gcc/testsuite/c-c++-common/Wreturn-local-addr.c

   1 /* PR c/90737 - inconsistent address of a local converted to intptr_t
   2    between callee and caller
   3    { dg-do compile }
   4    { dg-options "-O1 -Wall -Wreturn-local-addr -fdump-tree-optimized" } */
   5
   6 typedef __INTPTR_TYPE__ intptr_t;
   7
   8 static inline intptr_t
   9 return_addr_local_as_int (void)
  10 {
  11   int i;
  12   if ((intptr_t)&i == 0)
  13     __builtin_abort ();
  14
  15   return (intptr_t)&i;
  16 }
  17
  18 void get_addr_local_as_int (void)
  19 {
  20   intptr_t i = return_addr_local_as_int ();
  21   if (i == 0)
  22     __builtin_abort ();
  23 }
  24
  25
  26 static inline intptr_t
  27 return_addr_label_as_int (void)
  28 {
  29  label:
  30   if ((intptr_t)&&label == 0)
  31     __builtin_abort ();
  32
  33   return (intptr_t)&&label;
  34 }
  35
  36 void get_addr_label_as_int (void)
  37 {
  38   intptr_t i = return_addr_label_as_int ();
  39   if (i == 0)
  40     __builtin_abort ();
  41 }
  42
  43 /* Verify that the functions that return the address of the label
  44    or local variable have been optimized away and so have the calls
  45    to abort.
  46   { dg-final { scan-tree-dump-not "return_addr_" "optimized" } }
  47   { dg-final { scan-tree-dump-not "abort" "optimized" } } */