1 // RUN: %clang_cc1 %s -fsyntax-only -verify -fblocks -Wmissing-noreturn -Wno-unreachable-code
2 
3 int j;
test1()4 void test1() { // expected-warning {{function 'test1' could be declared with attribute 'noreturn'}}
5   ^ (void) { while (1) { } }();
6   ^ (void) { if (j) while (1) { } }();
7   while (1) { }
8 }
9 
test2()10 void test2() {
11   if (j) while (1) { }
12 }
13 
14 __attribute__((__noreturn__))
test2_positive()15 void test2_positive() {
16   if (j) while (1) { }
17 } // expected-warning{{function declared 'noreturn' should not return}}
18 
19 
20 // This test case illustrates that we don't warn about the missing return
21 // because the function is marked noreturn and there is an infinite loop.
22 extern int foo_test_3();
test3(int arg)23 __attribute__((__noreturn__)) void* test3(int arg) {
24   while (1) foo_test_3();
25 }
26 
test3_positive(int arg)27 __attribute__((__noreturn__)) void* test3_positive(int arg) {
28   while (0) foo_test_3();
29 } // expected-warning{{function declared 'noreturn' should not return}}
30 
31 
32 // PR5298 - -Wmissing-noreturn shouldn't warn if the function is already
33 // declared noreturn.
34 void __attribute__((noreturn))
test4()35 test4() {
36   test2_positive();
37 }
38 
39 // Do not warn here.
test5()40 _Noreturn void test5() {
41   test2_positive();
42 }
43 
44 // rdar://16274746
test6()45 void test6()
46 {
47     (void)^{
48        for(;;)
49         ;
50      };
51 }
52 
53