+++ /dev/null
-/*
- This test checks promotion of bitfields. Bitfields should be promoted
- very much like chars and shorts:
-
- Bitfields (signed or unsigned) should be promoted to signed int if their
- value will fit in a signed int, otherwise to an unsigned int if their
- value will fit in an unsigned int, otherwise we don't promote them (ANSI/ISO
- does not specify the behavior of bitfields larger than an unsigned int).
-
- We test the behavior by subtracting two from the promoted value: this will
- result in a negitive value for signed types, a positive value for unsigned
- types. This test (of course) assumes that the compiler is correctly
- implementing signed and unsigned arithmetic.
- */
-
-struct X {
- unsigned int u3:3;
- signed long int s31:31;
- signed long int s32:32;
- unsigned long int u31:31;
- unsigned long int u32:32;
- unsigned long long ull3 :3;
- unsigned long long ull35:35;
- unsigned u15:15;
-};
-
-struct X x;
-
-main ()
-{
- if ((x.u3 - 2) >= 0) /* promoted value should be signed */
- abort ();
-
- if ((x.s31 - 2) >= 0) /* promoted value should be signed */
- abort ();
-
- if ((x.s32 - 2) >= 0) /* promoted value should be signed */
- abort ();
-
- if ((x.u15 - 2) >= 0) /* promoted value should be signed */
- abort ();
-
- /* Conditionalize check on whether integers are 4 bytes or larger, i.e.
- larger than a 31 bit bitfield. */
- if (sizeof (int) >= 4)
- {
- if ((x.u31 - 2) >= 0) /* promoted value should be signed */
- abort ();
- }
- else
- {
- if ((x.u31 - 2) < 0) /* promoted value should be UNsigned */
- abort ();
- }
-
- if ((x.u32 - 2) < 0) /* promoted value should be UNsigned */
- abort ();
-
- if ((x.ull3 - 2) >= 0) /* promoted value should be signed */
- abort ();
-
- if ((x.ull35 - 2) < 0) /* promoted value should be UNsigned */
- abort ();
-
- exit (0);
-}