clang/test/Sema/address-packed-member-memops.c

   1 // RUN: %clang_cc1 -fsyntax-only -verify %s
   2 // expected-no-diagnostics
   3
   4 struct B {
   5   int x, y, z, w;
   6 } b;
   7
   8 struct __attribute__((packed)) A {
   9   struct B b;
  10 } a;
  11
  12 typedef __typeof__(sizeof(int)) size_t;
  13
  14 void *memcpy(void *dest, const void *src, size_t n);
  15 int memcmp(const void *s1, const void *s2, size_t n);
  16 void *memmove(void *dest, const void *src, size_t n);
  17 void *memset(void *s, int c, size_t n);
  18
  19 int x;
  20
  21 void foo(void) {
  22   memcpy(&a.b, &b, sizeof(b));
  23   memmove(&a.b, &b, sizeof(b));
  24   memset(&a.b, 0, sizeof(b));
  25   x = memcmp(&a.b, &b, sizeof(b));
  26 }