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annotate gcc/testsuite/gcc.dg/Wsign-conversion.c @ 111:04ced10e8804

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gcc 7
author kono
date Fri, 27 Oct 2017 22:46:09 +0900
parents
children 84e7813d76e9
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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111
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1 /* Test for diagnostics for implicit conversions between signed and
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2 unsigned integer types.
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3 These tests come from gcc/testsuite/gcc.dg/overflow-warn-2.c */
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4
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5 /* { dg-do compile } */
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6 /* { dg-options "-std=c99 -fsigned-char -Wsign-conversion" } */
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7 #include <limits.h>
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8
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9 void fsc (signed char sc);
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10 void fuc (unsigned char uc);
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11 unsigned fui (unsigned int ui);
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12 void fsi (signed int ui);
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13
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14 void h (int x)
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15 {
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16 unsigned int ui = 3;
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17 int si = 3;
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18 unsigned char uc = 3;
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19 signed char sc = 3;
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20
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21 uc = ui;
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22 uc = si;
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23 sc = ui;
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24 sc = si;
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25 fuc (ui);
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26 fuc (si);
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27 fsc (ui);
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28 fsc (si);
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29
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30 fsi (si);
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31 fui (ui);
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32 fsi (uc);
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33 si = uc;
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34 fui (uc);
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35 ui = uc;
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36 fui ('A');
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37 ui = 'A';
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38 fsi ('A');
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39 si = 'A';
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40 fuc ('A');
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41 uc = 'A';
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42
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43 uc = x ? 1U : -1; /* { dg-warning "unsigned conversion from .int. to .unsigned int. changes value from .-1. to .\[0-9\]+." } */
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44 uc = x ? SCHAR_MIN : 1U; /* { dg-warning "unsigned conversion from .int. to .unsigned int. changes value from .-\[0-9\]+. to .\[0-9\]+." } */
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45 uc = x ? 1 : -1; /* { dg-warning "unsigned conversion from .int. to .unsigned char. changes the value of .-1." } */
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46 uc = x ? SCHAR_MIN : 1; /* { dg-warning "unsigned conversion from .int. to .unsigned char. changes the value of .-\[0-9\]+." } */
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47 ui = x ? 1U : -1; /* { dg-warning "unsigned conversion from .int. to .unsigned int. changes value from .-1. to .\[0-9\]+." } */
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48 ui = x ? INT_MIN : 1U; /* { dg-warning "unsigned conversion from .int. to .unsigned int. changes value from .-\[0-9\]+. to .\[0-9\]+." } */
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49 ui = ui ? SCHAR_MIN : 1U; /* { dg-warning "unsigned conversion from .int. to .unsigned int. changes value " } */
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50 ui = 1U * -1; /* { dg-warning "unsigned conversion from .int. to .unsigned int. changes value " } */
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51 ui = ui + INT_MIN; /* { dg-warning "unsigned conversion from .int. to .unsigned int. changes value " } */
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52 ui = x ? 1 : -1; /* { dg-warning "unsigned conversion from .int. to .unsigned int. changes the value of .-1." } */
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53 ui = ui ? SCHAR_MIN : 1; /* { dg-warning "unsigned conversion from .int. to .unsigned int. changes the value of " } */
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54
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55 fuc (-1); /* { dg-warning "unsigned conversion" } */
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56 uc = -1; /* { dg-warning "unsigned conversion" } */
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57 fui (-1); /* { dg-warning "unsigned conversion" } */
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58 ui = -1; /* { dg-warning "unsigned conversion" } */
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59 fuc ('\xa0'); /* { dg-warning "unsigned conversion" } */
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60 uc = '\xa0'; /* { dg-warning "unsigned conversion" } */
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61 fui ('\xa0');/* { dg-warning "unsigned conversion" } */
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62 ui = '\xa0'; /* { dg-warning "unsigned conversion" } */
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63 fsi (0x80000000); /* { dg-warning "signed conversion" } */
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64 si = 0x80000000; /* { dg-warning "signed conversion" } */
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65
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66
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67 fsi (UINT_MAX - 1); /* { dg-warning "conversion" } */
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68 si = UINT_MAX - 1; /* { dg-warning "conversion" } */
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69 fsi (UINT_MAX - 1U); /* { dg-warning "conversion" } */
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70 si = UINT_MAX - 1U; /* { dg-warning "conversion" } */
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71 fsi (UINT_MAX/3U);
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72 si = UINT_MAX/3U;
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73 fsi (UINT_MAX/3);
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74 si = UINT_MAX/3;
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75 fui (UINT_MAX - 1);
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76 ui = UINT_MAX - 1;
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77
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78 uc = (unsigned char) -1;
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79 ui = -1 * (1 * -1);
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80 ui = (unsigned) -1;
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81
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82 fsc (uc); /* { dg-warning "conversion" } */
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83 sc = uc; /* { dg-warning "conversion" } */
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84 fuc (sc); /* { dg-warning "conversion" } */
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85 uc = sc; /* { dg-warning "conversion" } */
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86 fsi (ui); /* { dg-warning "conversion" } */
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87 si = ui; /* { dg-warning "conversion" } */
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88 fui (si); /* { dg-warning "conversion" } */
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89 ui = si; /* { dg-warning "conversion" } */
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90 fui (sc); /* { dg-warning "conversion" } */
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91 ui = sc; /* { dg-warning "conversion" } */
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92 }
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93
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94 unsigned fui (unsigned a) { return a + -1; } /* { dg-warning "unsigned conversion from .int. to .unsigned int. changes value" } */
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95
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96