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111
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1 /* PR c/65179 */
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2 /* { dg-do compile } */
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3 /* { dg-options "-O -Wextra" } */
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4 /* { dg-additional-options "-std=c++11" { target c++ } } */
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5
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6 enum E {
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7 A = 0 << 1,
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8 B = 1 << 1,
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145
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9 C = -1 << 1, /* { dg-warning "10:left shift of negative value|not an integer constant" } */
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111
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10 /* { dg-error "left operand of shift expression" "shift" { target c++ } .-1 } */
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11 D = 0 >> 1,
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12 E = 1 >> 1,
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13 F = -1 >> 1
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14 };
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15
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16 int
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17 left (int x)
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18 {
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19 /* Warn for LSHIFT_EXPR. */
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20 const int z = 0;
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21 const int o = 1;
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22 const int m = -1;
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23 int r = 0;
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24 r += z << x;
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25 r += o << x;
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145
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26 r += m << x; /* { dg-warning "10:left shift of negative value" } */
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111
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27 r += 0 << x;
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28 r += 1 << x;
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145
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29 r += -1 << x; /* { dg-warning "11:left shift of negative value" } */
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111
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30 r += -1U << x;
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31 return r;
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32 }
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33
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34 int
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35 right (int x)
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36 {
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37 /* Shouldn't warn for RSHIFT_EXPR. */
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38 const int z = 0;
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39 const int o = 1;
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40 const int m = -1;
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41 int r = 0;
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42 r += z >> x;
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43 r += o >> x;
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44 r += m >> x;
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45 r += 0 >> x;
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46 r += 1 >> x;
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47 r += -1 >> x;
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48 r += -1U >> x;
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49 return r;
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50 }
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