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cd334b8dc6
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4125 91177308-0d34-0410-b5e6-96231b3b80d8
70 lines
2.1 KiB
C
70 lines
2.1 KiB
C
/* globalrefs.c - Test symbolic constant expressions constructed from
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* global addresses and index expressions into global addresses.
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* Do this both with global constants and with inline constant.
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* Instead of printing absolute addresses, print out the differences in
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* memory addresses to get output that matches that of the native compiler.
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*/
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#include <stdio.h>
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#define __STDC_LIMIT_MACROS 1
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#include <inttypes.h>
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struct test {
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long A;
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struct { unsigned X; unsigned Y; } S;
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struct test* next;
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};
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struct test TestArray[10];
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struct test Test1;
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/* Create global symbolic constants from the addresses of the above globals */
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struct test* TestArrayPtr = &TestArray[3];
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long* Aptr = &Test1.A;
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unsigned* Yptr = &Test1.S.Y;
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struct test** NextPtr = &Test1.next;
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void
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printdiff(void* p1, void* p2)
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{
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printf(" 0x%lx", (unsigned long) p1 - (unsigned long) p2);
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}
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int
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main(int argc, char** argv)
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{
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unsigned long diff1, diff2, diff3, diff4;
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printf("sizeof(struct Test) = %llu\n\n", sizeof(struct test));
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printdiff(&TestArray[3], TestArray);
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printdiff(&Test1.A, &TestArray[3]);
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printdiff(&Test1.S.Y, &Test1.A);
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printdiff(&Test1.next, &Test1.S.Y);
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printf("\n");
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diff1 = (unsigned long) &TestArray[3] - (unsigned long) TestArray;
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diff2 = (unsigned long) &Test1.A - (unsigned long) &TestArray[3];
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diff3 = (unsigned long) &Test1.S.Y - (unsigned long) &Test1.A;
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diff4 = (unsigned long) &Test1.next - (unsigned long) &Test1.S.Y;
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printf("&TestArray[3] - TestArray = 0x%lx\n", diff1);
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printf("Aptr - &TestArray[3] = 0x%lx\n", diff2);
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printf("Xptr - Aptr = 0x%lx\n", diff3);
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printf("NextPtr - Xptr = 0x%lx\n\n", diff4);
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diff1 = (unsigned long) TestArrayPtr - (unsigned long) TestArray;
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diff2 = (unsigned long) Aptr - (unsigned long) TestArrayPtr;
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diff3 = (unsigned long) Yptr - (unsigned long) Aptr;
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diff4 = (unsigned long) NextPtr - (unsigned long) Yptr;
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printf("&TestArray[3] - TestArray = 0x%lx\n", diff1);
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printf("Aptr - &TestArray[3] = 0x%lx\n", diff2);
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printf("Xptr - Aptr = 0x%lx\n", diff3);
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printf("NextPtr - Xptr = 0x%lx\n\n", diff4);
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return 0;
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}
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