1// RUN: %clang_cc1 -std=c++1y -verify %s
2
3// expected-no-diagnostics
4constexpr void copy(const char *from, unsigned long count, char *to) {
5        unsigned long n = (count + 7) / 8;
6        switch(count % 8) {
7        case 0: do {    *to++ = *from++;
8        case 7:         *to++ = *from++;
9        case 6:         *to++ = *from++;
10        case 5:         *to++ = *from++;
11        case 4:         *to++ = *from++;
12        case 3:         *to++ = *from++;
13        case 2:         *to++ = *from++;
14        case 1:         *to++ = *from++;
15                } while(--n > 0);
16        }
17}
18
19struct S {
20  char stuff[14];
21  constexpr S() : stuff{} {
22    copy("Hello, world!", 14, stuff);
23  }
24};
25
26constexpr bool streq(const char *a, const char *b) {
27  while (*a && *a == *b) ++a, ++b;
28  return *a == *b;
29}
30
31static_assert(streq(S().stuff, "Hello, world!"), "should be same");
32static_assert(!streq(S().stuff, "Something else"), "should be different");
33