1// RUN: %clang_cc1 -fsyntax-only -Wall -Wunused-macros -Wunused-parameter -Wno-uninitialized -verify %s
2
3// rdar://8365684
4struct S {
5    void m1() { int b; while (b==b); } // expected-warning {{always evaluates to true}}
6
7#pragma clang diagnostic push
8#pragma clang diagnostic ignored "-Wtautological-compare"
9    void m2() { int b; while (b==b); }
10#pragma clang diagnostic pop
11
12    void m3() { int b; while (b==b); } // expected-warning {{always evaluates to true}}
13};
14
15//------------------------------------------------------------------------------
16
17#pragma clang diagnostic push
18#pragma clang diagnostic ignored "-Wtautological-compare"
19template <typename T>
20struct TS {
21    void m() { T b; while (b==b); }
22};
23#pragma clang diagnostic pop
24
25void f() {
26    TS<int> ts;
27    ts.m();
28}
29
30//------------------------------------------------------------------------------
31
32#define UNUSED_MACRO1 // expected-warning {{macro is not used}}
33
34#pragma clang diagnostic push
35#pragma clang diagnostic ignored "-Wunused-macros"
36#define UNUSED_MACRO2
37#pragma clang diagnostic pop
38
39//------------------------------------------------------------------------------
40
41#pragma clang diagnostic push
42#pragma clang diagnostic ignored "-Wreturn-type"
43int g() { }
44#pragma clang diagnostic pop
45
46//------------------------------------------------------------------------------
47
48void ww(
49#pragma clang diagnostic push
50#pragma clang diagnostic ignored "-Wunused-parameter"
51        int x,
52#pragma clang diagnostic pop
53        int y) // expected-warning {{unused}}
54{
55}
56
57//------------------------------------------------------------------------------
58
59struct S2 {
60    int x, y;
61    S2() :
62#pragma clang diagnostic push
63#pragma clang diagnostic ignored "-Wreorder"
64    y(),
65    x()
66#pragma clang diagnostic pop
67    {}
68};
69
70//------------------------------------------------------------------------------
71
72// rdar://8790245
73#define MYMACRO \
74    _Pragma("clang diagnostic push") \
75    _Pragma("clang diagnostic ignored \"-Wunknown-pragmas\"") \
76    _Pragma("clang diagnostic pop")
77MYMACRO
78#undef MYMACRO
79
80//------------------------------------------------------------------------------
81