1 /* PR c/65179 */
2 /* { dg-do compile } */
3 /* { dg-options "-O -Wextra" } */
4 /* { dg-additional-options "-std=c++11 -std=c++03" { target c++ } } */
5 /* { dg-additional-options "-std=c90" { target c } } */
6 
7 enum E {
8   A = 0 << 1,
9   B = 1 << 1,
10   C = -1 << 1, /* { dg-bogus "left shift of negative value" } */
11   D = 0 >> 1,
12   E = 1 >> 1,
13   F = -1 >> 1
14 };
15 
16 int
17 left (int x)
18 {
19   /* Warn for LSHIFT_EXPR.  */
20   const int z = 0;
21   const int o = 1;
22   const int m = -1;
23   int r = 0;
24   r += z << x;
25   r += o << x;
26   r += m << x; /* { dg-bogus "left shift of negative value" } */
27   r += 0 << x;
28   r += 1 << x;
29   r += -1 << x; /* { dg-bogus "left shift of negative value" } */
30   r += -1U << x;
31   return r;
32 }
33 
34 int
35 right (int x)
36 {
37   /* Shouldn't warn for RSHIFT_EXPR.  */
38   const int z = 0;
39   const int o = 1;
40   const int m = -1;
41   int r = 0;
42   r += z >> x;
43   r += o >> x;
44   r += m >> x;
45   r += 0 >> x;
46   r += 1 >> x;
47   r += -1 >> x;
48   r += -1U >> x;
49   return r;
50 }
51