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1 // RUN: %clang_cc1 -triple=x86_64-pc-linux-gnu -fsyntax-only -verify -Wsign-compare %s
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2 // RUN: %clang_cc1 -triple=x86_64-pc-win32 -fsyntax-only -verify -Wsign-compare %s
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3 // RUN: %clang_cc1 -x c++ -triple=x86_64-pc-linux-gnu -fsyntax-only -verify -Wsign-compare %s
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4 // RUN: %clang_cc1 -x c++ -triple=x86_64-pc-win32 -fsyntax-only -verify -Wsign-compare %s
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5
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6 // Check that -Wsign-compare is off by default.
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7 // RUN: %clang_cc1 -triple=x86_64-pc-linux-gnu -fsyntax-only -verify -DSILENCE %s
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8
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9 #ifdef SILENCE
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10 // expected-no-diagnostics
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11 #endif
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12
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13 enum PosEnum {
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14 A_a = 0,
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15 A_b = 1,
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16 A_c = 10
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17 };
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18
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19 static const int message[] = {0, 1};
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20
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21 int test_pos(enum PosEnum a) {
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22 if (a < 2)
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23 return 0;
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24
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25 // No warning, except in Windows C mode, where PosEnum is 'int' and it can
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26 // take on any value according to the C standard.
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27 #if !defined(SILENCE) && defined(_WIN32) && !defined(__cplusplus)
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28 // expected-warning@+2 {{comparison of integers of different signs}}
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29 #endif
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30 if (a < 2U)
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31 return 0;
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32
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33 unsigned uv = 2;
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34 #if !defined(SILENCE) && defined(_WIN32) && !defined(__cplusplus)
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35 // expected-warning@+2 {{comparison of integers of different signs}}
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36 #endif
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37 if (a < uv)
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38 return 1;
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39
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40 #if !defined(SILENCE) && defined(_WIN32) && !defined(__cplusplus)
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41 // expected-warning@+2 {{comparison of integers of different signs}}
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42 #endif
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43 if (a < sizeof(message)/sizeof(message[0]))
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44 return 0;
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45 return 4;
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46 }
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47
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48 enum NegEnum {
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49 NE_a = -1,
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50 NE_b = 0,
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51 NE_c = 10
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52 };
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53
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54 int test_neg(enum NegEnum a) {
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55 if (a < 2)
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56 return 0;
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57
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58 #ifndef SILENCE
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59 // expected-warning@+2 {{comparison of integers of different signs}}
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60 #endif
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61 if (a < 2U)
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62 return 0;
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63
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64 unsigned uv = 2;
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65 #ifndef SILENCE
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66 // expected-warning@+2 {{comparison of integers of different signs}}
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67 #endif
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68 if (a < uv)
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69 return 1;
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70
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71 #ifndef SILENCE
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72 // expected-warning@+2 {{comparison of integers of different signs}}
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73 #endif
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74 if (a < sizeof(message)/sizeof(message[0]))
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75 return 0;
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76 return 4;
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77 }
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