Simple test for constant expressions constructed from global addresses.

llvm-svn: 3956

llvm/test/Regression/LLC/globalrefs.c

@@ -0,0 +1,40 @@
+/* globalrefs.c - Test constant expressions constructed from global
+ * addresses and index expressions into global addresses.
+ * 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;
+
+struct test* TestArrayPtr = TestArray; 
+long*        Aptr         = &Test1.A;
+unsigned*    Xptr         = &Test1.S.X;
+
+int
+main(int argc, char** argv)
+{
+  void* a1 = (void*) TestArrayPtr;
+  void* a2 = (void*) Aptr;
+  void* a3 = (void*) Xptr;
+
+#ifdef WANT_ABSOLUTE_ADDRESSES
+  printf("Aptr = 0x%lx, Xptr = 0x%lx, TestArrayPtr = 0x%lx\n",
+         Aptr, Xptr, TestArrayPtr);
+#endif
+
+  printf("Aptr - TestArrayPtr = 0x%lx, Xptr - Aptr = 0x%lx\n",
+         (uint64_t) a2 - (uint64_t) a1, (uint64_t) a3 - (uint64_t) a2);
+  return 0;
+}