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1// RUN: %clang_cc1 -fsyntax-only -verify %s2// expected-no-diagnostics3 4struct B {5  int x, y, z, w;6} b;7 8struct __attribute__((packed)) A {9  struct B b;10} a;11 12typedef __typeof__(sizeof(int)) size_t;13 14extern "C" {15void *memcpy(void *dest, const void *src, size_t n);16int memcmp(const void *s1, const void *s2, size_t n);17void *memmove(void *dest, const void *src, size_t n);18void *memset(void *s, int c, size_t n);19}20 21int x;22 23void foo() {24  memcpy(&a.b, &b, sizeof(b));25  memmove(&a.b, &b, sizeof(b));26  memset(&a.b, 0, sizeof(b));27  x = memcmp(&a.b, &b, sizeof(b));28}29