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4c82050e94
Type ulong is 64-bit on 32-bit Linux, but has 32-bit alignment. This affects the layout of bitfields. Also add a new test for ImportC bitfields, which compares size, alignment and layout with the host C++ compiler. The existing tests compared with fixed values instead.
206 lines
8.8 KiB
C
206 lines
8.8 KiB
C
/* test bitfields
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* DISABLED: win32 win64 linux32 freebsd32 openbsd32 osx32
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* RUN_OUTPUT:
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---
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T0 = 1 1 | 1 1
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T1 = 2 2 | 2 2
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T2 = 4 4 | 4 4
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T3 = 8 8 | 8 8
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T4 = 16 8 | 16 8
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T5 = 8 8 | 8 8
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S1 = 8 8 | 8 8
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S2 = 4 4 | 4 4
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S3 = 4 4 | 4 4
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S4 = 4 4 | 4 4
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S5 = 4 4 | 4 4
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S6 = 2 2 | 2 2
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S7 = 8 8 | 8 8
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S8 = 2 2 | 2 2
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S8A = 2 2 | 2 2
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S8B = 2 2 | 2 2
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S8C = 4 4 | 4 4
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S9 = 4 2 | 4 2
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S10 = 0 1 | 0 1
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S11 = 0 1 | 0 1
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S12 = 4 4 | 4 4
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S13 = 8 4 | 8 4
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S14 = 8 4 | 8 4
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S15 = 4 4 | 4 4
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S16 = 4 1 | 4 1
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S17 = 4 4 | 4 4
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S18 = 9 1 | 9 1
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A0 = 16 8 | 16 8
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A1 = 12 4 | 12 4
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A2 = 12 4 | 12 4
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A3 = 16 4 | 16 4
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A4 = 8 4 | 8 4
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A5 = 2 1 | 2 1
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A6 = 2 2 | 2 2
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A7 = 16 8 | 16 8
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A8 = 8 8 | 8 8
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A9 = 16 8 | 16 8
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A10 = 2 2 | 2 2
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A11 = 12 4 | 12 4
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Issue24592a = 8 8 | 8 8
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Issue24592b = 16 8 | 16 8
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Issue24592c = 24 8 | 24 8
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Issue24592d = 16 8 | 16 8
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S9 = x30200
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S14 = x300000201
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S15 = xe01
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S18 = 8 should be 8
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A0 = x1
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---
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*/
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int printf(const char *fmt, ...);
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void exit(int);
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void assert(int n, int b)
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{
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if (!b)
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{
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printf("assert fail %d\n", n);
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exit(1);
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}
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}
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int is64bit() { return sizeof(long) == 8; } // otherwise assume 32 bit
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/*************************************************************/
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struct T0 { char x:1; }; // 1 1
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struct T1 { short x:1; }; // 2 2
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struct T2 { int x:1; }; // 4 4
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struct T3 { char a,b,c,d; long long x:1; }; // 8 4 (32 bit) 8 8 (64 bit)
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struct T4 { char a,b,c,d,e,f,g,h; long long x:1; }; // 12 4 (32 bit) 16 8 (64 bit)
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struct T5 { char a,b,c,d,e,f,g; long long x:1; }; // 8 4 (32 bit) 8 8 (64 bit)
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struct S1 { long long int f:1; }; // 4 4 (32 bit) 8 8 (64 bit)
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struct S2 { int x:1; int y:1; }; // 4 4
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struct S3 { short c; int x:1; unsigned y:1; }; // 4 4
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struct S4 { int x:1; short y:1; }; // 4 4
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struct S5 { short x:1; int y:1; }; // 4 4
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struct S6 { short x:1; short y:1; }; // 2 2
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struct S7 { short x:1; int y:1; long long z:1; }; // 4 4 (32 bit) 8 8 (64 bit)
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struct S8 { char a; char b:1; short c:2; }; // 2 2
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struct S8A { char b:1; short c:2; }; // 2 2
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struct S8B { char a; short b:1; char c:2; }; // 2 2
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struct S8C { char a; int b:1; }; // 4 4
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struct S9 { char a; char b:2; short c:9; }; // 4 2 x30201
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struct S10 { }; // 0 1
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struct S11 { int :0; }; // 0 1
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struct S12 { int :0; int x; }; // 4 4
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struct S13 { unsigned x:12; unsigned x1:1; unsigned x2:1; unsigned x3:1; unsigned x4:1; int w; }; // 8 4
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struct S14 { char a; char b:4; int c:30; }; // 8 4
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struct S15 { char a; char b:2; int c:9; }; // 4 4 xe01
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struct S16 { int :32; }; // 4 1
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struct S17 { int a:32; }; // 4 4
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struct S18 { char a; long long :0; char b; }; // 5 1 (32 bit) 9 1 (64 bit)
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struct A0 { int a; long long b:34, c:4; }; // 12 4 (32 bit) 16 8 (64 bit)
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struct A1 { int a; unsigned b:11; int c; }; // 12 4
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struct A2 { int a; unsigned b:11, c:5, d:16; // 12 4
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int e; };
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struct A3 { int a; unsigned b:11, c:5, :0, d:16; // 16 4
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int e; };
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struct A4 { int a:8; short b:7; // 8 4
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unsigned int c:29; };
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struct A5 { char a:7, b:2; }; // 2 1
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struct A6 { char a:7; short b:2; }; // 2 2
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struct A7 { short a:8; long b:16; int c; // 12 4 (32 bit) 16 8 (64 bit)
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char d:7; };
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struct A8 { short a:8; long b:16; int :0; // 8 4 (32 bit) 8 8 (64 bit)
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char c:7; };
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struct A9 { unsigned short a:8; long b:16; // 16 4 (32 bit) 16 8 (64 bit)
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unsigned long c:29; long long d:9;
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unsigned long e:2, f:31; };
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struct A10 { unsigned short a:8; char b; }; // 2 2
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struct A11 { char a; int b:5, c:11, :0, d:8; // 12 4
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struct { int ee:8; } e; };
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struct Issue24592a { unsigned long long a:20, b:20, c:24; };
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struct Issue24592b { unsigned int x; unsigned long long a:20, b:20, c:24; };
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struct Issue24592c { unsigned long long a:20, b:32, c:32, d:32, e:32, f:32; };
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struct Issue24592d { unsigned long long a:10, b:16, c:16, d:16, e:16, f:16; };
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int main()
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{
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printf("T0 = %d %d | 1 1\n", (int)sizeof(struct T0), (int)_Alignof(struct T0));
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printf("T1 = %d %d | 2 2\n", (int)sizeof(struct T1), (int)_Alignof(struct T1));
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printf("T2 = %d %d | 4 4\n", (int)sizeof(struct T2), (int)_Alignof(struct T2));
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printf("T3 = %d %d | 8 8\n", (int)sizeof(struct T3), (int)_Alignof(struct T3));
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printf("T4 = %d %d | 16 8\n", (int)sizeof(struct T4), (int)_Alignof(struct T4));
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printf("T5 = %d %d | 8 8\n", (int)sizeof(struct T5), (int)_Alignof(struct T5));
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printf("S1 = %d %d | 8 8\n", (int)sizeof(struct S1), (int)_Alignof(struct S1));
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printf("S2 = %d %d | 4 4\n", (int)sizeof(struct S2), (int)_Alignof(struct S2));
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printf("S3 = %d %d | 4 4\n", (int)sizeof(struct S3), (int)_Alignof(struct S3));
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printf("S4 = %d %d | 4 4\n", (int)sizeof(struct S4), (int)_Alignof(struct S4));
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printf("S5 = %d %d | 4 4\n", (int)sizeof(struct S5), (int)_Alignof(struct S5));
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printf("S6 = %d %d | 2 2\n", (int)sizeof(struct S6), (int)_Alignof(struct S6));
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printf("S7 = %d %d | 8 8\n", (int)sizeof(struct S7), (int)_Alignof(struct S7));
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printf("S8 = %d %d | 2 2\n", (int)sizeof(struct S8), (int)_Alignof(struct S8));
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printf("S8A = %d %d | 2 2\n", (int)sizeof(struct S8A), (int)_Alignof(struct S8A));
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printf("S8B = %d %d | 2 2\n", (int)sizeof(struct S8B), (int)_Alignof(struct S8B));
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printf("S8C = %d %d | 4 4\n", (int)sizeof(struct S8C), (int)_Alignof(struct S8C));
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printf("S9 = %d %d | 4 2\n", (int)sizeof(struct S9), (int)_Alignof(struct S9));
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printf("S10 = %d %d | 0 1\n", (int)sizeof(struct S10), (int)_Alignof(struct S10));
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printf("S11 = %d %d | 0 1\n", (int)sizeof(struct S11), (int)_Alignof(struct S11));
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printf("S12 = %d %d | 4 4\n", (int)sizeof(struct S12), (int)_Alignof(struct S12));
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printf("S13 = %d %d | 8 4\n", (int)sizeof(struct S13), (int)_Alignof(struct S13));
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printf("S14 = %d %d | 8 4\n", (int)sizeof(struct S14), (int)_Alignof(struct S14));
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printf("S15 = %d %d | 4 4\n", (int)sizeof(struct S15), (int)_Alignof(struct S15));
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printf("S16 = %d %d | 4 1\n", (int)sizeof(struct S16), (int)_Alignof(struct S16));
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printf("S17 = %d %d | 4 4\n", (int)sizeof(struct S17), (int)_Alignof(struct S17));
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printf("S18 = %d %d | 9 1\n", (int)sizeof(struct S18), (int)_Alignof(struct S18));
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printf("A0 = %d %d | 16 8\n", (int)sizeof(struct A0), (int)_Alignof(struct A0));
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printf("A1 = %d %d | 12 4\n", (int)sizeof(struct A1), (int)_Alignof(struct A1));
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printf("A2 = %d %d | 12 4\n", (int)sizeof(struct A2), (int)_Alignof(struct A2));
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printf("A3 = %d %d | 16 4\n", (int)sizeof(struct A3), (int)_Alignof(struct A3));
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printf("A4 = %d %d | 8 4\n", (int)sizeof(struct A4), (int)_Alignof(struct A4));
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printf("A5 = %d %d | 2 1\n", (int)sizeof(struct A5), (int)_Alignof(struct A5));
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printf("A6 = %d %d | 2 2\n", (int)sizeof(struct A6), (int)_Alignof(struct A6));
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printf("A7 = %d %d | 16 8\n", (int)sizeof(struct A7), (int)_Alignof(struct A7));
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printf("A8 = %d %d | 8 8\n", (int)sizeof(struct A8), (int)_Alignof(struct A8));
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printf("A9 = %d %d | 16 8\n", (int)sizeof(struct A9), (int)_Alignof(struct A9));
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printf("A10 = %d %d | 2 2\n", (int)sizeof(struct A10), (int)_Alignof(struct A10));
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printf("A11 = %d %d | 12 4\n", (int)sizeof(struct A11), (int)_Alignof(struct A11));
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printf("Issue24592a = %d %d | 8 8\n", (int)sizeof(struct Issue24592a), (int)_Alignof(struct Issue24592a));
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printf("Issue24592b = %d %d | 16 8\n", (int)sizeof(struct Issue24592b), (int)_Alignof(struct Issue24592b));
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printf("Issue24592c = %d %d | 24 8\n", (int)sizeof(struct Issue24592c), (int)_Alignof(struct Issue24592c));
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printf("Issue24592d = %d %d | 16 8\n", (int)sizeof(struct Issue24592d), (int)_Alignof(struct Issue24592d));
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{
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struct S9 s;
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*(unsigned *)&s = 0;
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s.b = 2; s.c = 3;
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unsigned x = *(unsigned *)&s;
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printf("S9 = x%x\n", x);
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}
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{
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struct S14 s = { 1, 2, 3 };
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*(long long *)&s = 0;
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s.a = 1;
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s.b = 2;
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s.c = 3;
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unsigned long long v = *(unsigned long long *)&s;
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printf("S14 = x%llx\n", v);
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}
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{
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struct S15 s = { 1,2,3 };
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*(unsigned *)&s = 0;
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s.a = 1; s.b = 2; s.c = 3;
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unsigned x = *(unsigned *)&s;
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printf("S15 = x%x\n", x);
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}
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{
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struct S18 s;
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printf("S18 = %d should be %d\n", (int)(&s.b - &s.a), is64bit() ? 8 : 4);
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}
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{
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struct A0 s;
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*(long long *)&s = 0;
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s.a = 1; s.b = 15;
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long long x = *(long long *)&s;
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printf("A0 = x%llx\n", x);
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}
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return 0;
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}
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