From 952eddef9aff85b1e92626e89baaf7a360e2ac85 Mon Sep 17 00:00:00 2001 From: dim Date: Sun, 22 Dec 2013 00:07:40 +0000 Subject: Vendor import of clang release_34 branch r197841 (effectively, 3.4 RC3): https://llvm.org/svn/llvm-project/cfe/branches/release_34@197841 --- test/SemaCXX/constexpr-duffs-device.cpp | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) create mode 100644 test/SemaCXX/constexpr-duffs-device.cpp (limited to 'test/SemaCXX/constexpr-duffs-device.cpp') diff --git a/test/SemaCXX/constexpr-duffs-device.cpp b/test/SemaCXX/constexpr-duffs-device.cpp new file mode 100644 index 0000000..f77d989 --- /dev/null +++ b/test/SemaCXX/constexpr-duffs-device.cpp @@ -0,0 +1,32 @@ +// RUN: %clang_cc1 -std=c++1y -verify %s + +// expected-no-diagnostics +constexpr void copy(const char *from, unsigned long count, char *to) { + unsigned long n = (count + 7) / 8; + switch(count % 8) { + case 0: do { *to++ = *from++; + case 7: *to++ = *from++; + case 6: *to++ = *from++; + case 5: *to++ = *from++; + case 4: *to++ = *from++; + case 3: *to++ = *from++; + case 2: *to++ = *from++; + case 1: *to++ = *from++; + } while(--n > 0); + } +} + +struct S { + char stuff[14]; + constexpr S() : stuff{} { + copy("Hello, world!", 14, stuff); + } +}; + +constexpr bool streq(const char *a, const char *b) { + while (*a && *a == *b) ++a, ++b; + return *a == *b; +} + +static_assert(streq(S().stuff, "Hello, world!"), "should be same"); +static_assert(!streq(S().stuff, "Something else"), "should be different"); -- cgit v1.1