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


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/* PR target/70821 */
/* { dg-do compile } */
/* { dg-options "-Os" } */
/* { dg-additional-options "-march=i686" { target ia32 } } */

void bar (void);

void
foo (int *p)
{
  if (__atomic_sub_fetch (p, 1, __ATOMIC_SEQ_CST))
    bar ();
}

/* { dg-final { scan-assembler "lock;? dec" } } */
/* { dg-final { scan-assembler-not "lock;? xadd" } } */