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/* globalrefs.c - Test symbolic constant expressions constructed from
* global addresses and index expressions into global addresses.
* Do this both with global constants and with inline constant.
* Instead of printing absolute addresses, print out the differences in
* memory addresses to get output that matches that of the native compiler.
*/
#include <stdio.h>
#define __STDC_LIMIT_MACROS 1
#include <inttypes.h>
struct test {
long A;
struct { unsigned X; unsigned Y; } S;
struct test* next;
};
struct test TestArray[10];
struct test Test1;
/* Create global symbolic constants from the addresses of the above globals */
struct test* TestArrayPtr = &TestArray[3];
long* Aptr = &Test1.A;
unsigned* Yptr = &Test1.S.Y;
struct test** NextPtr = &Test1.next;
void
printdiff(void* p1, void* p2)
{
printf(" 0x%lx", (unsigned long) p1 - (unsigned long) p2);
}
int
main(int argc, char** argv)
{
unsigned long diff1, diff2, diff3, diff4;
printf("sizeof(struct Test) = %llu\n\n", sizeof(struct test));
printdiff(&TestArray[3], TestArray);
printdiff(&Test1.A, &TestArray[3]);
printdiff(&Test1.S.Y, &Test1.A);
printdiff(&Test1.next, &Test1.S.Y);
printf("\n");
diff1 = (unsigned long) &TestArray[3] - (unsigned long) TestArray;
diff2 = (unsigned long) &Test1.A - (unsigned long) &TestArray[3];
diff3 = (unsigned long) &Test1.S.Y - (unsigned long) &Test1.A;
diff4 = (unsigned long) &Test1.next - (unsigned long) &Test1.S.Y;
printf("&TestArray[3] - TestArray = 0x%lx\n", diff1);
printf("Aptr - &TestArray[3] = 0x%lx\n", diff2);
printf("Xptr - Aptr = 0x%lx\n", diff3);
printf("NextPtr - Xptr = 0x%lx\n\n", diff4);
diff1 = (unsigned long) TestArrayPtr - (unsigned long) TestArray;
diff2 = (unsigned long) Aptr - (unsigned long) TestArrayPtr;
diff3 = (unsigned long) Yptr - (unsigned long) Aptr;
diff4 = (unsigned long) NextPtr - (unsigned long) Yptr;
printf("&TestArray[3] - TestArray = 0x%lx\n", diff1);
printf("Aptr - &TestArray[3] = 0x%lx\n", diff2);
printf("Xptr - Aptr = 0x%lx\n", diff3);
printf("NextPtr - Xptr = 0x%lx\n\n", diff4);
return 0;
}
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