cast-align1.c

来自「linux下编程用 编译软件」· C语言 代码 · 共 28 行

// { dg-do assemble { target sparc-*-* } }
// { dg-options "-ansi -pedantic-errors -Wcast-align" }


// Copyright (C) 1999 Free Software Foundation, Inc.
// Contributed by Nathan Sidwell 7 Dec 1999 <[e-mail]>

// converting a T * to void * does not need a complete T, and doesn't
// increase alignment requirements.

struct X;
struct Y;
struct Z {double m;};

void f3 (X *xp, Z *zp)
{
  (void *)xp;
  (void *)zp;
  (Y *)xp;
  (Y *)zp;
  (Z *)xp;
}

void f4 (char *ptr)
{
  (Z *)ptr;           // { dg-warning "" } alignment
}