Author: Timm Baeder Date: 2025-03-24T15:03:49+01:00 New Revision: f7aea4d081f77dba48b0fc019f59b678fb679aa8
URL: https://github.com/llvm/llvm-project/commit/f7aea4d081f77dba48b0fc019f59b678fb679aa8 DIFF: https://github.com/llvm/llvm-project/commit/f7aea4d081f77dba48b0fc019f59b678fb679aa8.diff LOG: [clang][bytecode] Implement __builtin_{wcscmp,wcsncmp} (#132723) Added: Modified: clang/lib/AST/ByteCode/InterpBuiltin.cpp clang/test/AST/ByteCode/builtin-functions.cpp Removed: ################################################################################ diff --git a/clang/lib/AST/ByteCode/InterpBuiltin.cpp b/clang/lib/AST/ByteCode/InterpBuiltin.cpp index 285ea7151a9cf..5ea1d36a148ae 100644 --- a/clang/lib/AST/ByteCode/InterpBuiltin.cpp +++ b/clang/lib/AST/ByteCode/InterpBuiltin.cpp @@ -212,11 +212,13 @@ static bool interp__builtin_strcmp(InterpState &S, CodePtr OpPC, const Pointer &A = getParam<Pointer>(Frame, 0); const Pointer &B = getParam<Pointer>(Frame, 1); - if (ID == Builtin::BIstrcmp || ID == Builtin::BIstrncmp) + if (ID == Builtin::BIstrcmp || ID == Builtin::BIstrncmp || + ID == Builtin::BIwcscmp || ID == Builtin::BIwcsncmp) diagnoseNonConstexprBuiltin(S, OpPC, ID); uint64_t Limit = ~static_cast<uint64_t>(0); - if (ID == Builtin::BIstrncmp || ID == Builtin::BI__builtin_strncmp) + if (ID == Builtin::BIstrncmp || ID == Builtin::BI__builtin_strncmp || + ID == Builtin::BIwcsncmp || ID == Builtin::BI__builtin_wcsncmp) Limit = peekToAPSInt(S.Stk, *S.getContext().classify(Call->getArg(2))) .getZExtValue(); @@ -231,6 +233,9 @@ static bool interp__builtin_strcmp(InterpState &S, CodePtr OpPC, if (A.isDummy() || B.isDummy()) return false; + bool IsWide = ID == Builtin::BIwcscmp || ID == Builtin::BIwcsncmp || + ID == Builtin::BI__builtin_wcscmp || + ID == Builtin::BI__builtin_wcsncmp; assert(A.getFieldDesc()->isPrimitiveArray()); assert(B.getFieldDesc()->isPrimitiveArray()); @@ -248,6 +253,21 @@ static bool interp__builtin_strcmp(InterpState &S, CodePtr OpPC, !CheckRange(S, OpPC, PB, AK_Read)) { return false; } + + if (IsWide) + INT_TYPE_SWITCH( + *S.getContext().classify(S.getASTContext().getWCharType()), { + T A = PA.deref<T>(); + T B = PB.deref<T>(); + if (A < B) { + pushInteger(S, -1, Call->getType()); + return true; + } else if (A > B) { + pushInteger(S, 1, Call->getType()); + return true; + } + }); + uint8_t CA = PA.deref<uint8_t>(); uint8_t CB = PB.deref<uint8_t>(); @@ -2120,6 +2140,10 @@ bool InterpretBuiltin(InterpState &S, CodePtr OpPC, const Function *F, case Builtin::BIstrcmp: case Builtin::BI__builtin_strncmp: case Builtin::BIstrncmp: + case Builtin::BI__builtin_wcsncmp: + case Builtin::BIwcsncmp: + case Builtin::BI__builtin_wcscmp: + case Builtin::BIwcscmp: if (!interp__builtin_strcmp(S, OpPC, Frame, F, Call)) return false; break; diff --git a/clang/test/AST/ByteCode/builtin-functions.cpp b/clang/test/AST/ByteCode/builtin-functions.cpp index 8cba1ec2e5b3b..f42ff49456af6 100644 --- a/clang/test/AST/ByteCode/builtin-functions.cpp +++ b/clang/test/AST/ByteCode/builtin-functions.cpp @@ -22,6 +22,8 @@ extern "C" { extern char *strchr(const char *s, int c); extern wchar_t *wmemchr(const wchar_t *s, wchar_t c, size_t n); extern wchar_t *wcschr(const wchar_t *s, wchar_t c); + extern int wcscmp(const wchar_t *s1, const wchar_t *s2); + extern int wcsncmp(const wchar_t *s1, const wchar_t *s2, size_t n); } namespace strcmp { @@ -66,6 +68,50 @@ namespace strcmp { static_assert(__builtin_strncmp("abab\0banana", "abab\0canada", 100) == 0); } +namespace WcsCmp { + constexpr wchar_t kFoobar[6] = {L'f',L'o',L'o',L'b',L'a',L'r'}; + constexpr wchar_t kFoobazfoobar[12] = {L'f',L'o',L'o',L'b',L'a',L'z',L'f',L'o',L'o',L'b',L'a',L'r'}; + + static_assert(__builtin_wcscmp(L"abab", L"abab") == 0); + static_assert(__builtin_wcscmp(L"abab", L"abba") == -1); + static_assert(__builtin_wcscmp(L"abab", L"abaa") == 1); + static_assert(__builtin_wcscmp(L"ababa", L"abab") == 1); + static_assert(__builtin_wcscmp(L"abab", L"ababa") == -1); + static_assert(__builtin_wcscmp(L"abab\0banana", L"abab") == 0); + static_assert(__builtin_wcscmp(L"abab", L"abab\0banana") == 0); + static_assert(__builtin_wcscmp(L"abab\0banana", L"abab\0canada") == 0); +#if __WCHAR_WIDTH__ == 32 + static_assert(__builtin_wcscmp(L"a\x83838383", L"a") == (wchar_t)-1U >> 31); +#endif + static_assert(__builtin_wcscmp(0, L"abab") == 0); // both-error {{not an integral constant}} \ + // both-note {{dereferenced null}} + static_assert(__builtin_wcscmp(L"abab", 0) == 0); // both-error {{not an integral constant}} \ + // both-note {{dereferenced null}} + + static_assert(__builtin_wcscmp(kFoobar, kFoobazfoobar) == -1); + static_assert(__builtin_wcscmp(kFoobar, kFoobazfoobar + 6) == 0); // both-error {{not an integral constant}} \ + // both-note {{dereferenced one-past-the-end}} + + static_assert(__builtin_wcsncmp(L"abaa", L"abba", 5) == -1); + static_assert(__builtin_wcsncmp(L"abaa", L"abba", 4) == -1); + static_assert(__builtin_wcsncmp(L"abaa", L"abba", 3) == -1); + static_assert(__builtin_wcsncmp(L"abaa", L"abba", 2) == 0); + static_assert(__builtin_wcsncmp(L"abaa", L"abba", 1) == 0); + static_assert(__builtin_wcsncmp(L"abaa", L"abba", 0) == 0); + static_assert(__builtin_wcsncmp(0, 0, 0) == 0); + static_assert(__builtin_wcsncmp(L"abab\0banana", L"abab\0canada", 100) == 0); +#if __WCHAR_WIDTH__ == 32 + static_assert(__builtin_wcsncmp(L"a\x83838383", L"aa", 2) == + (wchar_t)-1U >> 31); +#endif + + static_assert(__builtin_wcsncmp(kFoobar, kFoobazfoobar, 6) == -1); + static_assert(__builtin_wcsncmp(kFoobar, kFoobazfoobar, 7) == -1); + static_assert(__builtin_wcsncmp(kFoobar, kFoobazfoobar + 6, 6) == 0); + static_assert(__builtin_wcsncmp(kFoobar, kFoobazfoobar + 6, 7) == 0); // both-error {{not an integral constant}} \ + // both-note {{dereferenced one-past-the-end}} +} + /// Copied from constant-expression-cxx11.cpp namespace strlen { constexpr const char *a = "foo\0quux"; _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
