inline_asm-2.c

来自「用于进行gcc测试」· C语言 代码 · 共 19 行

/* { dg-do compile } */
/* { dg-options "-O1 -fdump-tree-salias-vops" } */
/* Test to make sure that inline-asm causes a V_MAY_DEF. */


void link_error();
void f(char *a)
{
  int *a1 = (int *)a;
  if (*a == 0)
   asm("":"=m"(*a1));
  if (*a == 0)
   link_error ();
}

/* There should a VDEF for the inline-asm and one for the link_error.  */
/* { dg-final { scan-tree-dump-times "VDEF" 2 "salias"} } */
/* { dg-final { cleanup-tree-dump "salias" } } */