| /* PR c/65179 */ |
| /* { dg-do compile } */ |
| /* { dg-options "-O -Wshift-negative-value" } */ |
| /* { dg-additional-options "-std=c++03" { target c++ } } */ |
| /* { dg-additional-options "-std=c90" { target c } } */ |
| |
| enum E { |
| A = 0 << 1, |
| B = 1 << 1, |
| C = -1 << 1, /* { dg-warning "10:left shift of negative value" } */ |
| D = 0 >> 1, |
| E = 1 >> 1, |
| F = -1 >> 1 |
| }; |
| |
| int |
| left (int x) |
| { |
| /* Warn for LSHIFT_EXPR. */ |
| const int z = 0; |
| const int o = 1; |
| const int m = -1; |
| int r = 0; |
| r += z << x; |
| r += o << x; |
| r += m << x; /* { dg-warning "10:left shift of negative value" } */ |
| r += 0 << x; |
| r += 1 << x; |
| r += -1 << x; /* { dg-warning "11:left shift of negative value" } */ |
| r += -1U << x; |
| return r; |
| } |
| |
| int |
| right (int x) |
| { |
| /* Shouldn't warn for RSHIFT_EXPR. */ |
| const int z = 0; |
| const int o = 1; |
| const int m = -1; |
| int r = 0; |
| r += z >> x; |
| r += o >> x; |
| r += m >> x; |
| r += 0 >> x; |
| r += 1 >> x; |
| r += -1 >> x; |
| r += -1U >> x; |
| return r; |
| } |