1 // RUN: %clang_cc1 -emit-llvm < %s -o - 2 3 // A nice and complicated initialization example with unions from Python 4 typedef int Py_ssize_t; 5 6 typedef 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 15 struct gc_generation { 16 PyGC_Head head; 17 int threshold; /* collection threshold */ 18 int count; /* count of allocations or collections of younger 19 generations */ 20 }; 21 22 #define NUM_GENERATIONS 3 23 #define GEN_HEAD(n) (&generations[n].head) 24 25 /* linked lists of container objects */ 26 struct 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