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[/] [openrisc/] [tags/] [gnu-src/] [gcc-4.5.1/] [gcc-4.5.1-or32-1.0rc3/] [gcc/] [testsuite/] [gcc.dg/] [pack-test-1.c] - Rev 298
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/* Test semantics of #pragma pack. Contributed by Mike Coleman <mcoleman2@kc.rr.com> */ /* { dg-do compile { target { { *-*-linux* *-*-cygwin* powerpc*-*-eabi* } && { ! default_packed } } } } */ /* Mainly we're just testing whether pushing and popping seem to be working correctly, and verifying the (alignment == 1) case, which is really the only reason anyone would use this pragma anyway. */ #include <stddef.h> /* generalized compile-time test expression */ #define test(n, expr) int test_##n [(expr) ? 1 : -1] /* Round V down to multiple of A */ #define floor(v,a) ((v) / (a) * (a)) /* Offset of field with alignment A in structure S after a field P of type PT */ #define offset(s,p,pt,a) \ floor ((offsetof(struct s, p) + sizeof (pt) + (a) - 1), a) /* regular minimum */ #define min(a,b) ((a) < (b) ? (a) : (b)) /* Check that field A (type AT) followed by field B (type BT) are packed according to P */ #define test_pack(n, a, at, b, bt, p) \ test(n, offsetof (struct SNAME, b) \ == min (offset (SNAME,a,at,__alignof__(bt)), \ offset (SNAME,a,at,p))) /* Test offset of field F in structs s1 and s2 are the same. */ #define test_offset(n, s1, s2, f) \ test (n, (offsetof(struct s1, f) == offsetof(struct s2, f))) #define SNAME s0 #include "pack-test-1.h" #undef SNAME #define SNAME s1 #pragma pack(push, p1, 1) #include "pack-test-1.h" void SNAME() { test_pack(0, f0, char, f1, double, 1); test_pack(1, f2, short, f3, double, 1); test_pack(2, f4, int, f5, double, 1); } #undef SNAME #define SNAME s2 #pragma pack(push, p2, 2) #include "pack-test-1.h" void SNAME() { test_pack(0, f0, char, f1, double, 2); test_pack(1, f2, short, f3, double, 2); test_pack(2, f4, int, f5, double, 2); } #undef SNAME #define SNAME s3 #pragma pack(push, p3, 4) #include "pack-test-1.h" void SNAME() { test_pack(0, f0, char, f1, double, 4); test_pack(1, f2, short, f3, double, 4); test_pack(2, f4, int, f5, double, 4); } #undef SNAME #define SNAME s4 #pragma pack(pop) #include "pack-test-1.h" void SNAME() { test_pack(0, f0, char, f1, double, 2); test_pack(1, f2, short, f3, double, 2); test_pack(2, f4, int, f5, double, 2); } #undef SNAME #define SNAME s5 #pragma pack(pop, p2) #include "pack-test-1.h" void SNAME() { test_pack(0, f0, char, f1, double, 1); test_pack(1, f2, short, f3, double, 1); test_pack(2, f4, int, f5, double, 1); } #undef SNAME #define SNAME s6 #pragma pack(pop, p1) #include "pack-test-1.h" void SNAME() { test_offset (0, s0, SNAME, f0); test_offset (1, s0, SNAME, f1); test_offset (2, s0, SNAME, f2); test_offset (3, s0, SNAME, f3); test_offset (4, s0, SNAME, f4); test_offset (5, s0, SNAME, f5); } #undef SNAME #define SNAME s7 #pragma pack(1) #include "pack-test-1.h" void SNAME() { test_pack(0, f0, char, f1, double, 1); test_pack(1, f2, short, f3, double, 1); test_pack(2, f4, int, f5, double, 1); } #undef SNAME #define SNAME s8 #pragma pack(push, p2, 2) #include "pack-test-1.h" void SNAME() { test_pack(0, f0, char, f1, double, 2); test_pack(1, f2, short, f3, double, 2); test_pack(2, f4, int, f5, double, 2); } #undef SNAME #define SNAME s9 #pragma pack(pop) #include "pack-test-1.h" void SNAME() { test_pack(0, f0, char, f1, double, 1); test_pack(1, f2, short, f3, double, 1); test_pack(2, f4, int, f5, double, 1); } #undef SNAME #define SNAME s10 #pragma pack() #include "pack-test-1.h" void SNAME() { test_offset (0, s0, SNAME, f0); test_offset (1, s0, SNAME, f1); test_offset (2, s0, SNAME, f2); test_offset (3, s0, SNAME, f3); test_offset (4, s0, SNAME, f4); test_offset (5, s0, SNAME, f5); }
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