gcc/testsuite/gcc.dg/darwin-aligned-globals.c

   1 /* { dg-do compile { target *-*-darwin* } } */
   2 /* { dg-additional-options "-fcommon" } */
   3
   4 /* Test alignment rules which differ for earlier hosts (so we must
   5    work on the principle that this test will be exercised by self-
   6    hosted compilers. */
   7
   8 #if __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ >= 1070
   9 #define align_OK (1ul << 28)
  10 #define align_BAD (1ul << 29)
  11 #else
  12 #define align_OK (1ul << 15)
  13 #define align_BAD (1ul << 16)
  14 #endif
  15
  16 /* All non common vars are allowed larger alignment on modern systems.  */
  17 static int xn __attribute__ ((aligned (align_OK)));
  18 static int xi __attribute__ ((aligned (align_OK))) = 5  ;
  19 int gxi __attribute__ ((aligned (align_OK))) = 6 ;
  20
  21 /* test that we detect bad cases.  */
  22 static int yn __attribute__ ((aligned (align_BAD))); /* { dg-error {requested alignment .[0-9]+. exceeds object file maximum} } */
  23 static int yi __attribute__ ((aligned (align_BAD))) = 5;  /* { dg-error {requested alignment .[0-9]+. exceeds object file maximum} } */
  24 int yni __attribute__ ((aligned (align_BAD))) = 6;  /* { dg-error {requested alignment .[0-9]+. exceeds object file maximum} } */