1 /* Test for a bogus warning on comparison between signed and unsigned.
2 This was inspired by code in gcc. This testcase is identical to
3 compare9.c except that we use -fno-short-enums here and expect a
4 warning from case 4. */
5
6 /* { dg-do compile } */
7 /* { dg-options "-fno-short-enums -Wsign-compare" } */
8
9 int tf = 1;
10
11 /* This enumeration has an explicit negative value and is therefore signed. */
12 enum mm1
13 {
14 VOID, SI, DI, MAX = -1
15 };
16
17 /* This enumeration fits entirely in a signed int, but is unsigned anyway. */
18 enum mm2
19 {
20 VOID2, SI2, DI2, MAX2
21 };
22
f(enum mm1 x)23 int f(enum mm1 x)
24 {
25 return x == (tf?DI:SI); /* { dg-bogus "changes signedness" "case 1" } */
26 }
27
g(enum mm1 x)28 int g(enum mm1 x)
29 {
30 return x == (tf?DI:-1); /* { dg-bogus "changes signedness" "case 2" } */
31 }
32
h(enum mm2 x)33 int h(enum mm2 x)
34 {
35 return x == (tf?DI2:SI2); /* { dg-bogus "changes signedness" "case 3" } */
36 }
37
i(enum mm2 x)38 int i(enum mm2 x)
39 {
40 return x == (tf?DI2:-1); /* { dg-warning "different signedness" "case 4" } */
41 }
42