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