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; // expected-warning {{packed attribute is unnecessary for '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 { // expected-warning {{packed attribute is unnecessary for 'S9'}} 50 int x; // expected-warning {{packed attribute is unnecessary for 'x'}} 51 int y; // expected-warning {{packed attribute is unnecessary for 'y'}} 52 } __attribute__((packed)); 53 54 struct S10 { // expected-warning {{packed attribute is unnecessary for 'S10'}} 55 int x; // expected-warning {{packed attribute is unnecessary for 'x'}} 56 char a,b,c,d; 57 } __attribute__((packed)); 58 59 60 struct 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 // The warnings are emitted when the layout of the structs is computed, so we have to use them. 76 void f(S1*, S2*, S3*, S4*, S5*, S6*, S7*, S8*, S9*, S10*, S11*, S12*, S13*) { } 77
