable 'p' is uninitialized when used within its own initialization}}
42 int q = moved(std::move(q)); // expected-warning {{variable 'q' is uninitialized when used within its own initialization}}
43 int r = std::move((p ? q : (18, r))); // expected-warning {{variable 'r' is uninitialized when used within its own initialization}}
44 int s = r ?: s; // expected-warning {{variable 's' is uninitialized when used within its own initialization}}
45 int t = t ?: s; // expected-warning {{variable 't' is uninitialized when used within its own initialization}}
46 int u = (foo(u), s); // expected-warning {{variable 'u' is uninitialized when used within its own initialization}}
47 int v = (u += v); // expected-warning {{variable 'v' is uninitialized when used within its own initialization}}
48 int w = (w += 10); // expected-warning {{variable 'w' is uninitialized when used within its own initialization}}
49 int x = x++; // expected-warning {{variable 'x' is uninitialized when used within its own initialization}}
50 int y = ((s ? (y, v) : (77, y))++, sizeof(y)); // expected-warning {{variable 'y' is uninitialized when used within its own initialization}}
51 int z = ++ref(z); // expected-warning {{variable 'z' is uninitialized when used within its own initialization}}
52 int aa = (ref(aa) += 10); // expected-warning {{variable 'aa' is uninitialized when used within its own initialization}}
53 int bb = bb ? x : y; // expected-warning {{variable 'bb' is uninitialized when used within its own initialization}}
54
test_stuff()55 void test_stuff () {
56 int a = a; // no-warning: used to signal intended lack of initialization.
57 int b = b + 1; // expected-warning {{variable 'b' is uninitialized when used within its own initialization}}
58 int c = (c + c); // expected-warning {{variable 'c' is uninitialized when used within its own initialization}}
59 int d = ({ d + d ;}); // expected-warning {{variable 'd' is uninitialized when used within its own initialization}}
60 int e = static_cast<long>(e) + 1; // expected-warning {{variable 'e' is uninitialized when used within its own initialization}}
61 int f = foo(f); // expected-warning {{variable 'f' is uninitialized when used within its own initialization}}
62
63 // Thes don't warn as they don't require the value.
64 int g = sizeof(g);
65 void* ptr = &ptr;
66 int h = bar(&h);
67 int i = boo(i);
68 int j = far(j);
69 int k = __alignof__(k);
70
71 int l = k ? l : l; // expected-warning {{variable 'l' is uninitialized when used within its own initialization}}
72 int m = 1 + (k ? m : m); // expected-warning {{'m' is uninitialized when used within its own initialization}}
73 int n = -n; // expected-warning {{variable 'n' is uninitialized when used within its own initialization}}
74 int o = std::move(o); // expected-warning {{variable 'o' is uninitialized when used within its own initialization}}
75 const int p = std::move(p); // expected-warning {{variable 'p' is uninitialized when used within its own initialization}}
76 int q = moved(std::move(q)); // expected-warning {{variable 'q' is uninitialized when used within its own initialization}}
77 int r = std::move((p ? q : (18, r))); // expected-warning {{variable 'r' is uninitialized when used within its own initialization}}
78 int s = r ?: s; // expected-warning {{variable 's' is uninitialized when used within its own initialization}}
79 int t = t ?: s; // expected-warning {{variable 't' is uninitialized when used within its own initialization}}
80 int u = (foo(u), s); // expected-warning {{variable 'u' is uninitialized when used within its own initialization}}
81 int v = (u += v); // expected-warning {{variable 'v' is uninitialized when used within its own initialization}}
82 int w = (w += 10); // expected-warning {{variable 'w' is uninitialized when used within its own initialization}}
83 int x = x++; // expected-warning {{variable 'x' is uninitialized when used within its own initialization}}
84 int y = ((s ? (y, v) : (77, y))++, sizeof(y)); // expected-warning {{variable 'y' is uninitialized when used within its own initialization}}
85 int z = ++ref(z); // expected-warning {{variable 'z' is uninitialized when used within its own initialization}}
86 int aa = (ref(aa) += 10); // expected-warning {{variable 'aa' is uninitialized when used within its own initialization}}
87 int bb = bb ? x : y; // expected-warning {{variable 'bb' is uninitialized when used within its own initialization}}
88
89 for (;;) {
90 int a = a; // no-warning: used to signal intended lack of initialization.
91 int b = b + 1; // expected-warning {{variable 'b' is uninitialized when used within its own initialization}}
92 int c = (c + c); // expected-warning {{variable 'c' is uninitialized when used within its own initialization}}
93 int d = ({ d + d ;}); // expected-warning {{variable 'd' is uninitialized when used within its own initialization}}
94 int e = static_cast<long>(e) + 1; // expected-warning {{variable 'e' is uninitialized when used within its own initialization}}
95 int f = foo(f); // expected-warning {{variable 'f' is uninitialized when used within its own initialization}}
96
97 // Thes don't warn as they don't require the value.
98 int g = sizeof(g);
99 void* ptr = &ptr;
100 int h = bar(&h);
101 int i = boo(i);
102 int j = far(j);
103 int k = __alignof__(k);
104
105 int l = k ? l : l; // expected-warning {{variable 'l' is uninitialized when used within its own initialization}}
106 int m = 1 + (k ? m : m); // expected-warning {{'m' is uninitialized when used within its own initialization}}
107 int n = -n; // expected-warning {{variable 'n' is uninitialized when used within its own initialization}}
108 int o = std::move(o); // expected-warning {{variable 'o' is uninitialized when used within its own initialization}}
109 const int p = std::move(p); // expected-warning {{variable 'p' is uninitialized when used within its own initialization}}
110 int q = moved(std::move(q)); // expected-warning {{variable 'q' is uninitialized when used within its own initialization}}
111 int r = std::move((p ? q : (18, r))); // expected-warning {{variable 'r' is uninitialized when used within its own initialization}}
112 int s = r ?: s; // expected-warning {{variable 's' is uninitialized when used within its own initialization}}
113 int t = t ?: s; // expected-warning {{variable 't' is uninitialized when used within its own initialization}}
114 int u = (foo(u), s); // expected-warning {{variable 'u' is uninitialized when used within its own initialization}}
115 int v = (u += v); // expected-warning {{variable 'v' is uninitialized when used within its own initialization}}
116 int w = (w += 10); // expected-warning {{variable 'w' is uninitialized when used within its own initialization}}
117 int x = x++; // expected-warning {{variable 'x' is uninitialized when used within its own initialization}}
118 int y = ((s ? (y, v) : (77, y))++, sizeof(y)); // expected-warning {{variable 'y' is uninitialized when used within its own initialization}}
119 int z = ++ref(z); // expected-warning {{variable 'z' is uninitialized when used within its own initialization}}
120 int aa = (ref(aa) += 10); // expected-warning {{variable 'aa' is uninitialized when used within its own initialization}}
121 int bb = bb ? x : y; // expected-warning {{variable 'bb' is uninitialized when used within its own initialization}}
122
123 }
124 }
125
test_comma()126 void test_comma() {
127 int a; // expected-note {{initialize the variable 'a' to silence this warning}}
128 int b = (a, a ?: 2); // expected-warning {{variable 'a' is uninitialized when used here}}
129 int c = (a, a, b, c); // expected-warning {{variable 'c' is uninitialized when used within its own initialization}}
130 int d; // expected-note {{initialize the variable 'd' to silence this warning}}
131 int e = (foo(d), e, b); // expected-warning {{variable 'd' is uninitialized when used here}}
132 int f; // expected-note {{initialize the variable 'f' to silence this warning}}
133 f = f + 1, 2; // expected-warning {{variable 'f' is uninitialized when used here}}
134 int h;
135 int g = (h, g, 2); // no-warning: h, g are evaluated but not used.
136 }
137
138 namespace member_ptr {
139 struct A {
140 int x;
141 int y;
Amember_ptr::A142 A(int x) : x{x} {}
143 };
144
test_member_ptr()145 void test_member_ptr() {
146 int A::* px = &A::x;
147 A a{a.*px}; // expected-warning {{variable 'a' is uninitialized when used within its own initialization}}
148 A b = b; // expected-warning {{variable 'b' is uninitialized when used within its own initialization}}
149 }
150 }
151
152 namespace const_ptr {
153 void foo(int *a);
154 void bar(const int *a);
155 void foobar(const int **a);
156
test_const_ptr()157 void test_const_ptr() {
158 int a;
159 int b; // expected-note {{initialize the variable 'b' to silence this warning}}
160 foo(&a);
161 bar(&b);
162 b = a + b; // expected-warning {{variable 'b' is uninitialized when used here}}
163 int *ptr; //expected-note {{initialize the variable 'ptr' to silence this warning}}
164 const int *ptr2;
165 foo(ptr); // expected-warning {{variable 'ptr' is uninitialized when used here}}
166 foobar(&ptr2);
167 }
168 }
169
170 // Also test similar constructs in a field's initializer.
171 struct S {
172 int x;
173 int y;
174 const int z = 5;
175 void *ptr;
176
SS177 S(bool (*)[1]) : x(x) {} // expected-warning {{field 'x' is uninitialized when used here}}
SS178 S(bool (*)[2]) : x(x + 1) {} // expected-warning {{field 'x' is uninitialized when used here}}
SS179 S(bool (*)[3]) : x(x + x) {} // expected-warning 2{{field 'x' is uninitialized when used here}}
SS180 S(bool (*)[4]) : x(static_cast<long>(x) + 1) {} // expected-warning {{field 'x' is uninitialized when used here}}
SS181 S(bool (*)[5]) : x(foo(x)) {} // expected-warning {{field 'x' is uninitialized when used here}}
182
183 // These don't actually require the value of x and so shouldn't warn.
SS184 S(char (*)[1]) : x(sizeof(x)) {} // rdar://8610363
SS185 S(char (*)[2]) : ptr(&ptr) {}
SS186 S(char (*)[3]) : x(bar(&x)) {}
SS187 S(char (*)[4]) : x(boo(x)) {}
SS188 S(char (*)[5]) : x(far(x)) {}
SS189 S(char (*)[6]) : x(__alignof__(x)) {}
190
SS191 S(int (*)[1]) : x(0), y(x ? y : y) {} // expected-warning 2{{field 'y' is uninitialized when used here}}
SS192 S(int (*)[2]) : x(0), y(1 + (x ? y : y)) {} // expected-warning 2{{field 'y' is uninitialized when used here}}
SS193 S(int (*)[3]) : x(-x) {} // expected-warning {{field 'x' is uninitialized when used here}}
SS194 S(int (*)[4]) : x(std::move(x)) {} // expected-warning {{field 'x' is uninitialized when used here}}
SS195 S(int (*)[5]) : z(std::move(z)) {} // expected-warning {{field 'z' is uninitialized when used here}}
SS196 S(int (*)[6]) : x(moved(std::move(x))) {} // expected-warning {{field 'x' is uninitialized when used here}}
SS197 S(int (*)[7]) : x(0), y(std::move((x ? x : (18, y)))) {} // expected-warning {{field 'y' is uninitialized when used here}}
SS198 S(int (*)[8]) : x(0), y(x ?: y) {} // expected-warning {{field 'y' is uninitialized when used here}}
SS199 S(int (*)[9]) : x(0), y(y ?: x) {} // expected-warning {{field 'y' is uninitialized when used here}}
SS200 S(int (*)[10]) : x(0), y((foo(y), x)) {} // expected-warning {{field 'y' is uninitialized when used here}}
SS201 S(int (*)[11]) : x(0), y(x += y) {} // expected-warning {{field 'y' is uninitialized when used here}}
SS202 S(int (*)[12]) : x(x += 10) {} // expected-warning {{field 'x' is uninitialized when used here}}
SS203 S(int (*)[13]) : x(x++) {} // expected-warning {{field 'x' is uninitialized when used here}}
SS204 S(int (*)[14]) : x(0), y(((x ? (y, x) : (77, y))++, sizeof(y))) {} // expected-warning {{field 'y' is uninitialized when used here}}
SS205 S(int (*)[15]) : x(++ref(x)) {} // expected-warning {{field 'x' is uninitialized when used here}}
SS206 S(int (*)[16]) : x((ref(x) += 10)) {} // expected-warning {{field 'x' is uninitialized when used here}}
SS207 S(int (*)[17]) : x(0), y(y ? x : x) {} // expected-warning {{field 'y' is uninitialized when used here}}
208 };
209
210 // Test self-references with record types.
211 class A {
212 // Non-POD class.
213 public:
214 enum count { ONE, TWO, THREE };
215 int num;
216 static int count;
get() const217 int get() const { return num; }
get2()218 int get2() { return num; }
set(int x)219 int set(int x) { num = x; return num; }
zero()220 static int zero() { return 0; }
221
A()222 A() {}
A(A const & a)223 A(A const &a) {}
A(int x)224 A(int x) {}
A(int * x)225 A(int *x) {}
A(A * a)226 A(A *a) {}
A(A && a)227 A(A &&a) {}
228 ~A();
229 bool operator!();
230 bool operator!=(const A&);
231 };
232
233 bool operator!=(int, const A&);
234
getA()235 A getA() { return A(); }
getA(int x)236 A getA(int x) { return A(); }
getA(A * a)237 A getA(A* a) { return A(); }
getA(A a)238 A getA(A a) { return A(); }
moveA(A && a)239 A moveA(A&& a) { return A(); }
const_refA(const A & a)240 A const_refA(const A& a) { return A(); }
241
setupA(bool x)242 void setupA(bool x) {
243 A a1;
244 a1.set(a1.get());
245 A a2(a1.get());
246 A a3(a1);
247 A a4(&a4);
248 A a5(a5.zero());
249 A a6(a6.ONE);
250 A a7 = getA();
251 A a8 = getA(a8.TWO);
252 A a9 = getA(&a9);
253 A a10(a10.count);
254
255 A a11(a11); // expected-warning {{variable 'a11' is uninitialized when used within its own initialization}}
256 A a12(a12.get()); // expected-warning {{variable 'a12' is uninitialized when used within its own initialization}}
257 A a13(a13.num); // expected-warning {{variable 'a13' is uninitialized when used within its own initialization}}
258 A a14 = A(a14); // expected-warning {{variable 'a14' is uninitialized when used within its own initialization}}
259 A a15 = getA(a15.num); // expected-warning {{variable 'a15' is uninitialized when used within its own initialization}}
260 A a16(&a16.num); // expected-warning {{variable 'a16' is uninitialized when used within its own initialization}}
261 A a17(a17.get2()); // expected-warning {{variable 'a17' is uninitialized when used within its own initialization}}
262 A a18 = x ? a18 : a17; // expected-warning {{variable 'a18' is uninitialized when used within its own initialization}}
263 A a19 = getA(x ? a19 : a17); // expected-warning {{variable 'a19' is uninitialized when used within its own initialization}}
264 A a20{a20}; // expected-warning {{variable 'a20' is uninitialized when used within its own initialization}}
265 A a21 = {a21}; // expected-warning {{variable 'a21' is uninitialized when used within its own initialization}}
266
267 // FIXME: Make the local uninitialized warning consistent with the global
268 // uninitialized checking.
269 A *a22 = new A(a22->count); // expected-warning {{variable 'a22' is uninitialized when used within its own initialization}}
270 A *a23 = new A(a23->ONE); // expected-warning {{variable 'a23' is uninitialized when used within its own initialization}}
271 A *a24 = new A(a24->TWO); // expected-warning {{variable 'a24' is uninitialized when used within its own initialization}}
272 A *a25 = new A(a25->zero()); // expected-warning {{variable 'a25' is uninitialized when used within its own initialization}}
273
274 A *a26 = new A(a26->get()); // expected-warning {{variable 'a26' is uninitialized when used within its own initialization}}
275 A *a27 = new A(a27->get2()); // expected-warning {{variable 'a27' is uninitialized when used within its own initialization}}
276 A *a28 = new A(a28->num); // expected-warning {{variable 'a28' is uninitialized when used within its own initialization}}
277
278 const A a29(a29); // expected-warning {{variable 'a29' is uninitialized when used within its own initialization}}
279 const A a30 = a30; // expected-warning {{variable 'a30' is uninitialized when used within its own initialization}}
280
281 A a31 = std::move(a31); // expected-warning {{variable 'a31' is uninitialized when used within its own initialization}}
282 A a32 = moveA(std::move(a32)); // expected-warning {{variable 'a32' is uninitialized when used within its own initialization}}
283 A a33 = A(std::move(a33)); // expected-warning {{variable 'a33' is uninitialized when used within its own initialization}}
284 A a34(std::move(a34)); // expected-warning {{variable 'a34' is uninitialized when used within its own initialization}}
285 A a35 = std::move(x ? a34 : (37, a35)); // expected-warning {{variable 'a35' is uninitialized when used within its own initialization}}
286
287 A a36 = const_refA(a36);
288 A a37(const_refA(a37));
289
290 A a38({a38}); // expected-warning {{variable 'a38' is uninitialized when used within its own initialization}}
291 A a39 = {a39}; // expected-warning {{variable 'a39' is uninitialized when used within its own initialization}}
292 A a40 = A({a40}); // expected-warning {{variable 'a40' is uninitialized when used within its own initialization}}
293
294 A a41 = !a41; // expected-warning {{variable 'a41' is uninitialized when used within its own initialization}}
295 A a42 = !(a42); // expected-warning {{variable 'a42' is uninitialized when used within its own initialization}}
296 A a43 = a43 != a42; // expected-warning {{variable 'a43' is uninitialized when used within its own initialization}}
297 A a44 = a43 != a44; // expected-warning {{variable 'a44' is uninitialized when used within its own initialization}}
298 A a45 = a45 != a45; // expected-warning 2{{variable 'a45' is uninitialized when used within its own initialization}}
299 A a46 = 0 != a46; // expected-warning {{variable 'a46' is uninitialized when used within its own initialization}}
300
301 A a47(a47.set(a47.num)); // expected-warning 2{{variable 'a47' is uninitialized when used within its own initialization}}
302 A a48(a47.set(a48.num)); // expected-warning {{variable 'a48' is uninitialized when used within its own initialization}}
303 A a49(a47.set(a48.num));
304 }
305
306 bool cond;
307
308 A a1;
309 A a2(a1.get());
310 A a3(a1);
311 A a4(&a4);
312 A a5(a5.zero());
313 A a6(a6.ONE);
314 A a7 = getA();
315 A a8 = getA(a8.TWO);
316 A a9 = getA(&a9);
317 A a10(a10.count);
318
319 A a11(a11); // expected-warning {{variable 'a11' is uninitialized when used within its own initialization}}
320 A a12(a12.get()); // expected-warning {{variable 'a12' is uninitialized when used within its own initialization}}
321 A a13(a13.num); // expected-warning {{variable 'a13' is uninitialized when used within its own initialization}}
322 A a14 = A(a14); // expected-warning {{variable 'a14' is uninitialized when used within its own initialization}}
323 A a15 = getA(a15.num); // expected-warning {{variable 'a15' is uninitialized when used within its own initialization}}
324 A a16(&a16.num); // expected-warning {{variable 'a16' is uninitialized when used within its own initialization}}
325 A a17(a17.get2()); // expected-warning {{variable 'a17' is uninitialized when used within its own initialization}}
326 A a18 = cond ? a18 : a17; // expected-warning {{variable 'a18' is uninitialized when used within its own initialization}}
327 A a19 = getA(cond ? a19 : a17); // expected-warning {{variable 'a19' is uninitialized when used within its own initialization}}
328 A a20{a20}; // expected-warning {{variable 'a20' is uninitialized when used within its own initialization}}
329 A a21 = {a21}; // expected-warning {{variable 'a21' is uninitialized when used within its own initialization}}
330
331 A *a22 = new A(a22->count);
332 A *a23 = new A(a23->ONE);
333 A *a24 = new A(a24->TWO);
334 A *a25 = new A(a25->zero());
335
336 A *a26 = new A(a26->get()); // expected-warning {{variable 'a26' is uninitialized when used within its own initialization}}
337 A *a27 = new A(a27->get2()); // expected-warning {{variable 'a27' is uninitialized when used within its own initialization}}
338 A *a28 = new A(a28->num); // expected-warning {{variable 'a28' is uninitialized when used within its own initialization}}
339
340 const A a29(a29); // expected-warning {{variable 'a29' is uninitialized when used within its own initialization}}
341 const A a30 = a30; // expected-warning {{variable 'a30' is uninitialized when used within its own initialization}}
342
343 A a31 = std::move(a31); // expected-warning {{variable 'a31' is uninitialized when used within its own initialization}}
344 A a32 = moveA(std::move(a32)); // expected-warning {{variable 'a32' is uninitialized when used within its own initialization}}
345 A a33 = A(std::move(a33)); // expected-warning {{variable 'a33' is uninitialized when used within its own initialization}}
346 A a34(std::move(a34)); // expected-warning {{variable 'a34' is uninitialized when used within its own initialization}}
347 A a35 = std::move(x ? a34 : (37, a35)); // expected-warning {{variable 'a35' is uninitialized when used within its own initialization}}
348
349 A a36 = const_refA(a36);
350 A a37(const_refA(a37));
351
352 A a38({a38}); // expected-warning {{variable 'a38' is uninitialized when used within its own initialization}}
353 A a39 = {a39}; // expected-warning {{variable 'a39' is uninitialized when used within its own initialization}}
354 A a40 = A({a40}); // expected-warning {{variable 'a40' is uninitialized when used within its own initialization}}
355
356 A a41 = !a41; // expected-warning {{variable 'a41' is uninitialized when used within its own initialization}}
357 A a42 = !(a42); // expected-warning {{variable 'a42' is uninitialized when used within its own initialization}}
358 A a43 = a43 != a42; // expected-warning {{variable 'a43' is uninitialized when used within its own initialization}}
359 A a44 = a43 != a44; // expected-warning {{variable 'a44' is uninitialized when used within its own initialization}}
360 A a45 = a45 != a45; // expected-warning 2{{variable 'a45' is uninitialized when used within its own initialization}}
361
362 A a46 = 0 != a46; // expected-warning {{variable 'a46' is uninitialized when used within its own initialization}}
363
364 A a47(a47.set(a47.num)); // expected-warning 2{{variable 'a47' is uninitialized when used within its own initialization}}
365 A a48(a47.set(a48.num)); // expected-warning {{variable 'a48' is uninitialized when used within its own initialization}}
366 A a49(a47.set(a48.num));
367
368 class T {
369 A a, a2;
370 const A c_a;
371 A* ptr_a;
372
T()373 T() {}
T(bool (*)[1])374 T(bool (*)[1]) : a() {}
T(bool (*)[2])375 T(bool (*)[2]) : a2(a.get()) {}
T(bool (*)[3])376 T(bool (*)[3]) : a2(a) {}
T(bool (*)[4])377 T(bool (*)[4]) : a(&a) {}
T(bool (*)[5])378 T(bool (*)[5]) : a(a.zero()) {}
T(bool (*)[6])379 T(bool (*)[6]) : a(a.ONE) {}
T(bool (*)[7])380 T(bool (*)[7]) : a(getA()) {}
T(bool (*)[8])381 T(bool (*)[8]) : a2(getA(a.TWO)) {}
T(bool (*)[9])382 T(bool (*)[9]) : a(getA(&a)) {}
T(bool (*)[10])383 T(bool (*)[10]) : a(a.count) {}
384
T(bool (*)[11])385 T(bool (*)[11]) : a(a) {} // expected-warning {{field 'a' is uninitialized when used here}}
T(bool (*)[12])386 T(bool (*)[12]) : a(a.get()) {} // expected-warning {{field 'a' is uninitialized when used here}}
T(bool (*)[13])387 T(bool (*)[13]) : a(a.num) {} // expected-warning {{field 'a' is uninitialized when used here}}
T(bool (*)[14])388 T(bool (*)[14]) : a(A(a)) {} // expected-warning {{field 'a' is uninitialized when used here}}
T(bool (*)[15])389 T(bool (*)[15]) : a(getA(a.num)) {} // expected-warning {{field 'a' is uninitialized when used here}}
T(bool (*)[16])390 T(bool (*)[16]) : a(&a.num) {} // expected-warning {{field 'a' is uninitialized when used here}}
T(bool (*)[17])391 T(bool (*)[17]) : a(a.get2()) {} // expected-warning {{field 'a' is uninitialized when used here}}
T(bool (*)[18])392 T(bool (*)[18]) : a2(cond ? a2 : a) {} // expected-warning {{field 'a2' is uninitialized when used here}}
T(bool (*)[19])393 T(bool (*)[19]) : a2(cond ? a2 : a) {} // expected-warning {{field 'a2' is uninitialized when used here}}
T(bool (*)[20])394 T(bool (*)[20]) : a{a} {} // expected-warning {{field 'a' is uninitialized when used here}}
T(bool (*)[21])395 T(bool (*)[21]) : a({a}) {} // expected-warning {{field 'a' is uninitialized when used here}}
396
T(bool (*)[22])397 T(bool (*)[22]) : ptr_a(new A(ptr_a->count)) {}
T(bool (*)[23])398 T(bool (*)[23]) : ptr_a(new A(ptr_a->ONE)) {}
T(bool (*)[24])399 T(bool (*)[24]) : ptr_a(new A(ptr_a->TWO)) {}
T(bool (*)[25])400 T(bool (*)[25]) : ptr_a(new A(ptr_a->zero())) {}
401
T(bool (*)[26])402 T(bool (*)[26]) : ptr_a(new A(ptr_a->get())) {} // expected-warning {{field 'ptr_a' is uninitialized when used here}}
T(bool (*)[27])403 T(bool (*)[27]) : ptr_a(new A(ptr_a->get2())) {} // expected-warning {{field 'ptr_a' is uninitialized when used here}}
T(bool (*)[28])404 T(bool (*)[28]) : ptr_a(new A(ptr_a->num)) {} // expected-warning {{field 'ptr_a' is uninitialized when used here}}
405
T(bool (*)[29])406 T(bool (*)[29]) : c_a(c_a) {} // expected-warning {{field 'c_a' is uninitialized when used here}}
T(bool (*)[30])407 T(bool (*)[30]) : c_a(A(c_a)) {} // expected-warning {{field 'c_a' is uninitialized when used here}}
408
T(bool (*)[31])409 T(bool (*)[31]) : a(std::move(a)) {} // expected-warning {{field 'a' is uninitialized when used here}}
T(bool (*)[32])410 T(bool (*)[32]) : a(moveA(std::move(a))) {} // expected-warning {{field 'a' is uninitialized when used here}}
T(bool (*)[33])411 T(bool (*)[33]) : a(A(std::move(a))) {} // expected-warning {{field 'a' is uninitialized when used here}}
T(bool (*)[34])412 T(bool (*)[34]) : a(A(std::move(a))) {} // expected-warning {{field 'a' is uninitialized when used here}}
T(bool (*)[35])413 T(bool (*)[35]) : a2(std::move(x ? a : (37, a2))) {} // expected-warning {{field 'a2' is uninitialized when used here}}
414
T(bool (*)[36])415 T(bool (*)[36]) : a(const_refA(a)) {}
T(bool (*)[37])416 T(bool (*)[37]) : a(A(const_refA(a))) {}
417
T(bool (*)[38])418 T(bool (*)[38]) : a({a}) {} // expected-warning {{field 'a' is uninitialized when used here}}
T(bool (*)[39])419 T(bool (*)[39]) : a{a} {} // expected-warning {{field 'a' is uninitialized when used here}}
T(bool (*)[40])420 T(bool (*)[40]) : a({a}) {} // expected-warning {{field 'a' is uninitialized when used here}}
421
T(bool (*)[41])422 T(bool (*)[41]) : a(!a) {} // expected-warning {{field 'a' is uninitialized when used here}}
T(bool (*)[42])423 T(bool (*)[42]) : a(!(a)) {} // expected-warning {{field 'a' is uninitialized when used here}}
T(bool (*)[43])424 T(bool (*)[43]) : a(), a2(a2 != a) {} // expected-warning {{field 'a2' is uninitialized when used here}}
T(bool (*)[44])425 T(bool (*)[44]) : a(), a2(a != a2) {} // expected-warning {{field 'a2' is uninitialized when used here}}
T(bool (*)[45])426 T(bool (*)[45]) : a(a != a) {} // expected-warning 2{{field 'a' is uninitialized when used here}}
T(bool (*)[46])427 T(bool (*)[46]) : a(0 != a) {} // expected-warning {{field 'a' is uninitialized when used here}}
428
T(bool (*)[47])429 T(bool (*)[47]) : a2(a2.set(a2.num)) {} // expected-warning 2{{field 'a2' is uninitialized when used here}}
T(bool (*)[48])430 T(bool (*)[48]) : a2(a.set(a2.num)) {} // expected-warning {{field 'a2' is uninitialized when used here}}
T(bool (*)[49])431 T(bool (*)[49]) : a2(a.set(a.num)) {}
432
433 };
434
435 struct B {
436 // POD struct.
437 int x;
438 int *y;
439 };
440
getB()441 B getB() { return B(); };
getB(int x)442 B getB(int x) { return B(); };
getB(int * x)443 B getB(int *x) { return B(); };
getB(B * b)444 B getB(B *b) { return B(); };
moveB(B && b)445 B moveB(B &&b) { return B(); };
446
getPtrB()447 B* getPtrB() { return 0; };
getPtrB(int x)448 B* getPtrB(int x) { return 0; };
getPtrB(int * x)449 B* getPtrB(int *x) { return 0; };
getPtrB(B ** b)450 B* getPtrB(B **b) { return 0; };
451
setupB(bool x)452 void setupB(bool x) {
453 B b1;
454 B b2(b1);
455 B b3 = { 5, &b3.x };
456 B b4 = getB();
457 B b5 = getB(&b5);
458 B b6 = getB(&b6.x);
459
460 // Silence unused warning
461 (void) b2;
462 (void) b4;
463
464 B b7(b7); // expected-warning {{variable 'b7' is uninitialized when used within its own initialization}}
465 B b8 = getB(b8.x); // expected-warning {{variable 'b8' is uninitialized when used within its own initialization}}
466 B b9 = getB(b9.y); // expected-warning {{variable 'b9' is uninitialized when used within its own initialization}}
467 B b10 = getB(-b10.x); // expected-warning {{variable 'b10' is uninitialized when used within its own initialization}}
468
469 B* b11 = 0;
470 B* b12(b11);
471 B* b13 = getPtrB();
472 B* b14 = getPtrB(&b14);
473
474 (void) b12;
475 (void) b13;
476
477 B* b15 = getPtrB(b15->x); // expected-warning {{variable 'b15' is uninitialized when used within its own initialization}}
478 B* b16 = getPtrB(b16->y); // expected-warning {{variable 'b16' is uninitialized when used within its own initialization}}
479
480 B b17 = { b17.x = 5, b17.y = 0 };
481 B b18 = { b18.x + 1, b18.y }; // expected-warning 2{{variable 'b18' is uninitialized when used within its own initialization}}
482
483 const B b19 = b19; // expected-warning {{variable 'b19' is uninitialized when used within its own initialization}}
484 const B b20(b20); // expected-warning {{variable 'b20' is uninitialized when used within its own initialization}}
485
486 B b21 = std::move(b21); // expected-warning {{variable 'b21' is uninitialized when used within its own initialization}}
487 B b22 = moveB(std::move(b22)); // expected-warning {{variable 'b22' is uninitialized when used within its own initialization}}
488 B b23 = B(std::move(b23)); // expected-warning {{variable 'b23' is uninitialized when used within its own initialization}}
489 B b24 = std::move(x ? b23 : (18, b24)); // expected-warning {{variable 'b24' is uninitialized when used within its own initialization}}
490 }
491
492 B b1;
493 B b2(b1);
494 B b3 = { 5, &b3.x };
495 B b4 = getB();
496 B b5 = getB(&b5);
497 B b6 = getB(&b6.x);
498
499 B b7(b7); // expected-warning {{variable 'b7' is uninitialized when used within its own initialization}}
500 B b8 = getB(b8.x); // expected-warning {{variable 'b8' is uninitialized when used within its own initialization}}
501 B b9 = getB(b9.y); // expected-warning {{variable 'b9' is uninitialized when used within its own initialization}}
502 B b10 = getB(-b10.x); // expected-warning {{variable 'b10' is uninitialized when used within its own initialization}}
503
504 B* b11 = 0;
505 B* b12(b11);
506 B* b13 = getPtrB();
507 B* b14 = getPtrB(&b14);
508
509 B* b15 = getPtrB(b15->x); // expected-warning {{variable 'b15' is uninitialized when used within its own initialization}}
510 B* b16 = getPtrB(b16->y); // expected-warning {{variable 'b16' is uninitialized when used within its own initialization}}
511
512 B b17 = { b17.x = 5, b17.y = 0 };
513 B b18 = { b18.x + 1, b18.y }; // expected-warning 2{{variable 'b18' is uninitialized when used within its own initialization}}
514
515 const B b19 = b19; // expected-warning {{variable 'b19' is uninitialized when used within its own initialization}}
516 const B b20(b20); // expected-warning {{variable 'b20' is uninitialized when used within its own initialization}}
517
518 B b21 = std::move(b21); // expected-warning {{variable 'b21' is uninitialized when used within its own initialization}}
519 B b22 = moveB(std::move(b22)); // expected-warning {{variable 'b22' is uninitialized when used within its own initialization}}
520 B b23 = B(std::move(b23)); // expected-warning {{variable 'b23' is uninitialized when used within its own initialization}}
521 B b24 = std::move(x ? b23 : (18, b24)); // expected-warning {{variable 'b24' is uninitialized when used within its own initialization}}
522
523 class U {
524 B b1, b2;
525 B *ptr1, *ptr2;
526 const B constb = {};
527
U()528 U() {}
U(bool (*)[1])529 U(bool (*)[1]) : b1() {}
U(bool (*)[2])530 U(bool (*)[2]) : b2(b1) {}
U(bool (*)[3])531 U(bool (*)[3]) : b1{ 5, &b1.x } {}
U(bool (*)[4])532 U(bool (*)[4]) : b1(getB()) {}
U(bool (*)[5])533 U(bool (*)[5]) : b1(getB(&b1)) {}
U(bool (*)[6])534 U(bool (*)[6]) : b1(getB(&b1.x)) {}
535
U(bool (*)[7])536 U(bool (*)[7]) : b1(b1) {} // expected-warning {{field 'b1' is uninitialized when used here}}
U(bool (*)[8])537 U(bool (*)[8]) : b1(getB(b1.x)) {} // expected-warning {{field 'b1' is uninitialized when used here}}
U(bool (*)[9])538 U(bool (*)[9]) : b1(getB(b1.y)) {} // expected-warning {{field 'b1' is uninitialized when used here}}
U(bool (*)[10])539 U(bool (*)[10]) : b1(getB(-b1.x)) {} // expected-warning {{field 'b1' is uninitialized when used here}}
540
U(bool (*)[11])541 U(bool (*)[11]) : ptr1(0) {}
U(bool (*)[12])542 U(bool (*)[12]) : ptr1(0), ptr2(ptr1) {}
U(bool (*)[13])543 U(bool (*)[13]) : ptr1(getPtrB()) {}
U(bool (*)[14])544 U(bool (*)[14]) : ptr1(getPtrB(&ptr1)) {}
545
U(bool (*)[15])546 U(bool (*)[15]) : ptr1(getPtrB(ptr1->x)) {} // expected-warning {{field 'ptr1' is uninitialized when used here}}
U(bool (*)[16])547 U(bool (*)[16]) : ptr2(getPtrB(ptr2->y)) {} // expected-warning {{field 'ptr2' is uninitialized when used here}}
548
U(bool (*)[17])549 U(bool (*)[17]) : b1 { b1.x = 5, b1.y = 0 } {}
U(bool (*)[18])550 U(bool (*)[18]) : b1 { b1.x + 1, b1.y } {} // expected-warning 2{{field 'b1' is uninitialized when used here}}
551
U(bool (*)[19])552 U(bool (*)[19]) : constb(constb) {} // expected-warning {{field 'constb' is uninitialized when used here}}
U(bool (*)[20])553 U(bool (*)[20]) : constb(B(constb)) {} // expected-warning {{field 'constb' is uninitialized when used here}}
554
U(bool (*)[21])555 U(bool (*)[21]) : b1(std::move(b1)) {} // expected-warning {{field 'b1' is uninitialized when used here}}
U(bool (*)[22])556 U(bool (*)[22]) : b1(moveB(std::move(b1))) {} // expected-warning {{field 'b1' is uninitialized when used here}}
U(bool (*)[23])557 U(bool (*)[23]) : b1(B(std::move(b1))) {} // expected-warning {{field 'b1' is uninitialized when used here}}
U(bool (*)[24])558 U(bool (*)[24]) : b2(std::move(x ? b1 : (18, b2))) {} // expected-warning {{field 'b2' is uninitialized when used here}}
559 };
560
561 struct C { char a[100], *e; } car = { .e = car.a };
562
563 // <rdar://problem/10398199>
564 namespace rdar10398199 {
~FooBase()565 class FooBase { protected: ~FooBase() {} };
566 class Foo : public FooBase {
567 public:
568 operator int&() const;
569 };
570 void stuff();
571 template <typename T> class FooImpl : public Foo {
572 T val;
573 public:
FooImpl(const T & x)574 FooImpl(const T &x) : val(x) {}
~FooImpl()575 ~FooImpl() { stuff(); }
576 };
577
makeFoo(const T & x)578 template <typename T> FooImpl<T> makeFoo(const T& x) {
579 return FooImpl<T>(x);
580 }
581
test()582 void test() {
583 const Foo &x = makeFoo(42);
584 const int&y = makeFoo(42u);
585 (void)x;
586 (void)y;
587 };
588 }
589
590 // PR 12325 - this was a false uninitialized value warning due to
591 // a broken CFG.
pr12325(int params)592 int pr12325(int params) {
593 int x = ({
594 while (false)
595 ;
596 int _v = params;
597 if (false)
598 ;
599 _v; // no-warning
600 });
601 return x;
602 }
603
604 // Test lambda expressions with -Wuninitialized
test_lambda()605 int test_lambda() {
606 auto f1 = [] (int x, int y) { int z; return x + y + z; }; // expected-warning{{variable 'z' is uninitialized when used here}} expected-note {{initialize the variable 'z' to silence this warning}}
607 return f1(1, 2);
608 }
609
610 namespace {
611 struct A {
612 enum { A1 };
A2__anon9f4f4b4f0211::A613 static int A2() {return 5;}
614 int A3;
A4__anon9f4f4b4f0211::A615 int A4() { return 5;}
616 };
617
618 struct B {
619 A a;
620 };
621
622 struct C {
C__anon9f4f4b4f0211::C623 C() {}
C__anon9f4f4b4f0211::C624 C(int x) {}
625 static A a;
626 B b;
627 };
628 A C::a = A();
629
630 // Accessing non-static members will give a warning.
631 struct D {
632 C c;
D__anon9f4f4b4f0211::D633 D(char (*)[1]) : c(c.b.a.A1) {}
D__anon9f4f4b4f0211::D634 D(char (*)[2]) : c(c.b.a.A2()) {}
D__anon9f4f4b4f0211::D635 D(char (*)[3]) : c(c.b.a.A3) {} // expected-warning {{field 'c' is uninitialized when used here}}
D__anon9f4f4b4f0211::D636 D(char (*)[4]) : c(c.b.a.A4()) {} // expected-warning {{field 'c' is uninitialized when used here}}
637
638 // c::a is static, so it is already initialized
D__anon9f4f4b4f0211::D639 D(char (*)[5]) : c(c.a.A1) {}
D__anon9f4f4b4f0211::D640 D(char (*)[6]) : c(c.a.A2()) {}
D__anon9f4f4b4f0211::D641 D(char (*)[7]) : c(c.a.A3) {}
D__anon9f4f4b4f0211::D642 D(char (*)[8]) : c(c.a.A4()) {}
643 };
644
645 struct E {
646 int b = 1;
647 int c = 1;
648 int a; // This field needs to be last to prevent the cross field
649 // uninitialized warning.
E__anon9f4f4b4f0211::E650 E(char (*)[1]) : a(a ? b : c) {} // expected-warning {{field 'a' is uninitialized when used here}}
E__anon9f4f4b4f0211::E651 E(char (*)[2]) : a(b ? a : a) {} // expected-warning 2{{field 'a' is uninitialized when used here}}
E__anon9f4f4b4f0211::E652 E(char (*)[3]) : a(b ? (a) : c) {} // expected-warning {{field 'a' is uninitialized when used here}}
E__anon9f4f4b4f0211::E653 E(char (*)[4]) : a(b ? c : (a+c)) {} // expected-warning {{field 'a' is uninitialized when used here}}
E__anon9f4f4b4f0211::E654 E(char (*)[5]) : a(b ? c : b) {}
655
E__anon9f4f4b4f0211::E656 E(char (*)[6]) : a(a ?: a) {} // expected-warning 2{{field 'a' is uninitialized when used here}}
E__anon9f4f4b4f0211::E657 E(char (*)[7]) : a(b ?: a) {} // expected-warning {{field 'a' is uninitialized when used here}}
E__anon9f4f4b4f0211::E658 E(char (*)[8]) : a(a ?: c) {} // expected-warning {{field 'a' is uninitialized when used here}}
E__anon9f4f4b4f0211::E659 E(char (*)[9]) : a(b ?: c) {}
660
E__anon9f4f4b4f0211::E661 E(char (*)[10]) : a((a, a, b)) {}
E__anon9f4f4b4f0211::E662 E(char (*)[11]) : a((c + a, a + 1, b)) {} // expected-warning 2{{field 'a' is uninitialized when used here}}
E__anon9f4f4b4f0211::E663 E(char (*)[12]) : a((b + c, c, a)) {} // expected-warning {{field 'a' is uninitialized when used here}}
E__anon9f4f4b4f0211::E664 E(char (*)[13]) : a((a, a, a, a)) {} // expected-warning {{field 'a' is uninitialized when used here}}
E__anon9f4f4b4f0211::E665 E(char (*)[14]) : a((b, c, c)) {}
E__anon9f4f4b4f0211::E666 E(char (*)[15]) : a(b ?: a) {} // expected-warning {{field 'a' is uninitialized when used here}}
E__anon9f4f4b4f0211::E667 E(char (*)[16]) : a(a ?: b) {} // expected-warning {{field 'a' is uninitialized when used here}}
668 };
669
670 struct F {
671 int a;
672 F* f;
F__anon9f4f4b4f0211::F673 F(int) {}
F__anon9f4f4b4f0211::F674 F() {}
675 };
676
677 int F::*ptr = &F::a;
678 F* F::*f_ptr = &F::f;
679 struct G {
680 F f1, f2;
681 F *f3, *f4;
G__anon9f4f4b4f0211::G682 G(char (*)[1]) : f1(f1) {} // expected-warning {{field 'f1' is uninitialized when used here}}
G__anon9f4f4b4f0211::G683 G(char (*)[2]) : f2(f1) {}
G__anon9f4f4b4f0211::G684 G(char (*)[3]) : f2(F()) {}
685
G__anon9f4f4b4f0211::G686 G(char (*)[4]) : f1(f1.*ptr) {} // expected-warning {{field 'f1' is uninitialized when used here}}
G__anon9f4f4b4f0211::G687 G(char (*)[5]) : f2(f1.*ptr) {}
688
G__anon9f4f4b4f0211::G689 G(char (*)[6]) : f3(f3) {} // expected-warning {{field 'f3' is uninitialized when used here}}
G__anon9f4f4b4f0211::G690 G(char (*)[7]) : f3(f3->*f_ptr) {} // expected-warning {{field 'f3' is uninitialized when used here}}
G__anon9f4f4b4f0211::G691 G(char (*)[8]) : f3(new F(f3->*ptr)) {} // expected-warning {{field 'f3' is uninitialized when used here}}
692 };
693
694 struct H {
H__anon9f4f4b4f0211::H695 H() : a(a) {} // expected-warning {{field 'a' is uninitialized when used here}}
696 const A a;
697 };
698 }
699
700 namespace statics {
701 static int a = a; // no-warning: used to signal intended lack of initialization.
702 static int b = b + 1; // expected-warning {{variable 'b' is uninitialized when used within its own initialization}}
703 static int c = (c + c); // expected-warning 2{{variable 'c' is uninitialized when used within its own initialization}}
704 static int e = static_cast<long>(e) + 1; // expected-warning {{variable 'e' is uninitialized when used within its own initialization}}
705 static int f = foo(f); // expected-warning {{variable 'f' is uninitialized when used within its own initialization}}
706
707 // Thes don't warn as they don't require the value.
708 static int g = sizeof(g);
709 int gg = g; // Silence unneeded warning
710 static void* ptr = &ptr;
711 static int h = bar(&h);
712 static int i = boo(i);
713 static int j = far(j);
714 static int k = __alignof__(k);
715
716 static int l = k ? l : l; // expected-warning 2{{variable 'l' is uninitialized when used within its own initialization}}
717 static int m = 1 + (k ? m : m); // expected-warning 2{{variable 'm' is uninitialized when used within its own initialization}}
718 static int n = -n; // expected-warning {{variable 'n' is uninitialized when used within its own initialization}}
719 static int o = std::move(o); // expected-warning {{variable 'o' is uninitialized when used within its own initialization}}
720 static const int p = std::move(p); // expected-warning {{variable 'p' is uninitialized when used within its own initialization}}
721 static int q = moved(std::move(q)); // expected-warning {{variable 'q' is uninitialized when used within its own initialization}}
722 static int r = std::move((p ? q : (18, r))); // expected-warning {{variable 'r' is uninitialized when used within its own initialization}}
723 static int s = r ?: s; // expected-warning {{variable 's' is uninitialized when used within its own initialization}}
724 static int t = t ?: s; // expected-warning {{variable 't' is uninitialized when used within its own initialization}}
725 static int u = (foo(u), s); // expected-warning {{variable 'u' is uninitialized when used within its own initialization}}
726 static int v = (u += v); // expected-warning {{variable 'v' is uninitialized when used within its own initialization}}
727 static int w = (w += 10); // expected-warning {{variable 'w' is uninitialized when used within its own initialization}}
728 static int x = x++; // expected-warning {{variable 'x' is uninitialized when used within its own initialization}}
729 static int y = ((s ? (y, v) : (77, y))++, sizeof(y)); // expected-warning {{variable 'y' is uninitialized when used within its own initialization}}
730 static int z = ++ref(z); // expected-warning {{variable 'z' is uninitialized when used within its own initialization}}
731 static int aa = (ref(aa) += 10); // expected-warning {{variable 'aa' is uninitialized when used within its own initialization}}
732 static int bb = bb ? x : y; // expected-warning {{variable 'bb' is uninitialized when used within its own initialization}}
733
734
test()735 void test() {
736 static int a = a; // no-warning: used to signal intended lack of initialization.
737 static int b = b + 1; // expected-warning {{static variable 'b' is suspiciously used within its own initialization}}
738 static int c = (c + c); // expected-warning 2{{static variable 'c' is suspiciously used within its own initialization}}
739 static int d = ({ d + d ;}); // expected-warning 2{{static variable 'd' is suspiciously used within its own initialization}}
740 static int e = static_cast<long>(e) + 1; // expected-warning {{static variable 'e' is suspiciously used within its own initialization}}
741 static int f = foo(f); // expected-warning {{static variable 'f' is suspiciously used within its own initialization}}
742
743 // Thes don't warn as they don't require the value.
744 static int g = sizeof(g);
745 static void* ptr = &ptr;
746 static int h = bar(&h);
747 static int i = boo(i);
748 static int j = far(j);
749 static int k = __alignof__(k);
750
751 static int l = k ? l : l; // expected-warning 2{{static variable 'l' is suspiciously used within its own initialization}}
752 static int m = 1 + (k ? m : m); // expected-warning 2{{static variable 'm' is suspiciously used within its own initialization}}
753 static int n = -n; // expected-warning {{static variable 'n' is suspiciously used within its own initialization}}
754 static int o = std::move(o); // expected-warning {{static variable 'o' is suspiciously used within its own initialization}}
755 static const int p = std::move(p); // expected-warning {{static variable 'p' is suspiciously used within its own initialization}}
756 static int q = moved(std::move(q)); // expected-warning {{static variable 'q' is suspiciously used within its own initialization}}
757 static int r = std::move((p ? q : (18, r))); // expected-warning {{static variable 'r' is suspiciously used within its own initialization}}
758 static int s = r ?: s; // expected-warning {{static variable 's' is suspiciously used within its own initialization}}
759 static int t = t ?: s; // expected-warning {{static variable 't' is suspiciously used within its own initialization}}
760 static int u = (foo(u), s); // expected-warning {{static variable 'u' is suspiciously used within its own initialization}}
761 static int v = (u += v); // expected-warning {{static variable 'v' is suspiciously used within its own initialization}}
762 static int w = (w += 10); // expected-warning {{static variable 'w' is suspiciously used within its own initialization}}
763 static int x = x++; // expected-warning {{static variable 'x' is suspiciously used within its own initialization}}
764 static int y = ((s ? (y, v) : (77, y))++, sizeof(y)); // expected-warning {{static variable 'y' is suspiciously used within its own initialization}}
765 static int z = ++ref(z); // expected-warning {{static variable 'z' is suspiciously used within its own initialization}}
766 static int aa = (ref(aa) += 10); // expected-warning {{static variable 'aa' is suspiciously used within its own initialization}}
767 static int bb = bb ? x : y; // expected-warning {{static variable 'bb' is suspiciously used within its own initialization}}
768
769 for (;;) {
770 static int a = a; // no-warning: used to signal intended lack of initialization.
771 static int b = b + 1; // expected-warning {{static variable 'b' is suspiciously used within its own initialization}}
772 static int c = (c + c); // expected-warning 2{{static variable 'c' is suspiciously used within its own initialization}}
773 static int d = ({ d + d ;}); // expected-warning 2{{static variable 'd' is suspiciously used within its own initialization}}
774 static int e = static_cast<long>(e) + 1; // expected-warning {{static variable 'e' is suspiciously used within its own initialization}}
775 static int f = foo(f); // expected-warning {{static variable 'f' is suspiciously used within its own initialization}}
776
777 // Thes don't warn as they don't require the value.
778 static int g = sizeof(g);
779 static void* ptr = &ptr;
780 static int h = bar(&h);
781 static int i = boo(i);
782 static int j = far(j);
783 static int k = __alignof__(k);
784
785 static int l = k ? l : l; // expected-warning 2{{static variable 'l' is suspiciously used within its own initialization}}
786 static int m = 1 + (k ? m : m); // expected-warning 2{{static variable 'm' is suspiciously used within its own initialization}}
787 static int n = -n; // expected-warning {{static variable 'n' is suspiciously used within its own initialization}}
788 static int o = std::move(o); // expected-warning {{static variable 'o' is suspiciously used within its own initialization}}
789 static const int p = std::move(p); // expected-warning {{static variable 'p' is suspiciously used within its own initialization}}
790 static int q = moved(std::move(q)); // expected-warning {{static variable 'q' is suspiciously used within its own initialization}}
791 static int r = std::move((p ? q : (18, r))); // expected-warning {{static variable 'r' is suspiciously used within its own initialization}}
792 static int s = r ?: s; // expected-warning {{static variable 's' is suspiciously used within its own initialization}}
793 static int t = t ?: s; // expected-warning {{static variable 't' is suspiciously used within its own initialization}}
794 static int u = (foo(u), s); // expected-warning {{static variable 'u' is suspiciously used within its own initialization}}
795 static int v = (u += v); // expected-warning {{static variable 'v' is suspiciously used within its own initialization}}
796 static int w = (w += 10); // expected-warning {{static variable 'w' is suspiciously used within its own initialization}}
797 static int x = x++; // expected-warning {{static variable 'x' is suspiciously used within its own initialization}}
798 static int y = ((s ? (y, v) : (77, y))++, sizeof(y)); // expected-warning {{static variable 'y' is suspiciously used within its own initialization}}
799 static int z = ++ref(z); // expected-warning {{static variable 'z' is suspiciously used within its own initialization}}
800 static int aa = (ref(aa) += 10); // expected-warning {{static variable 'aa' is suspiciously used within its own initialization}}
801 static int bb = bb ? x : y; // expected-warning {{static variable 'bb' is suspiciously used within its own initialization}}
802 }
803 }
804 }
805
806 namespace in_class_initializers {
807 struct S {
Sin_class_initializers::S808 S() : a(a + 1) {} // expected-warning{{field 'a' is uninitialized when used here}}
809 int a = 42; // Note: because a is in a member initializer list, this initialization is ignored.
810 };
811
812 struct T {
Tin_class_initializers::T813 T() : b(a + 1) {} // No-warning.
814 int a = 42;
815 int b;
816 };
817
818 struct U {
Uin_class_initializers::U819 U() : a(b + 1), b(a + 1) {} // expected-warning{{field 'b' is uninitialized when used here}}
820 int a = 42; // Note: because a and b are in the member initializer list, these initializers are ignored.
821 int b = 1;
822 };
823 }
824
825 namespace references {
826 int &a = a; // expected-warning{{reference 'a' is not yet bound to a value when used within its own initialization}}
827 int &b(b); // expected-warning{{reference 'b' is not yet bound to a value when used within its own initialization}}
828 int &c = a ? b : c; // expected-warning{{reference 'c' is not yet bound to a value when used within its own initialization}}
829 int &d{d}; // expected-warning{{reference 'd' is not yet bound to a value when used within its own initialization}}
830 int &e = d ?: e; // expected-warning{{reference 'e' is not yet bound to a value when used within its own initialization}}
831 int &f = f ?: d; // expected-warning{{reference 'f' is not yet bound to a value when used within its own initialization}}
832
833 int &return_ref1(int);
834 int &return_ref2(int&);
835
836 int &g = return_ref1(g); // expected-warning{{reference 'g' is not yet bound to a value when used within its own initialization}}
837 int &h = return_ref2(h); // expected-warning{{reference 'h' is not yet bound to a value when used within its own initialization}}
838
839 struct S {
Sreferences::S840 S() : a(a) {} // expected-warning{{reference 'a' is not yet bound to a value when used here}}
841 int &a;
842 };
843
test()844 void test() {
845 int &a = a; // expected-warning{{reference 'a' is not yet bound to a value when used within its own initialization}}
846 int &b(b); // expected-warning{{reference 'b' is not yet bound to a value when used within its own initialization}}
847 int &c = a ? b : c; // expected-warning{{reference 'c' is not yet bound to a value when used within its own initialization}}
848 int &d{d}; // expected-warning{{reference 'd' is not yet bound to a value when used within its own initialization}}
849 }
850
851 struct T {
Treferences::T852 T() // expected-note{{during field initialization in this constructor}}
853 : a(b), b(a) {} // expected-warning{{reference 'b' is not yet bound to a value when used here}}
854 int &a, &b;
855 int &c = c; // expected-warning{{reference 'c' is not yet bound to a value when used here}}
856 };
857
858 int x;
859 struct U {
Ureferences::U860 U() : b(a) {} // No-warning.
861 int &a = x;
862 int &b;
863 };
864 }
865
866 namespace operators {
867 struct A {
868 A(bool);
869 bool operator==(A);
870 };
871
872 A makeA();
873
874 A a1 = a1 = makeA(); // expected-warning{{variable 'a1' is uninitialized when used within its own initialization}}
875 A a2 = a2 == a1; // expected-warning{{variable 'a2' is uninitialized when used within its own initialization}}
876 A a3 = a2 == a3; // expected-warning{{variable 'a3' is uninitialized when used within its own initialization}}
877
878 int x = x = 5;
879 }
880
881 namespace lambdas {
882 struct A {
Alambdas::A883 template<typename T> A(T) {}
884 int x;
885 };
__anon9f4f4b4f0402null886 A a0([] { return a0.x; }); // ok
f()887 void f() {
888 A a1([=] { return a1.x; }); // expected-warning{{variable 'a1' is uninitialized when used within its own initialization}}
889 A a2([&] { return a2.x; }); // ok
890 }
891 }
892
893 namespace record_fields {
894 bool x;
895 struct A {
Arecord_fields::A896 A() {}
897 A get();
898 static A num();
899 static A copy(A);
900 static A something(A&);
901 };
902
903 A ref(A&);
904 A const_ref(const A&);
905 A pointer(A*);
906 A normal(A);
907 A rref(A&&);
908
909 struct B {
910 A a;
Brecord_fields::B911 B(char (*)[1]) : a(a) {} // expected-warning {{uninitialized}}
Brecord_fields::B912 B(char (*)[2]) : a(a.get()) {} // expected-warning {{uninitialized}}
Brecord_fields::B913 B(char (*)[3]) : a(a.num()) {}
Brecord_fields::B914 B(char (*)[4]) : a(a.copy(a)) {} // expected-warning {{uninitialized}}
Brecord_fields::B915 B(char (*)[5]) : a(a.something(a)) {}
Brecord_fields::B916 B(char (*)[6]) : a(ref(a)) {}
Brecord_fields::B917 B(char (*)[7]) : a(const_ref(a)) {}
Brecord_fields::B918 B(char (*)[8]) : a(pointer(&a)) {}
Brecord_fields::B919 B(char (*)[9]) : a(normal(a)) {} // expected-warning {{uninitialized}}
Brecord_fields::B920 B(char (*)[10]) : a(std::move(a)) {} // expected-warning {{uninitialized}}
Brecord_fields::B921 B(char (*)[11]) : a(A(std::move(a))) {} // expected-warning {{uninitialized}}
Brecord_fields::B922 B(char (*)[12]) : a(rref(std::move(a))) {} // expected-warning {{uninitialized}}
Brecord_fields::B923 B(char (*)[13]) : a(std::move(x ? a : (25, a))) {} // expected-warning 2{{uninitialized}}
924 };
925 struct C {
Crecord_fields::C926 C() {} // expected-note9{{in this constructor}}
927 A a1 = a1; // expected-warning {{uninitialized}}
928 A a2 = a2.get(); // expected-warning {{uninitialized}}
929 A a3 = a3.num();
930 A a4 = a4.copy(a4); // expected-warning {{uninitialized}}
931 A a5 = a5.something(a5);
932 A a6 = ref(a6);
933 A a7 = const_ref(a7);
934 A a8 = pointer(&a8);
935 A a9 = normal(a9); // expected-warning {{uninitialized}}
936 const A a10 = a10; // expected-warning {{uninitialized}}
937 A a11 = std::move(a11); // expected-warning {{uninitialized}}
938 A a12 = A(std::move(a12)); // expected-warning {{uninitialized}}
939 A a13 = rref(std::move(a13)); // expected-warning {{uninitialized}}
940 A a14 = std::move(x ? a13 : (22, a14)); // expected-warning {{uninitialized}}
941 };
942 struct D { // expected-note9{{in the implicit default constructor}}
943 A a1 = a1; // expected-warning {{uninitialized}}
944 A a2 = a2.get(); // expected-warning {{uninitialized}}
945 A a3 = a3.num();
946 A a4 = a4.copy(a4); // expected-warning {{uninitialized}}
947 A a5 = a5.something(a5);
948 A a6 = ref(a6);
949 A a7 = const_ref(a7);
950 A a8 = pointer(&a8);
951 A a9 = normal(a9); // expected-warning {{uninitialized}}
952 const A a10 = a10; // expected-warning {{uninitialized}}
953 A a11 = std::move(a11); // expected-warning {{uninitialized}}
954 A a12 = A(std::move(a12)); // expected-warning {{uninitialized}}
955 A a13 = rref(std::move(a13)); // expected-warning {{uninitialized}}
956 A a14 = std::move(x ? a13 : (22, a14)); // expected-warning {{uninitialized}}
957 };
958 D d;
959 struct E {
960 A a1 = a1;
961 A a2 = a2.get();
962 A a3 = a3.num();
963 A a4 = a4.copy(a4);
964 A a5 = a5.something(a5);
965 A a6 = ref(a6);
966 A a7 = const_ref(a7);
967 A a8 = pointer(&a8);
968 A a9 = normal(a9);
969 const A a10 = a10;
970 A a11 = std::move(a11);
971 A a12 = A(std::move(a12));
972 A a13 = rref(std::move(a13));
973 A a14 = std::move(x ? a13 : (22, a14));
974 };
975 }
976
977 namespace cross_field_warnings {
978 struct A {
979 int a, b;
Across_field_warnings::A980 A() {}
Across_field_warnings::A981 A(char (*)[1]) : b(a) {} // expected-warning{{field 'a' is uninitialized when used here}}
Across_field_warnings::A982 A(char (*)[2]) : a(b) {} // expected-warning{{field 'b' is uninitialized when used here}}
983 };
984
985 struct B {
986 int a = b; // expected-warning{{field 'b' is uninitialized when used here}}
987 int b;
Bcross_field_warnings::B988 B() {} // expected-note{{during field initialization in this constructor}}
989 };
990
991 struct C {
992 int a;
993 int b = a; // expected-warning{{field 'a' is uninitialized when used here}}
Ccross_field_warnings::C994 C(char (*)[1]) : a(5) {}
Ccross_field_warnings::C995 C(char (*)[2]) {} // expected-note{{during field initialization in this constructor}}
996 };
997
998 struct D {
999 int a;
1000 int &b;
1001 int &c = a;
1002 int d = b;
Dcross_field_warnings::D1003 D() : b(a) {}
1004 };
1005
1006 struct E {
1007 int a;
1008 int get();
1009 static int num();
Ecross_field_warnings::E1010 E() {}
Ecross_field_warnings::E1011 E(int) {}
1012 };
1013
1014 struct F {
1015 int a;
1016 E e;
1017 int b;
Fcross_field_warnings::F1018 F(char (*)[1]) : a(e.get()) {} // expected-warning{{field 'e' is uninitialized when used here}}
Fcross_field_warnings::F1019 F(char (*)[2]) : a(e.num()) {}
Fcross_field_warnings::F1020 F(char (*)[3]) : e(a) {} // expected-warning{{field 'a' is uninitialized when used here}}
Fcross_field_warnings::F1021 F(char (*)[4]) : a(4), e(a) {}
Fcross_field_warnings::F1022 F(char (*)[5]) : e(b) {} // expected-warning{{field 'b' is uninitialized when used here}}
Fcross_field_warnings::F1023 F(char (*)[6]) : e(b), b(4) {} // expected-warning{{field 'b' is uninitialized when used here}}
1024 };
1025
1026 struct G {
Gcross_field_warnings::G1027 G(const A&) {};
1028 };
1029
1030 struct H {
1031 A a1;
1032 G g;
1033 A a2;
Hcross_field_warnings::H1034 H() : g(a1) {}
Hcross_field_warnings::H1035 H(int) : g(a2) {}
1036 };
1037
1038 struct I {
Icross_field_warnings::I1039 I(int*) {}
1040 };
1041
1042 struct J : public I {
1043 int *a;
1044 int *b;
1045 int c;
Jcross_field_warnings::J1046 J() : I((a = new int(5))), b(a), c(*a) {}
1047 };
1048
1049 struct K {
1050 int a = (b = 5);
1051 int b = b + 5;
1052 };
1053
1054 struct L {
1055 int a = (b = 5);
1056 int b = b + 5; // expected-warning{{field 'b' is uninitialized when used here}}
Lcross_field_warnings::L1057 L() : a(5) {} // expected-note{{during field initialization in this constructor}}
1058 };
1059
1060 struct M { };
1061
1062 struct N : public M {
1063 int a;
1064 int b;
Ncross_field_warnings::N1065 N() : b(a) { } // expected-warning{{field 'a' is uninitialized when used here}}
1066 };
1067
1068 struct O {
1069 int x = 42;
getcross_field_warnings::O1070 int get() { return x; }
1071 };
1072
1073 struct P {
1074 O o;
1075 int x = o.get();
Pcross_field_warnings::P1076 P() : x(o.get()) { }
1077 };
1078
1079 struct Q {
1080 int a;
1081 int b;
1082 int &c;
Qcross_field_warnings::Q1083 Q() :
1084 a(c = 5), // expected-warning{{reference 'c' is not yet bound to a value when used here}}
1085 b(c), // expected-warning{{reference 'c' is not yet bound to a value when used here}}
1086 c(a) {}
1087 };
1088
1089 struct R {
1090 int a;
1091 int b;
1092 int c;
1093 int d = a + b + c;
Rcross_field_warnings::R1094 R() : a(c = 5), b(c), c(a) {}
1095 };
1096
1097 // FIXME: Use the CFG-based analysis to give a sometimes uninitialized
1098 // warning on y.
1099 struct T {
1100 int x;
1101 int y;
Tcross_field_warnings::T1102 T(bool b)
1103 : x(b ? (y = 5) : (1 + y)), // expected-warning{{field 'y' is uninitialized when used here}}
1104 y(y + 1) {}
Tcross_field_warnings::T1105 T(int b)
1106 : x(!b ? (1 + y) : (y = 5)), // expected-warning{{field 'y' is uninitialized when used here}}
1107 y(y + 1) {}
1108 };
1109
1110 }
1111
1112 namespace base_class {
1113 struct A {
Abase_class::A1114 A (int) {}
1115 };
1116
1117 struct B : public A {
1118 int x;
Bbase_class::B1119 B() : A(x) {} // expected-warning{{field 'x' is uninitialized when used here}}
1120 };
1121
1122 struct C : public A {
1123 int x;
1124 int y;
Cbase_class::C1125 C() : A(y = 4), x(y) {}
1126 };
1127 }
1128
1129 namespace delegating_constructor {
1130 struct A {
1131 A(int);
1132 A(int&, int);
1133
Adelegating_constructor::A1134 A(char (*)[1]) : A(x) {}
1135 // expected-warning@-1 {{field 'x' is uninitialized when used here}}
Adelegating_constructor::A1136 A(char (*)[2]) : A(x, x) {}
1137 // expected-warning@-1 {{field 'x' is uninitialized when used here}}
1138
Adelegating_constructor::A1139 A(char (*)[3]) : A(x, 0) {}
1140
1141 int x;
1142 };
1143 }
1144
1145 namespace init_list {
1146 int num = 5;
1147 struct A { int i1, i2; };
1148 struct B { A a1, a2; };
1149
1150 A a1{1,2};
1151 A a2{a2.i1 + 2}; // expected-warning{{uninitialized}}
1152 A a3 = {a3.i1 + 2}; // expected-warning{{uninitialized}}
1153 A a4 = A{a4.i2 + 2}; // expected-warning{{uninitialized}}
1154
1155 B b1 = { {}, {} };
1156 B b2 = { {}, b2.a1 };
1157 B b3 = { b3.a1 }; // expected-warning{{uninitialized}}
1158 B b4 = { {}, b4.a2} ; // expected-warning{{uninitialized}}
1159 B b5 = { b5.a2 }; // expected-warning{{uninitialized}}
1160
1161 B b6 = { {b6.a1.i1} }; // expected-warning{{uninitialized}}
1162 B b7 = { {0, b7.a1.i1} };
1163 B b8 = { {}, {b8.a1.i1} };
1164 B b9 = { {}, {0, b9.a1.i1} };
1165
1166 B b10 = { {b10.a1.i2} }; // expected-warning{{uninitialized}}
1167 B b11 = { {0, b11.a1.i2} }; // expected-warning{{uninitialized}}
1168 B b12 = { {}, {b12.a1.i2} };
1169 B b13 = { {}, {0, b13.a1.i2} };
1170
1171 B b14 = { {b14.a2.i1} }; // expected-warning{{uninitialized}}
1172 B b15 = { {0, b15.a2.i1} }; // expected-warning{{uninitialized}}
1173 B b16 = { {}, {b16.a2.i1} }; // expected-warning{{uninitialized}}
1174 B b17 = { {}, {0, b17.a2.i1} };
1175
1176 B b18 = { {b18.a2.i2} }; // expected-warning{{uninitialized}}
1177 B b19 = { {0, b19.a2.i2} }; // expected-warning{{uninitialized}}
1178 B b20 = { {}, {b20.a2.i2} }; // expected-warning{{uninitialized}}
1179 B b21 = { {}, {0, b21.a2.i2} }; // expected-warning{{uninitialized}}
1180
1181 B b22 = { {b18.a2.i2 + 5} };
1182
1183 struct C {int a; int& b; int c; };
1184 C c1 = { 0, num, 0 };
1185 C c2 = { 1, num, c2.b };
1186 C c3 = { c3.b, num }; // expected-warning{{uninitialized}}
1187 C c4 = { 0, c4.b, 0 }; // expected-warning{{uninitialized}}
1188 C c5 = { 0, c5.c, 0 };
1189 C c6 = { c6.b, num, 0 }; // expected-warning{{uninitialized}}
1190 C c7 = { 0, c7.a, 0 };
1191
1192 struct D {int &a; int &b; };
1193 D d1 = { num, num };
1194 D d2 = { num, d2.a };
1195 D d3 = { d3.b, num }; // expected-warning{{uninitialized}}
1196
1197 // Same as above in member initializer form.
1198 struct Awrapper {
1199 A a1{1,2};
1200 A a2{a2.i1 + 2}; // expected-warning{{uninitialized}}
1201 A a3 = {a3.i1 + 2}; // expected-warning{{uninitialized}}
1202 A a4 = A{a4.i2 + 2}; // expected-warning{{uninitialized}}
Awrapperinit_list::Awrapper1203 Awrapper() {} // expected-note 3{{in this constructor}}
Awrapperinit_list::Awrapper1204 Awrapper(int) :
1205 a1{1,2},
1206 a2{a2.i1 + 2}, // expected-warning{{uninitialized}}
1207 a3{a3.i1 + 2}, // expected-warning{{uninitialized}}
1208 a4{a4.i2 + 2} // expected-warning{{uninitialized}}
1209 {}
1210 };
1211
1212 struct Bwrapper {
1213 B b1 = { {}, {} };
1214 B b2 = { {}, b2.a1 };
1215 B b3 = { b3.a1 }; // expected-warning{{uninitialized}}
1216 B b4 = { {}, b4.a2} ; // expected-warning{{uninitialized}}
1217 B b5 = { b5.a2 }; // expected-warning{{uninitialized}}
1218
1219 B b6 = { {b6.a1.i1} }; // expected-warning{{uninitialized}}
1220 B b7 = { {0, b7.a1.i1} };
1221 B b8 = { {}, {b8.a1.i1} };
1222 B b9 = { {}, {0, b9.a1.i1} };
1223
1224 B b10 = { {b10.a1.i2} }; // expected-warning{{uninitialized}}
1225 B b11 = { {0, b11.a1.i2} }; // expected-warning{{uninitialized}}
1226 B b12 = { {}, {b12.a1.i2} };
1227 B b13 = { {}, {0, b13.a1.i2} };
1228
1229 B b14 = { {b14.a2.i1} }; // expected-warning{{uninitialized}}
1230 B b15 = { {0, b15.a2.i1} }; // expected-warning{{uninitialized}}
1231 B b16 = { {}, {b16.a2.i1} }; // expected-warning{{uninitialized}}
1232 B b17 = { {}, {0, b17.a2.i1} };
1233
1234 B b18 = { {b18.a2.i2} }; // expected-warning{{uninitialized}}
1235 B b19 = { {0, b19.a2.i2} }; // expected-warning{{uninitialized}}
1236 B b20 = { {}, {b20.a2.i2} }; // expected-warning{{uninitialized}}
1237 B b21 = { {}, {0, b21.a2.i2} }; // expected-warning{{uninitialized}}
1238
1239 B b22 = { {b18.a2.i2 + 5} };
Bwrapperinit_list::Bwrapper1240 Bwrapper() {} // expected-note 13{{in this constructor}}
Bwrapperinit_list::Bwrapper1241 Bwrapper(int) :
1242 b1{ {}, {} },
1243 b2{ {}, b2.a1 },
1244 b3{ b3.a1 }, // expected-warning{{uninitialized}}
1245 b4{ {}, b4.a2}, // expected-warning{{uninitialized}}
1246 b5{ b5.a2 }, // expected-warning{{uninitialized}}
1247
1248 b6{ {b6.a1.i1} }, // expected-warning{{uninitialized}}
1249 b7{ {0, b7.a1.i1} },
1250 b8{ {}, {b8.a1.i1} },
1251 b9{ {}, {0, b9.a1.i1} },
1252
1253 b10{ {b10.a1.i2} }, // expected-warning{{uninitialized}}
1254 b11{ {0, b11.a1.i2} }, // expected-warning{{uninitialized}}
1255 b12{ {}, {b12.a1.i2} },
1256 b13{ {}, {0, b13.a1.i2} },
1257
1258 b14{ {b14.a2.i1} }, // expected-warning{{uninitialized}}
1259 b15{ {0, b15.a2.i1} }, // expected-warning{{uninitialized}}
1260 b16{ {}, {b16.a2.i1} }, // expected-warning{{uninitialized}}
1261 b17{ {}, {0, b17.a2.i1} },
1262
1263 b18{ {b18.a2.i2} }, // expected-warning{{uninitialized}}
1264 b19{ {0, b19.a2.i2} }, // expected-warning{{uninitialized}}
1265 b20{ {}, {b20.a2.i2} }, // expected-warning{{uninitialized}}
1266 b21{ {}, {0, b21.a2.i2} }, // expected-warning{{uninitialized}}
1267
1268 b22{ {b18.a2.i2 + 5} }
1269 {}
1270 };
1271
1272 struct Cwrapper {
1273 C c1 = { 0, num, 0 };
1274 C c2 = { 1, num, c2.b };
1275 C c3 = { c3.b, num }; // expected-warning{{uninitialized}}
1276 C c4 = { 0, c4.b, 0 }; // expected-warning{{uninitialized}}
1277 C c5 = { 0, c5.c, 0 };
1278 C c6 = { c6.b, num, 0 }; // expected-warning{{uninitialized}}
1279 C c7 = { 0, c7.a, 0 };
1280
Cwrapperinit_list::Cwrapper1281 Cwrapper() {} // expected-note 3{{in this constructor}}
Cwrapperinit_list::Cwrapper1282 Cwrapper(int) :
1283 c1{ 0, num, 0 },
1284 c2{ 1, num, c2.b },
1285 c3{ c3.b, num }, // expected-warning{{uninitialized}}
1286 c4{ 0, c4.b, 0 }, // expected-warning{{uninitialized}}
1287 c5{ 0, c5.c, 0 },
1288 c6{ c6.b, num, 0 }, // expected-warning{{uninitialized}}
1289 c7{ 0, c7.a, 0 }
1290 {}
1291 };
1292
1293 struct Dwrapper {
1294 D d1 = { num, num };
1295 D d2 = { num, d2.a };
1296 D d3 = { d3.b, num }; // expected-warning{{uninitialized}}
Dwrapperinit_list::Dwrapper1297 Dwrapper() {} // expected-note{{in this constructor}}
Dwrapperinit_list::Dwrapper1298 Dwrapper(int) :
1299 d1{ num, num },
1300 d2{ num, d2.a },
1301 d3{ d3.b, num } // expected-warning{{uninitialized}}
1302 {}
1303 };
1304 }
1305
1306 namespace template_class {
1307 class Foo {
1308 public:
Create()1309 int *Create() { return nullptr; }
1310 };
1311
1312 template <typename T>
1313 class A {
1314 public:
1315 // Don't warn on foo here.
A()1316 A() : ptr(foo->Create()) {}
1317
1318 private:
1319 Foo *foo = new Foo;
1320 int *ptr;
1321 };
1322
1323 template <typename T>
1324 class B {
1325 public:
1326 // foo is uninitialized here, but class B is never instantiated.
B()1327 B() : ptr(foo->Create()) {}
1328
1329 private:
1330 Foo *foo;
1331 int *ptr;
1332 };
1333
1334 template <typename T>
1335 class C {
1336 public:
C()1337 C() : ptr(foo->Create()) {}
1338 // expected-warning@-1 {{field 'foo' is uninitialized when used here}}
1339 private:
1340 Foo *foo;
1341 int *ptr;
1342 };
1343
1344 C<int> c;
1345 // expected-note@-1 {{in instantiation of member function 'template_class::C<int>::C' requested here}}
1346
1347 }
1348
1349 namespace base_class_access {
1350 struct A {
1351 A();
1352 A(int);
1353
1354 int i;
1355 int foo();
1356
1357 static int bar();
1358 };
1359
1360 struct B : public A {
Bbase_class_access::B1361 B(int (*)[1]) : A() {}
Bbase_class_access::B1362 B(int (*)[2]) : A(bar()) {}
1363
Bbase_class_access::B1364 B(int (*)[3]) : A(i) {}
1365 // expected-warning@-1 {{base class 'base_class_access::A' is uninitialized when used here to access 'base_class_access::A::i'}}
1366
Bbase_class_access::B1367 B(int (*)[4]) : A(foo()) {}
1368 // expected-warning@-1 {{base_class_access::A' is uninitialized when used here to access 'base_class_access::A::foo'}}
1369 };
1370
1371 struct C {
Cbase_class_access::C1372 C(int) {}
1373 };
1374
1375 struct D : public C, public A {
Dbase_class_access::D1376 D(int (*)[1]) : C(0) {}
Dbase_class_access::D1377 D(int (*)[2]) : C(bar()) {}
1378
Dbase_class_access::D1379 D(int (*)[3]) : C(i) {}
1380 // expected-warning@-1 {{base class 'base_class_access::A' is uninitialized when used here to access 'base_class_access::A::i'}}
1381
Dbase_class_access::D1382 D(int (*)[4]) : C(foo()) {}
1383 // expected-warning@-1 {{base_class_access::A' is uninitialized when used here to access 'base_class_access::A::foo'}}
1384 };
1385
1386 }
1387
1388 namespace value {
1389 template <class T> T move(T t);
1390 template <class T> T notmove(T t);
1391 }
1392 namespace lvalueref {
1393 template <class T> T move(T& t);
1394 template <class T> T notmove(T& t);
1395 }
1396 namespace rvalueref {
1397 template <class T> T move(T&& t);
1398 template <class T> T notmove(T&& t);
1399 }
1400
1401 namespace move_test {
1402 int a1 = std::move(a1); // expected-warning {{uninitialized}}
1403 int a2 = value::move(a2); // expected-warning {{uninitialized}}
1404 int a3 = value::notmove(a3); // expected-warning {{uninitialized}}
1405 int a4 = lvalueref::move(a4);
1406 int a5 = lvalueref::notmove(a5);
1407 int a6 = rvalueref::move(a6);
1408 int a7 = rvalueref::notmove(a7);
1409
test()1410 void test() {
1411 int a1 = std::move(a1); // expected-warning {{uninitialized}}
1412 int a2 = value::move(a2); // expected-warning {{uninitialized}}
1413 int a3 = value::notmove(a3); // expected-warning {{uninitialized}}
1414 int a4 = lvalueref::move(a4);
1415 int a5 = lvalueref::notmove(a5);
1416 int a6 = rvalueref::move(a6);
1417 int a7 = rvalueref::notmove(a7);
1418 }
1419
1420 class A {
1421 int a;
A(int (*)[1])1422 A(int (*) [1]) : a(std::move(a)) {} // expected-warning {{uninitialized}}
A(int (*)[2])1423 A(int (*) [2]) : a(value::move(a)) {} // expected-warning {{uninitialized}}
A(int (*)[3])1424 A(int (*) [3]) : a(value::notmove(a)) {} // expected-warning {{uninitialized}}
A(int (*)[4])1425 A(int (*) [4]) : a(lvalueref::move(a)) {}
A(int (*)[5])1426 A(int (*) [5]) : a(lvalueref::notmove(a)) {}
A(int (*)[6])1427 A(int (*) [6]) : a(rvalueref::move(a)) {}
A(int (*)[7])1428 A(int (*) [7]) : a(rvalueref::notmove(a)) {}
1429 };
1430 }
1431
array_capture(bool b)1432 void array_capture(bool b) {
1433 const char fname[] = "array_capture";
1434 if (b) {
1435 int unused; // expected-warning {{unused variable}}
1436 } else {
1437 [fname]{};
1438 }
1439 }
1440