test/FrontendC/2008-01-25-ZeroSizedAggregate.c

   1 // RUN: %llvmgcc %s -S -o -
   2
   3 // Aggregates of size zero should be dropped from argument list.
   4 typedef long int Tlong;
   5 struct S2411 {
   6   __attribute__((aligned)) Tlong:0;
   7 };
   8
   9 extern struct S2411 a2411[5];
  10 extern void checkx2411(struct S2411);
  11 void test2411(void) {
  12   checkx2411(a2411[0]);
  13 }
  14
  15 // Proper handling of zero sized fields during type conversion.
  16 typedef unsigned long long int Tal2ullong __attribute__((aligned(2)));
  17 struct S2525 {
  18  Tal2ullong: 0;
  19  struct {
  20  } e;
  21 };
  22 struct S2525 s2525;
  23
  24 struct {
  25   signed char f;
  26   char :0;
  27   struct{}h;
  28   char * i[5];
  29 } data;
  30
  31 // Taking address of a zero sized field.
  32 struct Z {};
  33 struct Y {
  34   int i;
  35   struct Z z;
  36 };
  37 void *f(struct Y *y) {
  38   return &y->z;
  39 }