gistfile1.txt

Compiled with https://gcc.godbolt.org/ ARM gcc 4.8.2, flags -Os

void g(volatile int* p, volatile int* q)
{
  *p=0;
  *q=0;
}
void h(int* p, int* q)
{
  *p=0;
  *q=0;
}
void i(int* p, int* q)
{
  __atomic_store_n(p, 0, __ATOMIC_RELEASE);
  __atomic_store_n(q, 0, __ATOMIC_RELEASE);
}


g(int volatile*, int volatile*):
        movs    r3, #0
        str     r3, [r0]
        str     r3, [r1]
        bx      lr
h(int*, int*):
        movs    r3, #0
        str     r3, [r0]
        str     r3, [r1]
        bx      lr
i(int*, int*):
        dmb     ish
        movs    r3, #0
        str     r3, [r0]
        dmb     ish
        str     r3, [r1]
        bx      lr