1 // RUN: %clang_cc1 %s -fsyntax-only -verify -triple=x86_64-apple-darwin10 2 3 #define CHECK_SIZE(name, size) extern int name##1[sizeof(name) == size ? 1 : -1]; 4 #define CHECK_ALIGN(name, size) extern int name##2[__alignof(name) == size ? 1 : -1]; 5 6 // Simple tests. 7 struct Test1 { 8 char c : 9; // expected-warning {{width of bit-field 'c' (9 bits) exceeds the width of its type; value will be truncated to 8 bits}} 9 }; 10 CHECK_SIZE(Test1, 2); 11 CHECK_ALIGN(Test1, 1); 12 13 struct Test1a { 14 char : 9; // no warning (there's no value to truncate here) 15 }; 16 CHECK_SIZE(Test1a, 2); 17 CHECK_ALIGN(Test1a, 1); 18 19 struct Test2 { 20 char c : 16; // expected-warning {{width of bit-field 'c' (16 bits) exceeds the width of its type; value will be truncated to 8 bits}} 21 }; 22 CHECK_SIZE(Test2, 2); 23 CHECK_ALIGN(Test2, 2); 24 25 struct Test3 { 26 char c : 32; // expected-warning {{width of bit-field 'c' (32 bits) exceeds the width of its type; value will be truncated to 8 bits}} 27 }; 28 CHECK_SIZE(Test3, 4); 29 CHECK_ALIGN(Test3, 4); 30 31 struct Test4 { 32 char c : 64; // expected-warning {{width of bit-field 'c' (64 bits) exceeds the width of its type; value will be truncated to 8 bits}} 33 }; 34 CHECK_SIZE(Test4, 8); 35 CHECK_ALIGN(Test4, 8); 36 37 struct Test5 { 38 char c : 0x100000001; // expected-warning {{width of bit-field 'c' (4294967297 bits) exceeds the width of its type; value will be truncated to 8 bits}} 39 }; 40 // Size and align don't really matter here, just make sure we don't crash. 41 CHECK_SIZE(Test5, 1); 42 CHECK_ALIGN(Test5, 1); 43 44 struct Test6 { 45 char c : (unsigned __int128)0xffffffffffffffff + 2; // expected-error {{bit-field 'c' is too wide (18446744073709551617 bits)}} 46 }; 47 // Size and align don't really matter here, just make sure we don't crash. 48 CHECK_SIZE(Test6, 1); 49 CHECK_ALIGN(Test6, 1); 50