20031106-2.c

来自「Mac OS X 10.4.9 for x86 Source Code gcc」· C语言 代码 · 共 28 行

/* { dg-do compile } */ 
/* { dg-options "-O1 -fdump-tree-optimized" } */

extern void link_error (void);

/* Check for dead stores to a struct.  */

struct s
{
  char d;
  int a, b;
  double m;
};

void foo (struct s* teststruct)
{
  teststruct->a = 0;
  teststruct->a++;
  if (teststruct->a != 1)
    link_error ();
}

/* There should be only one reference to "teststruct".  */
/* { dg-final { scan-tree-dump-times "teststruct" 1 "optimized" { xfail *-*-* } } } */

/* There should be no link_error calls.  */
/* { dg-final { scan-tree-dump-times "link_error" 0 "optimized"} } */