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