/* { dg-do run } */ /* { dg-options "-fno-strict-aliasing" } */ /* { dg-skip-if "unaligned access" { arc*-*-* epiphany-*-* nds32*-*-* sparc*-*-* sh*-*-* tic6x-*-* } "*" "" } */ extern void abort (void); #if (__SIZEOF_INT__ <= 2) struct X { unsigned char pad : 4; unsigned int a : 16; unsigned int b : 8; unsigned int c : 6; } __attribute__((packed)); #else struct X { unsigned char pad : 4; unsigned int a : 32; unsigned int b : 24; unsigned int c : 6; } __attribute__((packed)); #endif int main (void) { struct X x; unsigned int bad_bits; x.pad = -1; x.a = -1; x.b = -1; x.c = -1; bad_bits = ((unsigned int)-1) ^ *(1+(unsigned int *) &x); if (bad_bits != 0) abort (); return 0; }