1 // RUN: %clang_cc1 %s -fsyntax-only -verify -triple %itanium_abi_triple
2 // RUN: %clang_cc1 %s -fsyntax-only -verify -triple %ms_abi_triple -DMSABI
3 
4 enum Foo { FooA, FooB, FooC };
5 enum Bar { BarD, BarE, BarF };
6 enum { AnonAA = 42, AnonAB = 43 };
7 enum { AnonBA = 44, AnonBB = 45 };
8 enum { Anon1, Anon2, Anon3 };
9 typedef enum { TD1, TD2 } TD;
10 
11 namespace name1 {
12   enum Foo {F1, F2, F3};
13   enum Baz {B1, B2, B3};
14 }
15 
16 namespace name2 {
17   enum Baz {B1, B2, B3};
18 }
19 
20 using name1::Baz;
21 using name1::B1;
22 using name2::B2;
23 typedef name1::Foo oneFoo;
24 typedef name1::Foo twoFoo;
25 Foo getFoo();
26 Bar getBar();
27 
28 void test () {
29   Foo x = FooA;
30   Bar y = BarD;
31   Baz z = name1::B3;
32   name1::Foo a;
33   oneFoo b;
34   twoFoo c;
35   TD td;
36 
37   while (x == FooA);
38   while (y == BarD);
39   while (a == name1::F1);
40   while (z == name1::B2);
41   while (a == b);
42   while (a == c);
43   while (b == c);
44   while (B1 == name1::B2);
45   while (B2 == name2::B1);
46 #ifndef MSABI
47   while (x == AnonAA); // expected-warning {{comparison of constant 'AnonAA' (42) with expression of type 'Foo' is always false}}
48   while (AnonBB == y); // expected-warning {{comparison of constant 'AnonBB' (45) with expression of type 'Bar' is always false}}
49 #endif
50   while (AnonAA == AnonAB);
51   while (AnonAB == AnonBA);
52   while (AnonBB == AnonAA);
53 
54   while ((x) == FooA);
55   while ((y) == BarD);
56   while ((a) == name1::F1);
57   while (z == (name1::B2));
58   while (a == (b));
59   while (a == (c));
60   while ((b) == (c));
61   while ((B1) == (name1::B2));
62   while ((B2) == (name2::B1));
63 
64   while (((x)) == FooA);
65   while ((y) == (BarD));
66   while ((a) == (name1::F1));
67   while (z == (name1::B2));
68   while ((a) == ((((b)))));
69   while (((a)) == (c));
70   while ((b) == (((c))));
71   while ((((((B1))))) == (((name1::B2))));
72   while (B2 == ((((((name2::B1)))))));
73 
74   while (td == Anon1);
75 #ifndef MSABI
76   while (td == AnonAA);  // expected-warning {{comparison of constant 'AnonAA' (42) with expression of type 'TD' is always false}}
77 #endif
78 
79   while (B1 == B2); // expected-warning  {{comparison of different enumeration types ('name1::Baz' and 'name2::Baz')}}
80   while (name1::B2 == name2::B3); // expected-warning  {{comparison of different enumeration types ('name1::Baz' and 'name2::Baz')}}
81   while (z == name2::B2); // expected-warning  {{comparison of different enumeration types ('name1::Baz' and 'name2::Baz')}}
82 
83   while (((((B1)))) == B2); // expected-warning  {{comparison of different enumeration types ('name1::Baz' and 'name2::Baz')}}
84   while (name1::B2 == (name2::B3)); // expected-warning  {{comparison of different enumeration types ('name1::Baz' and 'name2::Baz')}}
85   while (z == ((((name2::B2))))); // expected-warning  {{comparison of different enumeration types ('name1::Baz' and 'name2::Baz')}}
86 
87   while ((((B1))) == (((B2)))); // expected-warning  {{comparison of different enumeration types ('name1::Baz' and 'name2::Baz')}}
88   while ((name1::B2) == (((name2::B3)))); // expected-warning  {{comparison of different enumeration types ('name1::Baz' and 'name2::Baz')}}
89   while ((((z))) == (name2::B2)); // expected-warning  {{comparison of different enumeration types ('name1::Baz' and 'name2::Baz')}}
90 
91   while (x == a); // expected-warning  {{comparison of different enumeration types ('Foo' and 'name1::Foo')}}
92   while (x == b); // expected-warning  {{comparison of different enumeration types ('Foo' and 'oneFoo' (aka 'name1::Foo'))}}
93   while (x == c); // expected-warning  {{comparison of different enumeration types ('Foo' and 'twoFoo' (aka 'name1::Foo'))}}
94 
95   while (x == y); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
96   while (x != y); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
97   while (x >= y); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
98   while (x <= y); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
99   while (x > y); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
100   while (x < y); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
101 
102   while (FooB == y); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
103   while (FooB != y); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
104   while (FooB >= y); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
105   while (FooB <= y); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
106   while (FooB > y); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
107   while (FooB < y); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
108 
109   while (FooB == BarD); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
110   while (FooB != BarD); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
111   while (FooB >= BarD); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
112   while (FooB <= BarD); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
113   while (FooB > BarD); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
114   while (FooB < BarD); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
115 
116   while (x == BarD); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
117   while (x != BarD); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
118   while (x >= BarD); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
119   while (x <= BarD); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
120   while (x > BarD); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
121   while (x < BarD); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
122 
123   while (getFoo() == y); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
124   while (getFoo() != y); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
125   while (getFoo() >= y); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
126   while (getFoo() <= y); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
127   while (getFoo() > y); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
128   while (getFoo() < y); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
129 
130   while (getFoo() == BarD); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
131   while (getFoo() != BarD); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
132   while (getFoo() >= BarD); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
133   while (getFoo() <= BarD); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
134   while (getFoo() > BarD); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
135   while (getFoo() < BarD); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
136 
137   while (getFoo() == getBar()); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
138   while (getFoo() != getBar()); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
139   while (getFoo() >= getBar()); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
140   while (getFoo() <= getBar()); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
141   while (getFoo() > getBar()); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
142   while (getFoo() < getBar()); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
143 
144   while (FooB == getBar()); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
145   while (FooB != getBar()); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
146   while (FooB >= getBar()); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
147   while (FooB <= getBar()); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
148   while (FooB > getBar()); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
149   while (FooB < getBar()); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
150 
151   while (x == getBar()); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
152   while (x != getBar()); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
153   while (x >= getBar()); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
154   while (x <= getBar()); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
155   while (x > getBar()); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
156   while (x < getBar()); // expected-warning  {{comparison of different enumeration types ('Foo' and 'Bar')}}
157 
158 
159 
160   while (y == x); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
161   while (y != x); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
162   while (y >= x); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
163   while (y <= x); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
164   while (y > x); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
165   while (y < x); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
166 
167   while (y == FooB); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
168   while (y != FooB); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
169   while (y >= FooB); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
170   while (y <= FooB); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
171   while (y > FooB); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
172   while (y < FooB); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
173 
174   while (BarD == FooB); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
175   while (BarD != FooB); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
176   while (BarD >= FooB); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
177   while (BarD <= FooB); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
178   while (BarD > FooB); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
179   while (BarD <FooB); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
180 
181   while (BarD == x); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
182   while (BarD != x); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
183   while (BarD >= x); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
184   while (BarD <= x); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
185   while (BarD < x); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
186   while (BarD > x); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
187 
188   while (y == getFoo()); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
189   while (y != getFoo()); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
190   while (y >= getFoo()); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
191   while (y <= getFoo()); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
192   while (y > getFoo()); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
193   while (y < getFoo()); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
194 
195   while (BarD == getFoo()); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
196   while (BarD != getFoo()); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
197   while (BarD >= getFoo()); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
198   while (BarD <= getFoo()); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
199   while (BarD > getFoo()); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
200   while (BarD < getFoo()); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
201 
202   while (getBar() == getFoo()); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
203   while (getBar() != getFoo()); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
204   while (getBar() >= getFoo()); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
205   while (getBar() <= getFoo()); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
206   while (getBar() > getFoo()); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
207   while (getBar() < getFoo()); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
208 
209   while (getBar() == FooB); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
210   while (getBar() != FooB); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
211   while (getBar() >= FooB); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
212   while (getBar() <= FooB); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
213   while (getBar() > FooB); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
214   while (getBar() < FooB); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
215 
216   while (getBar() == x); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
217   while (getBar() != x); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
218   while (getBar() >= x); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
219   while (getBar() <= x); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
220   while (getBar() > x); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
221   while (getBar() < x); // expected-warning  {{comparison of different enumeration types ('Bar' and 'Foo')}}
222 
223   while (td == FooA); // expected-warning  {{comparison of different enumeration types ('TD' and 'Foo')}}
224   while (td == BarD); // expected-warning  {{comparison of different enumeration types ('TD' and 'Bar')}}
225   while (name1::F1 == td); // expected-warning  {{comparison of different enumeration types ('name1::Foo' and 'TD')}}
226   while (name2::B1 == td); // expected-warning  {{comparison of different enumeration types ('name2::Baz' and 'TD')}}
227   while (td == a); // expected-warning  {{comparison of different enumeration types ('TD' and 'name1::Foo')}}
228   while (td == b); // expected-warning  {{comparison of different enumeration types ('TD' and 'oneFoo' (aka 'name1::Foo'))}}
229   while (td == c); // expected-warning  {{comparison of different enumeration types ('TD' and 'twoFoo' (aka 'name1::Foo'))}}
230   while (td == x); // expected-warning  {{comparison of different enumeration types ('TD' and 'Foo')}}
231   while (td == y); // expected-warning  {{comparison of different enumeration types ('TD' and 'Bar')}}
232   while (td == z); // expected-warning  {{comparison of different enumeration types ('TD' and 'name1::Baz')}}
233 
234   while (a == TD1); // expected-warning  {{comparison of different enumeration types ('name1::Foo' and 'TD')}}
235   while (b == TD2); // expected-warning  {{comparison of different enumeration types ('oneFoo' (aka 'name1::Foo') and 'TD')}}
236   while (c == TD1); // expected-warning  {{comparison of different enumeration types ('twoFoo' (aka 'name1::Foo') and 'TD')}}
237   while (x == TD2); // expected-warning  {{comparison of different enumeration types ('Foo' and 'TD')}}
238   while (y == TD1); // expected-warning  {{comparison of different enumeration types ('Bar' and 'TD')}}
239   while (z == TD2); // expected-warning  {{comparison of different enumeration types ('name1::Baz' and 'TD')}}
240 
241   switch (a) {
242     case name1::F1: break;
243     case name1::F3: break;
244     case name2::B2: break; // expected-warning {{comparison of different enumeration types in switch statement ('name1::Foo' and 'name2::Baz')}}
245   }
246 
247   switch (x) {
248     case FooB: break;
249     case FooC: break;
250     case BarD: break; // expected-warning {{comparison of different enumeration types in switch statement ('Foo' and 'Bar')}}
251   }
252 
253   switch(getBar()) {
254     case BarE: break;
255     case BarF: break;
256     case FooA: break; // expected-warning {{comparison of different enumeration types in switch statement ('Bar' and 'Foo')}}
257   }
258 
259   switch(x) {
260     case AnonAA: break; // expected-warning {{case value not in enumerated type 'Foo'}}
261     case FooA: break;
262     case FooB: break;
263     case FooC: break;
264   }
265 
266   switch (td) {
267     case TD1: break;
268     case FooB: break; // expected-warning {{comparison of different enumeration types in switch statement ('TD' and 'Foo')}}
269     case BarF: break; // expected-warning {{comparison of different enumeration types in switch statement ('TD' and 'Bar')}}
270     // expected-warning@-1 {{case value not in enumerated type 'TD'}}
271     case AnonAA: break; // expected-warning {{case value not in enumerated type 'TD'}}
272   }
273 
274   switch (td) {
275     case Anon1: break;
276     case TD2: break;
277   }
278 
279   switch (a) {
280     case TD1: break; // expected-warning {{comparison of different enumeration types in switch statement ('name1::Foo' and 'TD')}}
281     case TD2: break; // expected-warning {{comparison of different enumeration types in switch statement ('name1::Foo' and 'TD')}}
282     case name1::F3: break;
283   }
284 }
285