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111
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1 /* Test for a bogus warning on comparison between signed and unsigned.
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2 Origin: Kaveh R. Ghazi <ghazi@caip.rutgers.edu> 8/21/2001. */
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3
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4 /* { dg-do compile } */
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5 /* { dg-options "-Wsign-compare" } */
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6
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7 extern void bar(void);
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8
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9 int foo(int x, int y, unsigned u)
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10 {
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11 /* A *_DIV_EXPR is non-negative if both operands are. */
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12
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13 if (u < ((x=-22)/33)) /* { dg-warning "different signedness" "DIV_EXPR" } */
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14 return x;
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15
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16 if (u < ((x=22)/33))
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17 return x;
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18
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19 if (u < ((x=22)/(y=33)))
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20 return x;
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21
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22 if (u < (((x&0x10000)?128:64) / ((y&0x10000)?8:4)))
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23 return x;
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24
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25
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26 /* A *_MOD_EXPR is non-negative if the first operand is. */
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27
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28 if (u < ((x=-22)%33)) /* { dg-warning "different signedness" "MOD_EXPR" } */
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29 return x;
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30
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31 if (u < ((x=22)%-33))
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32 return x;
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33
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34 if (u < ((x==y)%-33))
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35 return x;
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36
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37 if (u < (((x=22)/33)%-33))
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38 return x;
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39
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40 return 0;
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41 }
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