| 1 | // RUN: %clang_cc1 -triple=x86_64-none-none -Wpadded -Wpacked -verify %s -emit-llvm-only |
| 2 | |
| 3 | struct S1 { |
| 4 | char c; |
| 5 | short s; // expected-warning {{padding struct 'S1' with 1 byte to align 's'}} |
| 6 | long l; // expected-warning {{padding struct 'S1' with 4 bytes to align 'l'}} |
| 7 | }; |
| 8 | |
| 9 | struct S2 { // expected-warning {{padding size of 'S2' with 3 bytes to alignment boundary}} |
| 10 | int i; |
| 11 | char c; |
| 12 | }; |
| 13 | |
| 14 | struct S3 { |
| 15 | char c; |
| 16 | int i; |
| 17 | } __attribute__((packed)); |
| 18 | |
| 19 | struct S4 { |
| 20 | int i; |
| 21 | char c; |
| 22 | } __attribute__((packed)); |
| 23 | |
| 24 | struct S5 { |
| 25 | char c; |
| 26 | union { |
| 27 | char c; |
| 28 | int i; |
| 29 | } u; // expected-warning {{padding struct 'S5' with 3 bytes to align 'u'}} |
| 30 | }; |
| 31 | |
| 32 | struct S6 { // expected-warning {{padding size of 'S6' with 30 bits to alignment boundary}} |
| 33 | int i : 2; |
| 34 | }; |
| 35 | |
| 36 | struct S7 { // expected-warning {{padding size of 'S7' with 7 bytes to alignment boundary}} |
| 37 | char c; |
| 38 | virtual void m(); |
| 39 | }; |
| 40 | |
| 41 | struct B { |
| 42 | char c; |
| 43 | }; |
| 44 | |
| 45 | struct S8 : B { |
| 46 | int i; // expected-warning {{padding struct 'S8' with 3 bytes to align 'i'}} |
| 47 | }; |
| 48 | |
| 49 | struct S9 { |
| 50 | int x; |
| 51 | int y; |
| 52 | } __attribute__((packed)); |
| 53 | |
| 54 | struct S10 { |
| 55 | int x; |
| 56 | char a,b,c,d; |
| 57 | } __attribute__((packed)); |
| 58 | |
| 59 | |
| 60 | struct S11 { // expected-warning {{packed attribute is unnecessary for 'S11'}} |
| 61 | bool x; |
| 62 | char a,b,c,d; |
| 63 | } __attribute__((packed)); |
| 64 | |
| 65 | struct S12 { |
| 66 | bool b : 1; |
| 67 | char c; // expected-warning {{padding struct 'S12' with 7 bits to align 'c'}} |
| 68 | }; |
| 69 | |
| 70 | struct S13 { // expected-warning {{padding size of 'S13' with 6 bits to alignment boundary}} |
| 71 | char c; |
| 72 | bool b : 10; |
| 73 | }; |
| 74 | |
| 75 | struct S14 { // expected-warning {{packed attribute is unnecessary for 'S14'}} |
| 76 | char a,b,c,d; |
| 77 | } __attribute__((packed)); |
| 78 | |
| 79 | struct S15 { // expected-warning {{packed attribute is unnecessary for 'S15'}} |
| 80 | struct S14 s; |
| 81 | char a; |
| 82 | } __attribute__((packed)); |
| 83 | |
| 84 | struct S16 { // expected-warning {{padding size of 'S16' with 2 bytes to alignment boundary}} expected-warning {{packed attribute is unnecessary for 'S16'}} |
| 85 | char a,b; |
| 86 | } __attribute__((packed, aligned(4))); |
| 87 | |
| 88 | struct S17 { |
| 89 | struct S16 s; |
| 90 | char a,b; |
| 91 | } __attribute__((packed, aligned(2))); |
| 92 | |
| 93 | struct S18 { // expected-warning {{padding size of 'S18' with 2 bytes to alignment boundary}} expected-warning {{packed attribute is unnecessary for 'S18'}} |
| 94 | struct S16 s; |
| 95 | char a,b; |
| 96 | } __attribute__((packed, aligned(4))); |
| 97 | |
| 98 | struct S19 { // expected-warning {{packed attribute is unnecessary for 'S19'}} |
| 99 | bool b; |
| 100 | char a; |
| 101 | } __attribute__((packed, aligned(1))); |
| 102 | |
| 103 | struct S20 { |
| 104 | int i; |
| 105 | char a; |
| 106 | } __attribute__((packed, aligned(1))); |
| 107 | |
| 108 | struct S21 { // expected-warning {{padding size of 'S21' with 4 bits to alignment boundary}} |
| 109 | unsigned char a : 6; |
| 110 | unsigned char b : 6; |
| 111 | } __attribute__((packed, aligned(1))); |
| 112 | |
| 113 | struct S22 { // expected-warning {{packed attribute is unnecessary for 'S22'}} |
| 114 | unsigned char a : 4; |
| 115 | unsigned char b : 4; |
| 116 | } __attribute__((packed)); |
| 117 | |
| 118 | struct S23 { // expected-warning {{padding size of 'S23' with 4 bits to alignment boundary}} expected-warning {{packed attribute is unnecessary for 'S23'}} |
| 119 | unsigned char a : 2; |
| 120 | unsigned char b : 2; |
| 121 | } __attribute__((packed)); |
| 122 | |
| 123 | struct S24 { |
| 124 | unsigned char a : 6; |
| 125 | unsigned char b : 6; |
| 126 | unsigned char c : 6; |
| 127 | unsigned char d : 6; |
| 128 | unsigned char e : 6; |
| 129 | unsigned char f : 6; |
| 130 | unsigned char g : 6; |
| 131 | unsigned char h : 6; |
| 132 | } __attribute__((packed)); |
| 133 | |
| 134 | struct S25 { // expected-warning {{padding size of 'S25' with 7 bits to alignment boundary}} expected-warning {{packed attribute is unnecessary for 'S25'}} |
| 135 | unsigned char a; |
| 136 | unsigned char b : 1; |
| 137 | } __attribute__((packed)); |
| 138 | |
| 139 | struct S26 { // expected-warning {{packed attribute is unnecessary for 'S26'}} |
| 140 | unsigned char a : 1; |
| 141 | unsigned char b; //expected-warning {{padding struct 'S26' with 7 bits to align 'b'}} |
| 142 | } __attribute__((packed)); |
| 143 | |
| 144 | struct S27 { // expected-warning {{padding size of 'S27' with 7 bits to alignment boundary}} |
| 145 | unsigned char a : 1; |
| 146 | unsigned char b : 8; |
| 147 | } __attribute__((packed)); |
| 148 | |
| 149 | |
| 150 | // The warnings are emitted when the layout of the structs is computed, so we have to use them. |
| 151 | void f(S1*, S2*, S3*, S4*, S5*, S6*, S7*, S8*, S9*, S10*, S11*, S12*, S13*, |
| 152 | S14*, S15*, S16*, S17*, S18*, S19*, S20*, S21*, S22*, S23*, S24*, S25*, |
| 153 | S26*, S27*){} |
| 154 | |