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2011-10-11Rename SemaCXXCast.cpp to SemaCast.cpp.John McCall
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@141686 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-06Move type-checking for C-style casts in C into the now-misnamed John McCall
SemaCXXCast.cpp. Should have no functionality change. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@141336 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-05Refactor the analysis of C++ cast expressions so that evenJohn McCall
C-style and functional casts are built in SemaCXXCast.cpp. Introduce a helper class to encapsulate most of the random state being passed around, at least one level down. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@141170 91177308-0d34-0410-b5e6-96231b3b80d8
2011-09-25Rename Diagnostic to DiagnosticsEngine as per issue 5397David Blaikie
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@140478 91177308-0d34-0410-b5e6-96231b3b80d8
2011-09-17Rename LangOptions::Microsoft to LangOptions::MicrosoftExt to make it clear ↵Francois Pichet
that this flag must be used only for Microsoft extensions and not emulation; to avoid confusion with the new LangOptions::MicrosoftMode flag. Many of the code now under LangOptions::MicrosoftExt will eventually be moved under the LangOptions::MicrosoftMode flag. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@139987 91177308-0d34-0410-b5e6-96231b3b80d8
2011-09-10When converting a block pointer to an Objective-C pointer type, extendJohn McCall
the lifetime of the block by copying it to the heap, or else we'll get a dangling reference because the code working with the non-block-typed object will not know it needs to copy. There is some danger here, e.g. with assigning a block literal to an unsafe variable, but, well, it's an unsafe variable. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@139451 91177308-0d34-0410-b5e6-96231b3b80d8
2011-09-09Give conversions of block pointers to ObjC pointers a different cast kindJohn McCall
than conversions of C pointers to ObjC pointers. In order to ensure that we've caught every case, add asserts to CastExpr that strictly determine which cast kind is used for which kind of bit cast. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@139352 91177308-0d34-0410-b5e6-96231b3b80d8
2011-09-02Make StmtDumper::VisitCXXFunctionalCastExpr dump the attached cast kind. ↵Eli Friedman
Fix the cast kind for a cast from floating-point to enum type. (The difference isn't actually visible, but that's just because IRGen is overly forgiving.) Per report by Enea Zaffanella on cfe-dev. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@139011 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-23remove unneeded llvm:: namespace qualifiers on some core types now that ↵Chris Lattner
LLVM.h imports them into the clang namespace. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@135852 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-08Remove unused variable.Benjamin Kramer
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@134731 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-08objc++-arc: more diagnosis of converting a weak-unavailableFariborz Jahanian
object to a __weak object type. // rdar://9732636 git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@134706 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-07objc++-arc: diagnose assignment/cast of a weak-unavailableFariborz Jahanian
object to a __weak object/type. // rdar://9732636. One item is yet todo. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@134655 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-01[ARC] When casting from a pointer to an objective-c object with known ↵Argyrios Kyrtzidis
ownership, if the cast type has no ownership specified, implicitly "transfer" the ownership of the cast'ed type to the cast type: id x; static_cast<NSString**>(&x); // Casting as (__strong NSString**). This currently only works for C++ named casts, C casts to follow. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@134273 91177308-0d34-0410-b5e6-96231b3b80d8
2011-06-21^cat^cast^Fariborz Jahanian
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@133529 91177308-0d34-0410-b5e6-96231b3b80d8
2011-06-21Add comment before CheckObjCARCConversion is called onFariborz Jahanian
Expr value not getting changed by this call. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@133527 91177308-0d34-0410-b5e6-96231b3b80d8
2011-06-21objc-arc: CodeGen part of unbridged cast of CF types.Fariborz Jahanian
// rdar://9474349 git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@133525 91177308-0d34-0410-b5e6-96231b3b80d8
2011-06-15Automatic Reference Counting.John McCall
Language-design credit goes to a lot of people, but I particularly want to single out Blaine Garst and Patrick Beard for their contributions. Compiler implementation credit goes to Argyrios, Doug, Fariborz, and myself, in no particular order. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@133103 91177308-0d34-0410-b5e6-96231b3b80d8
2011-06-05Remove all references to InitializationSequence::FailedSequence from outside ↵Sebastian Redl
SemaInit.cpp. Replace them with the boolean conversion or the new Failed() function. This is a first step towards removing InitializationSequence::SequenceKind. No functionality change. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@132664 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-24Fix a bug in -Wundefined-reinterpret-cast where we failed to lookChandler Carruth
through sugared types when testing for TagTypes. This was the actual cause of the only false positive in Clang+LLVM. Next evaluation will be over a much larger selection of code including large amounts of open source code. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@131957 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-20Introduce Type::isSignedIntegerOrEnumerationType() andDouglas Gregor
Type::isUnsignedIntegerOrEnumerationType(), which are like Type::isSignedIntegerType() and Type::isUnsignedIntegerType() but also consider the underlying type of a C++0x scoped enumeration type. Audited all callers to the existing functions, switching those that need to also handle scoped enumeration types (e.g., those that deal with constant values) over to the new functions. Fixes PR9923 / <rdar://problem/9447851>. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@131735 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-11In Microsoft mode, allow conversion from pointer to integral type no matter ↵Francois Pichet
what size the integral type is. Necessary to parse MFC code. Example: void f(char *ptr) { char var = (char)ptr; } git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@131201 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-02Add a warning for when reinterpret_cast leads to undefined behavior, patch ↵Argyrios Kyrtzidis
by Richard Trieu! git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@130703 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-26Make yet another placeholder type, this one marking that an expression is a ↵John McCall
bound member function, i.e. something of the form 'x.f' where 'f' is a non-static member function. Diagnose this in the general case. Some of the new diagnostics are probably worse than the old ones, but we now get this right much more universally, and there's certainly room for improvement in the diagnostics. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@130239 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-23Exhaust the cases.Argyrios Kyrtzidis
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@130043 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-22Don't allow reinterpret_cast to reference of vector element and property ↵Argyrios Kyrtzidis
expression. Thanks goes to Eli Friedman! git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@130036 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-22reinterpret_cast to reference of a bit-field is not allowed.Argyrios Kyrtzidis
Fixes rdar://9202628 & http://llvm.org/PR9564. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@130024 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-16Testing my commit access. A few whitespace changes to Sema/SemaCXXCast.cpp.Richard Trieu
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@129629 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-15Implement appropriate semantics for C++ casting and conversion whenDouglas Gregor
dealing with address-space- and GC-qualified pointers. Previously, these qualifiers were being treated just like cvr-qualifiers (in some cases) or were completely ignored, leading to uneven behavior. For example, const_cast would allow conversion between pointers to different address spaces. The new semantics are fairly simple: reinterpret_cast can be used to explicitly cast between pointers to different address spaces (including adding/removing addresss spaces), while static_cast/dynamic_cast/const_cast do not tolerate any changes in the address space. C-style casts can add/remove/change address spaces through the reinterpret_cast mechanism. Other non-CVR qualifiers (e.g., Objective-C GC qualifiers) work similarly. As part of this change, I tweaked the "casts away constness" diagnostic to use the term "casts away qualifiers". The term "constness" actually comes from the C++ standard, despite the fact that removing "volatile" also falls under that category. In Clang, we also have restrict, address spaces, ObjC GC attributes, etc., so the more general "qualifiers" is clearer. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@129583 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-11Remove CK_DynamicToNull.Anders Carlsson
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@129265 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-10As a first step towards fixing PR9641, add a CK_DynamicToNull cast kind whichAnders Carlsson
represents a dynamic cast where we know that the result is always null. For example: struct A { virtual ~A(); }; struct B final : A { }; struct C { }; bool f(B* b) { return dynamic_cast<C*>(b); } git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@129256 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-10Simplify calling CheckPlaceholderExpr, converge on it in a few places,John McCall
and move a vector-splat check to follow l-value conversion. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@129254 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-08Use ExprResult& instead of Expr *& in SemaJohn Wiegley
This patch authored by Eric Niebler. Many methods on the Sema class (e.g. ConvertPropertyForRValue) take Expr pointers as in/out parameters (Expr *&). This is especially true for the routines that apply implicit conversions to nodes in-place. This design is workable only as long as those conversions cannot fail. If they are allowed to fail, they need a way to report their failures. The typical way of doing this in clang is to use an ExprResult, which has an extra bit to signal a valid/invalid state. Returning ExprResult is de riguour elsewhere in the Sema interface. We suggest changing the Expr *& parameters in the Sema interface to ExprResult &. This increases interface consistency and maintainability. This interface change is important for work supporting MS-style C++ properties. For reasons explained here <http://lists.cs.uiuc.edu/pipermail/cfe-dev/2011-February/013180.html>, seemingly trivial operations like rvalue/lvalue conversions that formerly could not fail now can. (The reason is that given the semantics of the feature, getter/setter method lookup cannot happen until the point of use, at which point it may be found that the method does not exist, or it may have the wrong type, or overload resolution may fail, or it may be inaccessible.) git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@129143 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-07Basic, untested implementation for an "unknown any" type requested by LLDB.John McCall
The idea is that you can create a VarDecl with an unknown type, or a FunctionDecl with an unknown return type, and it will still be valid to access that object as long as you explicitly cast it at every use. I'm still going back and forth about how I want to test this effectively, but I wanted to go ahead and provide a skeletal implementation for the LLDB folks' benefit and because it also improves some diagnostic goodness for placeholder expressions. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@129065 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-27supported: AltiVec vector initialization with a single literal according to ↵Anton Yartsev
PIM section 2.5.1 - after initialization all elements have the value specified by the literal git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@128375 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-12Fixes for some more expressions containing function templateids thatDouglas Gregor
should be resolvable, from Faisal Vali! git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@127521 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-28Push nested-name-specifier source location information intoDouglas Gregor
UnresolvedLookupExpr and UnresolvedMemberExpr. Also, improve the computation that checks whether the base of a member expression (either unresolved or dependent-scoped) is implicit. The previous check didn't cover all of the cases we use in our representation, which threw off source-location information for these expressions (which, in turn, caused some breakage in libclang's token annotation). git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@126681 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-20Remove a dead variable.Daniel Dunbar
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@126073 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-19Handle the resolution of a reference to a function template (whichDouglas Gregor
includes explicitly-specified template arguments) to a function template specialization in cases where no deduction is performed or deduction fails. Patch by Faisal Vali, fixes PR7505! git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@126048 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-18Implement C++0x [expr.static.cast]p9, which permits explicitly castingDouglas Gregor
a scoped enumeration type to an integral or floating type, properly. There was an over-eager assertion, and it was missing the floating-point case. Fixes PR9107/<rdar://problem/8937402>. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@125825 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-14Don't crash on hierarchy static_casts which appear in variable initializers.John McCall
PR9221. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@125532 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-14Provide overload diagnostics when explicit casts involving class types fail.John McCall
PR8626. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@125506 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-27Fix a horrible bug in our handling of C-style casting, where a C-styleDouglas Gregor
derived-to-base cast that also casts away constness (one of the cases for static_cast followed by const_cast) would be treated as a bit-cast rather than a derived-to-base class, causing miscompiles and heartburn. Fixes <rdar://problem/8913298>. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@124340 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-26Handle C-style casts to rvalue reference types that cast away constness.Douglas Gregor
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@124319 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-25When performing a glvalue-to-xvalue static_cast that involves aDouglas Gregor
derived-to-base conversion, set the cast kind and base path appropriately. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@124189 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-22Update const_cast semantics for rvalue references. Add tests forDouglas Gregor
reinterpret_cast and const_cast using rvalue references. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@124007 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-22Teach static_cast and dynamic_cast about rvalue references.Douglas Gregor
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@124006 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-18Fix warnings found by gcc-4.6, from -Wunused-but-set-variable andJeffrey Yasskin
-Wint-to-pointer-cast. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@123719 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-12Add the location of the right parenthesis of a C++ named castDouglas Gregor
(static_cast, dynamic_cast, reinterpret_cast, or const_cast) to improve source-location information. Fixes PR8960. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@123336 91177308-0d34-0410-b5e6-96231b3b80d8
2010-12-23Change all self assignments X=X to (void)X, so that we can turn on aJeffrey Yasskin
new gcc warning that complains on self-assignments and self-initializations. Fix one bug found by the warning, in which one clang::OverloadCandidate constructor failed to initialize its FunctionTemplate member. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@122459 91177308-0d34-0410-b5e6-96231b3b80d8
2010-12-04Although we currently have explicit lvalue-to-rvalue conversions, they'reJohn McCall
not actually frequently used, because ImpCastExprToType only creates a node if the types differ. So explicitly create an ICE in the lvalue-to-rvalue conversion code in DefaultFunctionArrayLvalueConversion() as well as several other new places, and consistently deal with the consequences throughout the compiler. In addition, introduce a new cast kind for loading an ObjCProperty l-value, and make sure we emit those nodes whenever an ObjCProperty l-value appears that's not on the LHS of an assignment operator. This breaks a couple of rewriter tests, which I've x-failed until future development occurs on the rewriter. Ted Kremenek kindly contributed the analyzer workarounds in this patch. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@120890 91177308-0d34-0410-b5e6-96231b3b80d8
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