gcc/testsuite/gcc.dg/pr103184-1.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2" } */
   3
   4 extern char foo;
   5 extern unsigned char bar;
   6
   7 int
   8 foo1 (void)
   9 {
  10   return __sync_fetch_and_and (&foo, ~1) & 1;
  11 }
  12
  13 int
  14 foo2 (void)
  15 {
  16   return __sync_fetch_and_or (&foo, 1) & 1;
  17 }
  18
  19 int
  20 foo3 (void)
  21 {
  22   return __sync_fetch_and_xor (&foo, 1) & 1;
  23 }
  24
  25 unsigned short
  26 bar1 (void)
  27 {
  28   return __sync_fetch_and_and (&bar, ~1) & 1;
  29 }
  30
  31 unsigned short
  32 bar2 (void)
  33 {
  34   return __sync_fetch_and_or (&bar, 1) & 1;
  35 }
  36
  37 unsigned short
  38 bar3 (void)
  39 {
  40   return __sync_fetch_and_xor (&bar, 1) & 1;
  41 }
  42
  43 /* { dg-final { scan-assembler-times "lock;?\[ \t\]*cmpxchgb" 6 { target { x86_64-*-* i?86-*-* } } } } */