32 lines · c
1// RUN: %clang_cc1 -emit-llvm < %s -o -2 3// A nice and complicated initialization example with unions from Python4typedef int Py_ssize_t;5 6typedef union _gc_head {7 struct {8 union _gc_head *gc_next;9 union _gc_head *gc_prev;10 Py_ssize_t gc_refs;11 } gc;12 long double dummy; /* force worst-case alignment */13} PyGC_Head;14 15struct gc_generation {16 PyGC_Head head;17 int threshold; /* collection threshold */18 int count; /* count of allocations or collections of younger19 generations */20};21 22#define NUM_GENERATIONS 323#define GEN_HEAD(n) (&generations[n].head)24 25/* linked lists of container objects */26struct gc_generation generations[NUM_GENERATIONS] = {27 /* PyGC_Head, threshold, count */28 {{{GEN_HEAD(0), GEN_HEAD(0), 0}}, 700, 0},29 {{{GEN_HEAD(1), GEN_HEAD(1), 0}}, 10, 0},30 {{{GEN_HEAD(2), GEN_HEAD(2), 0}}, 10, 0},31};32