|
111
|
1 /* Test for a bogus warning on comparison between signed and unsigned.
|
|
|
2 Origin: Kaveh R. Ghazi <ghazi@caip.rutgers.edu> 5/13/2001. */
|
|
|
3
|
|
|
4 /* { dg-do compile } */
|
|
|
5 /* { dg-options "-fshow-column -Wsign-compare -fstrict-overflow" } */
|
|
|
6
|
|
|
7 extern void bar(void);
|
|
|
8
|
|
|
9 int foo(int x, int y, unsigned u)
|
|
|
10 {
|
|
|
11 /* A COMPOUND_EXPR is non-negative if the last element is known to
|
|
|
12 be non-negative. */
|
|
|
13 if (u < (bar(), -1)) /*{ dg-warning "9:different signedness" "COMPOUND_EXPR" }*/
|
|
|
14 return x;
|
|
|
15 if (u < (bar(), 10))
|
|
|
16 return x;
|
|
|
17 if ((bar(), 10) < u)
|
|
|
18 return x;
|
|
|
19 if (u < (x ? (bar(),bar(),bar(),bar(),x==y) : 10))
|
|
|
20 return x;
|
|
|
21 if ((x ? 10 : (bar(),bar(),bar(),bar(),x==y)) < u)
|
|
|
22 return x;
|
|
|
23
|
|
|
24 /* Test an ABS_EXPR, which is by definition non-negative when
|
|
|
25 -fstrict-overflow is used. */
|
|
|
26 if (u < __builtin_abs(x))
|
|
|
27 return x;
|
|
|
28 if (__builtin_abs(x) < u)
|
|
|
29 return x;
|
|
|
30 if (u < (x ? __builtin_abs(x) : 10))
|
|
|
31 return x;
|
|
|
32 if ((x ? 10: __builtin_abs(x)) < u)
|
|
|
33 return x;
|
|
|
34
|
|
|
35 /* A MODIFY_EXPR is non-negative if the new value is known to be
|
|
|
36 non-negative. */
|
|
|
37 if (u < (x = -1)) /* { dg-warning "9:different signedness" "MODIFY_EXPR" } */
|
|
|
38 return x;
|
|
|
39 if (u < (x = 10))
|
|
|
40 return x;
|
|
|
41 if ((x = 10) < u)
|
|
|
42 return x;
|
|
|
43 if (u < (x = (y ? (x==y) : 10)))
|
|
|
44 return x;
|
|
|
45 if ((x = (y ? 10 : (x==y))) < u)
|
|
|
46 return x;
|
|
|
47
|
|
|
48 return 0;
|
|
|
49 }
|
