clang/test/CodeGen/2002-07-14-MiscListTests.c

   1 // RUN: %clang_cc1 -emit-llvm %s  -o /dev/null
   2
   3 // Test list stuff
   4
   5 void *malloc(unsigned);
   6
   7 // Test opaque structure support.  the list type is defined later
   8 struct list;
   9
  10 struct list *PassThroughList(struct list *L) {
  11   return L;
  12 }
  13
  14
  15 // Recursive data structure tests...
  16
  17 typedef struct list {
  18   int Data;
  19   struct list *Next;
  20 } list;
  21
  22 list *Data;
  23
  24 void foo(void) {
  25   static int Foo = 0;            // Test static local variable
  26   Foo += 1;                      // Increment static variable
  27
  28   Data = (list*)malloc(12);      // This is not a proper list allocation
  29 }
  30
  31 extern list ListNode1;
  32 list ListNode3 = { 4, 0          };
  33 list ListNode2 = { 3, &ListNode3 };
  34 list ListNode0 = { 1, &ListNode1 };
  35 list ListNode1 = { 2, &ListNode2 };
  36
  37
  38 list ListArray[10];
  39
  40 // Iterative insert fn
  41 void InsertIntoListTail(list **L, int Data) {
  42   while (*L)
  43     L = &(*L)->Next;
  44   *L = (list*)malloc(sizeof(list));
  45   (*L)->Data = Data;
  46   (*L)->Next = 0;
  47 }
  48
  49 // Recursive list search fn
  50 list *FindData(list *L, int Data) {
  51   if (L == 0) return 0;
  52   if (L->Data == Data) return L;
  53   return FindData(L->Next, Data);
  54 }
  55
  56 void foundIt(void);
  57
  58 // Driver fn...
  59 void DoListStuff(void) {
  60   list *MyList = 0;
  61   InsertIntoListTail(&MyList, 100);
  62   InsertIntoListTail(&MyList, 12);
  63   InsertIntoListTail(&MyList, 42);
  64   InsertIntoListTail(&MyList, 1123);
  65   InsertIntoListTail(&MyList, 1213);
  66
  67   if (FindData(MyList, 75)) foundIt();
  68   if (FindData(MyList, 42)) foundIt();
  69   if (FindData(MyList, 700)) foundIt();
  70 }
  71