diff options
Diffstat (limited to 'test/SemaCXX/constexpr-string.cpp')
| -rw-r--r-- | test/SemaCXX/constexpr-string.cpp | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/test/SemaCXX/constexpr-string.cpp b/test/SemaCXX/constexpr-string.cpp index c348c0ff74..f540be8f8e 100644 --- a/test/SemaCXX/constexpr-string.cpp +++ b/test/SemaCXX/constexpr-string.cpp @@ -1,7 +1,9 @@ // RUN: %clang_cc1 %s -triple x86_64-linux-gnu -std=c++2a -fsyntax-only -verify -pedantic -Wno-vla-extension +// RUN: %clang_cc1 %s -triple x86_64-linux-gnu -std=gnu++2a -fsyntax-only -verify -pedantic -Wno-vla-extension -DGNUMODE // RUN: %clang_cc1 %s -triple x86_64-linux-gnu -std=c++2a -fsyntax-only -verify -pedantic -Wno-vla-extension -fno-signed-char // RUN: %clang_cc1 %s -triple x86_64-linux-gnu -std=c++2a -fsyntax-only -verify -pedantic -Wno-vla-extension -fno-wchar -DNO_PREDEFINED_WCHAR_T // RUN: %clang_cc1 %s -triple armebv7-unknown-linux -std=c++2a -fsyntax-only -verify -pedantic -Wno-vla-extension +// RUN: %clang_cc1 %s -triple armebv7-unknown-linux -std=gnu++2a -fsyntax-only -verify -pedantic -Wno-vla-extension -DGNUMODE // RUN: %clang_cc1 %s -triple armebv7-unknown-linux -std=c++2a -fsyntax-only -verify -pedantic -Wno-vla-extension -fno-signed-char // RUN: %clang_cc1 %s -triple armebv7-unknown-linux -std=c++2a -fsyntax-only -verify -pedantic -Wno-vla-extension -fno-wchar -DNO_PREDEFINED_WCHAR_T @@ -15,6 +17,10 @@ extern "C" { extern int strncmp(const char *s1, const char *s2, size_t n); extern int memcmp(const void *s1, const void *s2, size_t n); +#ifdef GNUMODE + extern int bcmp(const void *s1, const void *s2, size_t n); +#endif + extern char *strchr(const char *s, int c); extern void *memchr(const void *s, int c, size_t n); @@ -101,12 +107,28 @@ namespace StrcmpEtc { static_assert(__builtin_memcmp("abab\0banana", "abab\0canada", 6) == -1); static_assert(__builtin_memcmp("abab\0banana", "abab\0canada", 5) == 0); + static_assert(__builtin_bcmp("abaa", "abba", 3) != 0); + static_assert(__builtin_bcmp("abaa", "abba", 2) == 0); + static_assert(__builtin_bcmp("a\203", "a", 2) != 0); + static_assert(__builtin_bcmp("a\203", "a\003", 2) != 0); + static_assert(__builtin_bcmp(0, 0, 0) == 0); + static_assert(__builtin_bcmp("abab\0banana", "abab\0banana", 100) == 0); // expected-error {{not an integral constant}} expected-note {{dereferenced one-past-the-end}} + static_assert(__builtin_bcmp("abab\0banana", "abab\0canada", 100) != 0); // FIXME: Should we reject this? + static_assert(__builtin_bcmp("abab\0banana", "abab\0canada", 7) != 0); + static_assert(__builtin_bcmp("abab\0banana", "abab\0canada", 6) != 0); + static_assert(__builtin_bcmp("abab\0banana", "abab\0canada", 5) == 0); + extern struct Incomplete incomplete; static_assert(__builtin_memcmp(&incomplete, "", 0u) == 0); static_assert(__builtin_memcmp("", &incomplete, 0u) == 0); static_assert(__builtin_memcmp(&incomplete, "", 1u) == 42); // expected-error {{not an integral constant}} expected-note {{read of incomplete type 'struct Incomplete'}} static_assert(__builtin_memcmp("", &incomplete, 1u) == 42); // expected-error {{not an integral constant}} expected-note {{read of incomplete type 'struct Incomplete'}} + static_assert(__builtin_bcmp(&incomplete, "", 0u) == 0); + static_assert(__builtin_bcmp("", &incomplete, 0u) == 0); + static_assert(__builtin_bcmp(&incomplete, "", 1u) == 42); // expected-error {{not an integral constant}} expected-note {{read of incomplete type 'struct Incomplete'}} + static_assert(__builtin_bcmp("", &incomplete, 1u) == 42); // expected-error {{not an integral constant}} expected-note {{read of incomplete type 'struct Incomplete'}} + constexpr unsigned char ku00fe00[] = {0x00, 0xfe, 0x00}; constexpr unsigned char ku00feff[] = {0x00, 0xfe, 0xff}; constexpr signed char ks00fe00[] = {0, -2, 0}; @@ -121,11 +143,24 @@ namespace StrcmpEtc { static_assert(__builtin_memcmp(ks00feff, ks00fe00, 99) == 1); static_assert(__builtin_memcmp(ks00fe00, ks00feff, 99) == -1); + static_assert(__builtin_bcmp(ku00feff, ks00fe00, 2) == 0); + static_assert(__builtin_bcmp(ku00feff, ks00fe00, 99) != 0); + static_assert(__builtin_bcmp(ku00fe00, ks00feff, 99) != 0); + static_assert(__builtin_bcmp(ks00feff, ku00fe00, 2) == 0); + static_assert(__builtin_bcmp(ks00feff, ku00fe00, 99) != 0); + static_assert(__builtin_bcmp(ks00fe00, ku00feff, 99) != 0); + static_assert(__builtin_bcmp(ks00fe00, ks00feff, 2) == 0); + static_assert(__builtin_bcmp(ks00feff, ks00fe00, 99) != 0); + static_assert(__builtin_bcmp(ks00fe00, ks00feff, 99) != 0); + struct Bool3Tuple { bool bb[3]; }; constexpr Bool3Tuple kb000100 = {{false, true, false}}; static_assert(sizeof(bool) != 1u || __builtin_memcmp(ks00fe00, kb000100.bb, 1) == 0); static_assert(sizeof(bool) != 1u || __builtin_memcmp(ks00fe00, kb000100.bb, 2) == 1); + static_assert(sizeof(bool) != 1u || __builtin_bcmp(ks00fe00, kb000100.bb, 1) == 0); + static_assert(sizeof(bool) != 1u || __builtin_bcmp(ks00fe00, kb000100.bb, 2) != 0); + constexpr long ksl[] = {0, -1}; constexpr unsigned int kui[] = {0, 0u - 1}; constexpr unsigned long long kull[] = {0, 0ull - 1}; @@ -148,9 +183,23 @@ namespace StrcmpEtc { static_assert(__builtin_memcmp(ksl + 1, kuSizeofLong() + 1, sizeof(long) + 0) == 0); static_assert(__builtin_memcmp(ksl + 1, kuSizeofLong() + 1, sizeof(long) + 1) == 42); // expected-error {{not an integral constant}} expected-note {{dereferenced one-past-the-end}} + static_assert(__builtin_bcmp(ksl, kuSizeofLong(), sizeof(long) - 1) == 0); + static_assert(__builtin_bcmp(ksl, kuSizeofLong(), sizeof(long) + 0) == 0); + static_assert(__builtin_bcmp(ksl, kuSizeofLong(), sizeof(long) + 1) == 0); + static_assert(__builtin_bcmp(ksl, kuSizeofLong(), 2*sizeof(long) - 1) == 0); + static_assert(__builtin_bcmp(ksl, kuSizeofLong(), 2*sizeof(long) + 0) == 0); + static_assert(__builtin_bcmp(ksl, kuSizeofLong(), 2*sizeof(long) + 1) == 42); // expected-error {{not an integral constant}} expected-note {{dereferenced one-past-the-end}} + static_assert(__builtin_bcmp(ksl + 1, kuSizeofLong() + 1, sizeof(long) - 1) == 0); + static_assert(__builtin_bcmp(ksl + 1, kuSizeofLong() + 1, sizeof(long) + 0) == 0); + static_assert(__builtin_bcmp(ksl + 1, kuSizeofLong() + 1, sizeof(long) + 1) == 42); // expected-error {{not an integral constant}} expected-note {{dereferenced one-past-the-end}} + constexpr int a = strcmp("hello", "world"); // expected-error {{constant expression}} expected-note {{non-constexpr function 'strcmp' cannot be used in a constant expression}} constexpr int b = strncmp("hello", "world", 3); // expected-error {{constant expression}} expected-note {{non-constexpr function 'strncmp' cannot be used in a constant expression}} constexpr int c = memcmp("hello", "world", 3); // expected-error {{constant expression}} expected-note {{non-constexpr function 'memcmp' cannot be used in a constant expression}} + +#ifdef GNUMODE + constexpr int d = bcmp("hello", "world", 3); // expected-error {{constant expression}} expected-note {{non-constexpr function 'bcmp' cannot be used in a constant expression}} +#endif } namespace MultibyteElementTests { |