gcc/testsuite/gcc.dg/tree-ssa/tailcall-7.c

   1 /* { dg-do compile { target trampolines } } */
   2 /* { dg-options "-O2 -fdump-tree-tailc-details" } */
   3
   4 struct s { int x; };
   5 struct s f (int);
   6 struct s global;
   7 void callit (void (*) (void));
   8
   9 /* Tail call.  */
  10 void
  11 g1 (void)
  12 {
  13   f (1);
  14 }
  15
  16 /* Not a tail call.  */
  17 void
  18 g2 (void)
  19 {
  20   global = f (2);
  21 }
  22
  23 /* Not a tail call.  */
  24 void
  25 g3 (struct s *ptr)
  26 {
  27   *ptr = f (3);
  28 }
  29
  30 /* Tail call.  */
  31 struct s
  32 g4 (struct s param)
  33 {
  34   param = f (4);
  35   return param;
  36 }
  37
  38 /* Tail call.  */
  39 struct s
  40 g5 (void)
  41 {
  42   struct s local = f (5);
  43   return local;
  44 }
  45
  46 /* Tail call.  */
  47 struct s
  48 g6 (void)
  49 {
  50   return f (6);
  51 }
  52
  53 /* Not a tail call.  */
  54 struct s
  55 g7 (void)
  56 {
  57   struct s local = f (7);
  58   global = local;
  59   return local;
  60 }
  61
  62 /* Not a tail call.  */
  63 struct s
  64 g8 (struct s *ptr)
  65 {
  66   struct s local = f (8);
  67   *ptr = local;
  68   return local;
  69 }
  70
  71 /* Not a tail call.  */
  72 int
  73 g9 (struct s param)
  74 {
  75   void inner (void) { param = f (9); }
  76   callit (inner);
  77   return 9;
  78 }
  79
  80 /* Tail call.  */
  81 int
  82 g10 (int param)
  83 {
  84   void inner (void) { f (param); }
  85   callit (inner);
  86   return 10;
  87 }
  88
  89 /* { dg-final { scan-tree-dump-times "Found tail call" 5 "tailc" } } */