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/* PR c/65179 */
/* { dg-do compile } */
/* { dg-options "-O -Wshift-negative-value" } */
/* { dg-additional-options "-std=c++11" { target c++ } } */
enum E {
A = 0 << 1,
B = 1 << 1,
C = -1 << 1, /* { dg-warning "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 "left shift of negative value" } */
r += 0 << x;
r += 1 << x;
r += -1 << x; /* { dg-warning "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;
}
/* { dg-error "not an integer constant" "no constant" { target c++ } 9 } */
/* { dg-error "left operand of shift expression" "shift" { target c++ } 9 } */
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