/* { dg-options { -nostartfiles below100.o -Tbelow100.ld -O2 } } */ /* { dg-final { scan-assembler "clr1 32532,#7" } } */ typedef struct { unsigned short b0:1; unsigned short b1:1; unsigned short b2:1; unsigned short b3:1; unsigned short b4:1; unsigned short b5:1; unsigned short b6:1; unsigned short b7:1; unsigned short b8:1; unsigned short b9:1; unsigned short b10:1; unsigned short b11:1; unsigned short b12:1; unsigned short b13:1; unsigned short b14:1; unsigned short b15:1; } BitField; #define SFR (*((volatile BitField*)0x7f14)) unsigned short *p = (unsigned short *) 0x7f14; void Do (void) { SFR.b7 = 0; } int main (void) { *p = 0xedcb; Do (); return (*p == 0xed4b) ? 0 : 1; }