return-noreturn.c revision 7a128e84006fdabfda4b8bd04f09c2739ed7f824 
1// RUN: clang-cc %s -fsyntax-only -verify -fblocks -Wmissing-noreturn
2
3int j;
4void test1() { // expected-warning {{function could be attribute 'noreturn'}}
5  ^ (void) { while (1) { } }(); // expected-warning {{block could be attribute 'noreturn'}}
6  ^ (void) { if (j) while (1) { } }();
7  while (1) { }
8}
9
10void test2() {
11  if (j) while (1) { }
12}
13
14__attribute__((__noreturn__))
15void 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.
22extern int foo_test_3();
23__attribute__((__noreturn__)) void* test3(int arg) {
24  while (1) foo_test_3();
25}
26
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.
34void __attribute__((noreturn))
35test4() {
36  test2_positive();
37}
38