gcc/testsuite/gcc.dg/tm/alias-1.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-fgnu-tm -fdump-tree-ealias -O" } */
   3
   4 typedef __UINTPTR_TYPE__ ptrcast;
   5
   6 #if (__SIZEOF_POINTER__ == 4)
   7 #define TM_LOAD  __builtin__ITM_RU4
   8 #define TM_STORE __builtin__ITM_WU4
   9 #elif (__SIZEOF_POINTER__ == 8)
  10 #define TM_LOAD __builtin__ITM_RU8
  11 #define TM_STORE __builtin__ITM_WU8
  12 #else
  13 #error Add target support here
  14 #endif
  15
  16 struct mystruct_type {
  17   ptrcast *ptr;
  18 } *mystruct;
  19
  20 ptrcast *someptr, **pp;
  21 ptrcast ui;
  22
  23 void f(void)
  24 {
  25   __transaction_atomic {
  26     ui = TM_LOAD  (&mystruct);
  27     mystruct = (struct mystruct_type *) ui;
  28     ui = TM_LOAD  (&someptr);
  29     someptr = (ptrcast *) ui;
  30     ui = (ptrcast) someptr;
  31     pp = &mystruct->ptr;
  32     TM_STORE (pp, ui);
  33   }
  34 }
  35
  36 /* { dg-final { scan-tree-dump-times "mystruct = \{ .*ESCAPED" 1 "ealias" } } */
  37 /* { dg-final { scan-tree-dump-times "someptr = .*same as mystruct" 1 "ealias" } } */
  38 /* { dg-final { scan-tree-dump-times "ui\..* = .*same as mystruct" 1 "ealias" } } */
  39 /* { dg-final { scan-tree-dump-times "pp\..* = .*same as mystruct" 1 "ealias" } } */