gcc/testsuite/gcc.target/i386/pr70821.c

   1 /* PR target/70821 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-Os" } */
   4 /* { dg-additional-options "-march=i686" { target ia32 } } */
   5
   6 void bar (void);
   7
   8 void
   9 foo (int *p)
  10 {
  11   if (__atomic_sub_fetch (p, 1, __ATOMIC_SEQ_CST))
  12     bar ();
  13 }
  14
  15 /* { dg-final { scan-assembler "lock;? dec" } } */
  16 /* { dg-final { scan-assembler-not "lock;? xadd" } } */