gcc/testsuite/gcc.dg/tm/memopt-12.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-fgnu-tm -O -fdump-tree-tmmark" } */
   3
   4 extern int test(void) __attribute__((transaction_safe));
   5 extern int something (void);
   6 extern void *malloc (__SIZE_TYPE__) __attribute__((malloc,transaction_safe));
   7
   8 struct large { int foo[500]; };
   9
  10 int f()
  11 {
  12   int *p1, *p2, *p3;
  13
  14   p1 = malloc (sizeof (*p1)*5000);
  15   __transaction_atomic {
  16     *p1 = 0;
  17
  18     p2 = malloc (sizeof (*p2)*6000);
  19     *p2 = 1;
  20
  21     /* p3 = PHI (p1, p2) */
  22     if (test())
  23       p3 = p1;
  24     else
  25       p3 = p2;
  26
  27     /* Since both p1 and p2 are thread-private, we can inherit the
  28        logging already done.  No ITM_W* instrumentation necessary.  */
  29     *p3 = 555;
  30   }
  31   return p3[something()];
  32 }
  33
  34 /* { dg-final { scan-tree-dump-times "ITM_WU" 0 "tmmark" } } */