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2012-08-17c: implement gcc's -Wbad-function-cast which warnsFariborz Jahanian
on unsafe cast of a c-function call. This is a C-only option. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@162109 91177308-0d34-0410-b5e6-96231b3b80d8
2012-08-17Define __builtin_ffs[ll] with a signed argument instead of unsigned.Benjamin Kramer
GCC documents these as unsigned, but defines them as signed. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@162106 91177308-0d34-0410-b5e6-96231b3b80d8
2012-08-17Add support for "type safety" attributes that allow checking that 'void *'Dmitri Gribenko
function arguments and arguments for variadic functions are of a particular type which is determined by some other argument to the same function call. Usecases include: * MPI library implementations, where these attributes enable checking that buffer type matches the passed MPI_Datatype; * for HDF5 library there is a similar usecase as MPI; * checking types of variadic functions' arguments for functions like fcntl() and ioctl(). git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@162067 91177308-0d34-0410-b5e6-96231b3b80d8
2012-08-16objective-C++: issue diagnostic when ivar type isFariborz Jahanian
an abstract c++ class. // rdar://12095239 git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@162052 91177308-0d34-0410-b5e6-96231b3b80d8
2012-08-16objective-C: make -Wcast-of-sel-type the default.Fariborz Jahanian
// rdar://12107381 git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@162045 91177308-0d34-0410-b5e6-96231b3b80d8
2012-08-16objective-C: deprecate casts of ObjC's SELFariborz Jahanian
expressions except to void, void * and their qualified versions. // rdar://12107381 git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@162036 91177308-0d34-0410-b5e6-96231b3b80d8
2012-08-15Patch to warn about __private_extern__ on tentative definitionsFariborz Jahanian
as it does something unexpected (but gcc compatible). Suggest use of __attribute__((visibility("hidden"))) on declaration instead. // rdar://7703982 git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@161972 91177308-0d34-0410-b5e6-96231b3b80d8
2012-08-15Check for improper use of 'static' and type qualifiers in arrayHans Wennborg
declarators. They are only allowed for function parameters, and then only on the outermost array type derivation. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@161934 91177308-0d34-0410-b5e6-96231b3b80d8
2012-08-14Fix undefined behavior: don't bind a dereferenced null pointer to a reference.Richard Smith
No functionality change. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@161832 91177308-0d34-0410-b5e6-96231b3b80d8
2012-08-10Check access to friend declarations. There's a number of differentJohn McCall
things going on here that were problematic: - We were missing the actual access check, or rather, it was suppressed on account of being a redeclaration lookup. - The access check would naturally happen during delay, which isn't appropriate in this case. - We weren't actually emitting dependent diagnostics associated with class templates, which was unfortunate. - Access was being propagated incorrectly for friend method declarations that couldn't be matched at parse-time. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@161652 91177308-0d34-0410-b5e6-96231b3b80d8
2012-08-08Address code review comments for Wstrncat-size warning (r161440).Anna Zaks
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@161527 91177308-0d34-0410-b5e6-96231b3b80d8
2012-08-08Implement warning for integral null pointer constants other than the literal 0.David Blaikie
This is effectively a warning for code that violates core issue 903 & thus will become standard error in the future, hopefully. It catches strange null pointers such as: '\0', 1 - 1, const int null = 0; etc... There's currently a flaw in this warning (& the warning for 'false' as a null pointer literal as well) where it doesn't trigger on comparisons (ptr == '\0' for example). Fix to come in a future patch. Also, due to this only being a warning, not an error, it triggers quite frequently on gtest code which tests expressions for null-pointer-ness in a SFINAE context (so it wouldn't be a problem if this was an error as in an actual implementation of core issue 903). To workaround this for now, the diagnostic does not fire in unevaluated contexts. Review by Sean Silva and Richard Smith. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@161501 91177308-0d34-0410-b5e6-96231b3b80d8
2012-08-07Turn on strncat-size warning implemented a while ago.Anna Zaks
Warns on anti-patterns/typos in the 'size' argument to strncat. The correct size argument should look like the following: - strncat(dst, src, sizeof(dst) - strlen(dest) - 1); We warn on: - sizeof(dst) - sizeof(src) - sizeof(dst) - strlen(dst) - sizeof(src) - anything (This has been implemented in void Sema::CheckStrncatArguments().) git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@161440 91177308-0d34-0410-b5e6-96231b3b80d8
2012-08-07Enhance ClangDiagnosticsEmitter to reject diagnostics that are errors that ↵Ted Kremenek
are also included in warning groups. Warning groups can only contain warnings, because only warnings can be mapped to errors or ignored. This caught a few diagnostics that were incorrectly in diagnostic groups, and could have resulted in a compiler crash when those diagnostic groups were mapped. Fixes <rdar://problem/12044436> git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@161389 91177308-0d34-0410-b5e6-96231b3b80d8
2012-08-07Remove two fall through diagnostics from the IgnoredAttributes group, since ↵Ted Kremenek
they are errors, not warnings. Only warnings should be in warning groups. This was causing an assertion failure in code using pragmas to map -Wignored-attributes to ignored, but this kind of diagnostic mapping is disallowed for builtin errors. We should just wire up tablegen to reject errors being in diagnostic groups. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@161376 91177308-0d34-0410-b5e6-96231b3b80d8
2012-08-06objective-c: Implement gcc's -Wdirect-ivar-access option.Fariborz Jahanian
// rdar://6505197 git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@161362 91177308-0d34-0410-b5e6-96231b3b80d8
2012-08-06Fix MIPS DSP Rev1 intrinsics memory properties.Simon Atanasyan
The patch reviewed by Akira Hatanaka. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@161333 91177308-0d34-0410-b5e6-96231b3b80d8
2012-08-06Comment diagnostics: warn on duplicate \brief and \return commands.Dmitri Gribenko
Doxygen manual claims that multiple \brief or \returns commands will be merged together, but actual behavior is different (second \brief command becomes a part of a discussion, second \returns becomes a "Returns: blah" paragraph on its own). Anyway, it seems to be a bad idea to use multiple \brief or \returns commands in a single command. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@161325 91177308-0d34-0410-b5e6-96231b3b80d8
2012-08-06Comment diagnostics: \return in void function: specialize diagnostic text forDmitri Gribenko
ObjC methods. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@161324 91177308-0d34-0410-b5e6-96231b3b80d8
2012-08-06Re-enable pcmpistri/pcmpestri builtins in clang now that llvm supports them ↵Craig Topper
properly. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@161319 91177308-0d34-0410-b5e6-96231b3b80d8
2012-08-06PR13529: Don't crash if the driver sees an unused input file when running asRichard Smith
'clang-cpp'. For now, the test uses "REQUIRES: shell" to determine if the host system supports "ln -s", which it uses to create a 'clang-cpp' symlink. This is a bit hacky and should likely be directly supported by lit.cfg. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@161317 91177308-0d34-0410-b5e6-96231b3b80d8
2012-08-05Add __builtin_readcyclecounter() to produce the @llvm.readcyclecounter() ↵Hal Finkel
intrinsic. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@161310 91177308-0d34-0410-b5e6-96231b3b80d8
2012-08-03Comment diagnostics: warn if \returns is used in a non-function comment or ifDmitri Gribenko
the function returns void. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@161261 91177308-0d34-0410-b5e6-96231b3b80d8
2012-07-31Comment parsing: add support for \tparam command on all levels.Dmitri Gribenko
The only caveat is renumbering CXCommentKind enum for aesthetic reasons -- this breaks libclang binary compatibility, but should not be a problem since API is so new. This also fixes PR13372 as a side-effect. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@161087 91177308-0d34-0410-b5e6-96231b3b80d8
2012-07-31Fixes a segfault in Tooling when using pch's:Manuel Klimek
Clear the FileManager's stat cache in between running translation units, as the stat cache loaded from a pch is only valid for one compiler invocation. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@161047 91177308-0d34-0410-b5e6-96231b3b80d8
2012-07-31Introduce new queries on ObjCRuntime for how to interpret subscriptsJohn McCall
on object pointers and whether pointer arithmetic on object pointers is supported. Make ObjFW interpret subscripts as pseudo-objects. Based on a patch by Jonathan Schleifer. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@161028 91177308-0d34-0410-b5e6-96231b3b80d8
2012-07-30Improvements to vexing-parse warnings. Make the no-parameters case moreRichard Smith
accurate by asking the parser whether there was an ambiguity rather than trying to reverse-engineer it from the DeclSpec. Make the with-parameters case have better diagnostics by using semantic information to drive the warning, improving the diagnostics and adding a fixit. Patch by Nikola Smiljanic. Some minor changes by me to suppress diagnostics for declarations of the form 'T (*x)(...)', which seem to have a very high false positive rate, and to reduce indentation in 'warnAboutAmbiguousFunction'. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@160998 91177308-0d34-0410-b5e6-96231b3b80d8
2012-07-30objective-c arc: ARC IRGen correctly assumes resultFariborz Jahanian
type of generated call to super dealloc is 'void' and asserts if user's dealloc is not of 'void type. This rule must be enforced in clang front-end (with a fixit) if this is not the case, instead of asserting in CodeGen. // rdar://11987838 git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@160993 91177308-0d34-0410-b5e6-96231b3b80d8
2012-07-30Do not warn on correct use of the '%n' format specifier.Matt Beaumont-Gay
While '%n' can be used for evil in an attacker-controlled format string, there isn't any acute danger in using it in a literal format string with an argument of the appropriate type. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@160984 91177308-0d34-0410-b5e6-96231b3b80d8
2012-07-29Microoptimize isOffsetInFileID a bit.Benjamin Kramer
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@160928 91177308-0d34-0410-b5e6-96231b3b80d8
2012-07-27Add a function to convert a single Unicode code point to a UTF8 sequence.Dmitri Gribenko
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@160890 91177308-0d34-0410-b5e6-96231b3b80d8
2012-07-27Final piece of core issue 1330: delay computing the exception specification ofRichard Smith
a defaulted special member function until the exception specification is needed (using the same criteria used for the delayed instantiation of exception specifications for function temploids). EST_Delayed is now EST_Unevaluated (using 1330's terminology), and, like EST_Uninstantiated, carries a pointer to the FunctionDecl which will be used to resolve the exception specification. This is enabled for all C++ modes: it's a little faster in the case where the exception specification isn't used, allows our C++11-in-C++98 extensions to work, and is still correct for C++98, since in that mode the computation of the exception specification can't fail. The diagnostics here aren't great (in particular, we should include implicit evaluation of exception specifications for defaulted special members in the template instantiation backtraces), but they're not much worse than before. Our approach to the problem of cycles between in-class initializers and the exception specification for a defaulted default constructor is modified a little by this change -- we now reject any odr-use of a defaulted default constructor if that constructor uses an in-class initializer and the use is in an in-class initialzer which is declared lexically earlier. This is a closer approximation to the current draft solution in core issue 1351, but isn't an exact match (but the current draft wording isn't reasonable, so that's to be expected). git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@160847 91177308-0d34-0410-b5e6-96231b3b80d8
2012-07-25Turn -Wobjc-root-class on by default. <rdar://problem/11203649>.Ted Kremenek
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@160707 91177308-0d34-0410-b5e6-96231b3b80d8
2012-07-25Promote warn_unknown_analyzer_checker to an error. Addresses ↵Ted Kremenek
<rdar://problem/10987863>. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@160706 91177308-0d34-0410-b5e6-96231b3b80d8
2012-07-24Comment diagnostics: add warning for multiple \param commands with duplicateDmitri Gribenko
parameter names. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@160696 91177308-0d34-0410-b5e6-96231b3b80d8
2012-07-24Tweak warning text for returning incomplete type from extern "C" functions.Hans Wennborg
A warning was added in r150128 for returning non-C compatible user-defined types from functions with C linkage. This makes the text more clear for the case when the type isn't decidedly non-C compatible, but incomplete. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@160681 91177308-0d34-0410-b5e6-96231b3b80d8
2012-07-24Emit debug info for dynamic initializers. Permit __attribute__((nodebug)) onNick Lewycky
variables that have static storage duration, it removes debug info on the emitted initializer function but not all debug info about this variable. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@160659 91177308-0d34-0410-b5e6-96231b3b80d8
2012-07-23Fix a typo (the the => the)Sylvestre Ledru
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@160622 91177308-0d34-0410-b5e6-96231b3b80d8
2012-07-23Add diagnostics for comma at end of enum and for extra semicolon at namespaceRichard Smith
scope to -Wc++11-extensions. Move extra semicolon after member function definition diagnostic out of -pedantic, since C++ allows a single semicolon there. Keep it in -Wextra-semi, though, since it's still questionable. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@160618 91177308-0d34-0410-b5e6-96231b3b80d8
2012-07-22char16_t and char32_t are defined via typedef in MSVC 11 RC. So introduce a ↵Francois Pichet
way to disable keywords under Microsoft mode. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@160612 91177308-0d34-0410-b5e6-96231b3b80d8
2012-07-19For varargs, diagnose passing ObjC objects by value like other non-POD types.Jordan Rose
While we still want to consider this a hard error (non-POD variadic args are normally a DefaultError warning), delaying the diagnostic allows us to give better error messages, which also match the usual non-POD errors more closely. In addition, this change improves the diagnostic messages for format string argument type mismatches by passing down the type of the callee, so we can say "variadic method" or "variadic function" appropriately. <rdar://problem/11825593> git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@160517 91177308-0d34-0410-b5e6-96231b3b80d8
2012-07-19Capitalize "Objective-C" and "C++" in user-facing contexts.Jordan Rose
No functionality change. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@160516 91177308-0d34-0410-b5e6-96231b3b80d8
2012-07-19Define __FINITE_MATH_ONLY__ based on -ffast-math and -ffinite-math-only.Bob Wilson
This macro was being unconditionally set to zero, preceded by a FIXME comment. This fixes <rdar://problem/11845441>. Patch by Michael Gottesman! git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@160491 91177308-0d34-0410-b5e6-96231b3b80d8
2012-07-17Adding a fixit for includes that cannot be found with angle brackets, but ↵Aaron Ballman
can be found with quoted strings instead. Implements PR13201. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@160406 91177308-0d34-0410-b5e6-96231b3b80d8
2012-07-17Issue warning when assigning out-of-range integer values to enums.Fariborz Jahanian
Due to performance cost, this is an opt-in option placed under -Wassign-enum. // rdar://11824807 git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@160382 91177308-0d34-0410-b5e6-96231b3b80d8
2012-07-17Add -Wobjc-string-compare under -Wobjc-literal-compare.Jordan Rose
Suggested by Ted, since string literal comparison is at least slightly more sensible than comparison of runtime literals. (Ambiguous language on developer.apple.com implies that strings are guaranteed to be uniqued within a translation unit and possibly across a linked binary.) git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@160378 91177308-0d34-0410-b5e6-96231b3b80d8
2012-07-17Now that -Wobjc-literal-compare is a warning, put the fixit on a note.Jordan Rose
Recovering as if the user had actually called -isEqual: is a bit too far from the semantics of the program as written, /even though/ it's probably what they intended. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@160377 91177308-0d34-0410-b5e6-96231b3b80d8
2012-07-16Add two more missing parameters in diagnostics.Daniel Jasper
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@160264 91177308-0d34-0410-b5e6-96231b3b80d8
2012-07-16Fix diagnostic adding missing parameter.Daniel Jasper
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@160263 91177308-0d34-0410-b5e6-96231b3b80d8
2012-07-14Update Sema diagnostic messages to take advantage of template type diffing.Richard Trieu
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@160210 91177308-0d34-0410-b5e6-96231b3b80d8
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