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111
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1 /* PR 35635 */
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2 /* { dg-do compile } */
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3 /* { dg-options "-Wconversion -Wsign-conversion" } */
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4
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5 struct unsigned_bit {
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6 unsigned int x:1;
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7 } unsigned_bit;
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8 struct signed_bit {
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9 int x:1;
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10 } signed_bit;
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11 int bar;
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12 int bar2;
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13
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14 void func1()
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15 {
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16 /* The result of boolean operators fits in unsiged int:1, thus do
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17 not warn. */
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18 unsigned_bit.x = (bar != 0); /* { dg-bogus "conversion" } */
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19 unsigned_bit.x = (bar == 0); /* { dg-bogus "conversion" } */
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20 unsigned_bit.x = (bar <= 0); /* { dg-bogus "conversion" } */
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21 unsigned_bit.x = (bar >= 0); /* { dg-bogus "conversion" } */
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22 unsigned_bit.x = (bar < 0); /* { dg-bogus "conversion" } */
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23 unsigned_bit.x = (bar > 0); /* { dg-bogus "conversion" } */
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24 unsigned_bit.x = !bar; /* { dg-bogus "conversion" } */
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25 unsigned_bit.x = (bar || bar2); /* { dg-bogus "conversion" } */
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26 unsigned_bit.x = (bar && bar2); /* { dg-bogus "conversion" } */
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27
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28 /* Both branches of ? fit in the destination, thus do not warn. */
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29 unsigned_bit.x = bar != 0 ? 1 : 0; /* { dg-bogus "conversion" } */
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30 unsigned_bit.x = bar != 0 ? 1.0 : 0.0; /* { dg-bogus "conversion" } */
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31
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32 /* At least one branch of ? does not fit in the destination, thus
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33 warn. */
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34 unsigned_bit.x = bar != 0 ? 2 : 0; /* { dg-warning "conversion" } */
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35 unsigned_bit.x = bar != 0 ? 0 : -1; /* { dg-warning "-Wsign-conversion" } */
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36 }
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37
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38 void func2()
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39 {
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40 signed char schar_x;
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41
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42 /* Both branches of ? fit in the destination, thus do not warn. */
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43 schar_x = bar != 0 ? 1 : 0; /* { dg-bogus "conversion" } */
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44 schar_x = bar != 0 ? 2.0 : 10; /* { dg-bogus "conversion" } */
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45
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46 /* At least one branch of ? does not fit in the destination, thus
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47 warn. */
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48 schar_x = bar != 0 ? 2.1 : 10; /* { dg-warning "conversion" } */
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49 schar_x = bar != 0 ? (signed char) 1024: -1024; /* { dg-warning "conversion" } */
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50 }
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51
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52
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53
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54 void func3()
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55 {
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56 unsigned char uchar_x;
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57
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58 /* Both branches of ? fit in the destination, thus do not warn. */
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59 uchar_x = bar != 0 ? 1 : 0;
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60 uchar_x = bar != 0 ? 2.0 : 10;
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61
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62 /* At least one branch of ? does not fit in the destination, thus
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63 warn. */
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64 uchar_x = bar != 0 ? 2.1 : 10; /* { dg-warning "conversion" } */
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65 uchar_x = bar != 0 /* { dg-warning "-Wsign-conversion" } */
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66 ? (unsigned char) 1024
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67 : -1;
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68 }
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69
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70 void func4()
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71 {
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72 signed_bit.x = -1; /* { dg-bogus "conversion" } */
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73 signed_bit.x = bar != 0 ? -1.0 : 0.0; /* { dg-bogus "conversion" } */
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74 signed_bit.x = bar != 0 ? -1 : 0; /* { dg-bogus "conversion" } */
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75
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76
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77 signed_bit.x = 1; /* { dg-warning "conversion" } */
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78 signed_bit.x = (bar != 0); /* { dg-warning "conversion" } */
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79 signed_bit.x = (bar == 0); /* { dg-warning "conversion" } */
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80 signed_bit.x = (bar <= 0); /* { dg-warning "conversion" } */
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81 signed_bit.x = (bar >= 0); /* { dg-warning "conversion" } */
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82 signed_bit.x = (bar < 0); /* { dg-warning "conversion" } */
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83 signed_bit.x = (bar > 0); /* { dg-warning "conversion" } */
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84 signed_bit.x = !bar; /* { dg-warning "conversion" } */
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85 signed_bit.x = (bar || bar2); /* { dg-warning "conversion" } */
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86 signed_bit.x = (bar && bar2); /* { dg-warning "conversion" } */
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87 signed_bit.x = bar != 0 ? 1 : 0; /* { dg-warning "conversion" } */
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88 signed_bit.x = bar != 0 ? 2 : 0; /* { dg-warning "conversion" } */
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89 }
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90
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