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2013-02-12Perform placeholder conversions on the controller of a _GenericJohn McCall
expression. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@174930 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-10objective-C: Fixes a bogus warning due to not settingFariborz Jahanian
the "nonatomic" attribute in property redeclaration in class extension. Also, improved on diagnostics in this area while at it. // rdar://13156292 git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@174821 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-09QoI: -Wreadonly-iboutlet-property should have the warning's location on the ↵Ted Kremenek
property. There's no need to refer to the @implementation at all. Fixes <rdar://problem/13186515> git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@174802 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-08objective-C: don't issue bogus warning aboutFariborz Jahanian
"auto-synthesized may not work correctly with 'nib' loader" when 'readonly' property is redeclared 'readwrite' in class extension. // rdar://13123861 git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@174775 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-28Undo my re-wording of the "ARC forbids Objective-C objects in ..."Douglas Gregor
error. Jordan is right. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@173713 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-28Forbid the use of objects in unions in Objective-C++ ARC. FixesDouglas Gregor
<rdar://problem/13098104>. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@173708 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-22objectiveC (take two): don't warn when in -Wselector mode andFariborz Jahanian
an unimplemented selector is consumed by "respondsToSelector:". // rdar://12938616 git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@173179 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-21objectiveC: don't warn when in -Wselector mode andFariborz Jahanian
an unimplemented selector is consumed by "respondsToSelector:". // rdar://12938616 git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@173097 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-18When checking the parameter types of an Objective-C method, don'tDouglas Gregor
decay the parameter type immediately; let CheckParameter() do its job. Fixes <rdar://problem/12071218>. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@172780 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-17In Objective-C ARC, completely ignore ownership qualifiers on theDouglas Gregor
return type of a function by canonicalizing them away. They are useless anyway, and conflict with our rules for template argument deduction and __strong. Fixes <rdar://problem/12367446>. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@172768 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-16One can have an unavailable method overridden by an available method,Douglas Gregor
but not vice-versa. Fix bug introduced in r172567 and noticed by Jordan, thanks! git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@172586 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-15When checking availability attributes for consistency between anDouglas Gregor
overriding and overridden method, allow the overridden method to have a narrower contract (introduced earlier, deprecated/obsoleted later) than the overriding method. Fixes <rdar://problem/12992023>. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@172567 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-08Use Decl::getAvailability() rather than checking for the "unavailable"Douglas Gregor
attribute when determining whether we need to see an implementation of a property. Fixes <rdar://problem/12958191>. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@171877 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-07objective-C: when searching for declarations in protocolFariborz Jahanian
list of classes, etc., make sure to look into protocol definitions. // rdar://12958878 git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@171777 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-04Fix up various builtin declaration of objc_msgSend familiesFariborz Jahanian
to match those foung in objc.h an avoid spurious warnings. // rdar://12489098 git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@171492 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-03Fix capitalization of Objective-C in diagnostic.Ted Kremenek
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@171440 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-24Simplify RUN lines. No functionality change.Nick Lewycky
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@171045 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-21Change checkUnsafeAssignLiteral() to use the new Sema::CheckLiteralKind().Ted Kremenek
Along the way, fix a bug in CheckLiteralKind(), previously in diagnoseObjCLiteralComparison, where we didn't ignore parentheses in boxed expressions for purpose of classification. In other words, both @42 and @(42) should be classified as numeric literals. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@170931 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-21Extend checkUnsafeAssigns() to also handle assigning an object literal to a ↵Ted Kremenek
weak reference. Thanks to Jordan Rose and John McCall for their sage code review. Fixes <rdar://problem/12569201>. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@170864 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-20Revert "Warn if a __weak variable is initialized with an Objective-C object ↵Ted Kremenek
literal." Per code feedback, I want to see if there is a more general way to do this. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@170777 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-20Warn if a __weak variable is initialized with an Objective-C object literal.Ted Kremenek
Such variables may immediately become nil or may have unpredictable behavior. Fixes <rdar://problem/12569201>. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@170763 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-19objective-C: Don't warn of unimplemented property of protocols in Fariborz Jahanian
category, when those properties will be implemented in category's primary class or one of its super classes. // rdar://12568064 git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@170573 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-18The underlying type for an enum should be an integer type, not another enum.Eli Friedman
(This change only affects ObjC.) <rdar://problem/12857117>. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@170402 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-13objc: DOn't complain if a (SEL) expression is typecastFariborz Jahanian
to (SEL). Fixes // rdar://12859590 git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@170058 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-12[objc] For the ARC error that is emitted when a synthesized property ↵Argyrios Kyrtzidis
implementation has inconsistent ownership with the backing ivar, point the error location to the ivar. Pointing to the ivar (instead of the @synthesize) is better since this is where a fix is needed. Also provide the location of @synthesize via a note. This also fixes the problem where an auto-synthesized property would emit an error without any location. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@170039 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-11Don't complain about incomplete implementations for methods that areDouglas Gregor
unavailable due to availability attributes. <rdar://problem/12798237> git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@169903 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-05Format strings: offer a cast to 'unichar' for %C in Objective-C contexts.Jordan Rose
For most cases where a conversion specifier doesn't match an argument, we usually guess that the conversion specifier is wrong. However, if the argument is an integer type and the specifier is %C, it's likely the user really did mean to print the integer as a character. (This is more common than %c because there is no way to specify a unichar literal -- you have to write an integer literal, such as '0x2603', and then cast it to unichar.) This does not change the behavior of %S, since there are fewer cases where printing a literal Unicode *string* is necessary, but this could easily be changed in the future. <rdar://problem/11982013> git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@169400 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-29Fix crash-on-invalid. <rdar://problem/12765391>.Eli Friedman
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@168851 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-17objective-C: Do not issue deprecated warning about implementationFariborz Jahanian
of a deprecated method in original class (or category), only in overrides. // rdar://12717705 git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@168270 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-09-Wobjc-literal-compare: look through implicit casts.Jordan Rose
This warning was failing to fire under ARC because of the implicit lifetime casts added around the object literal expression. <rdar://problem/11300873>, again. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@167648 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-02Update test case.Ted Kremenek
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@167301 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-29-Warc-repeated-use-of-weak: allow single reads in loops from local variables.Jordan Rose
Previously, the warning would erroneously fire on this: for (Test *a in someArray) use(a.weakProp); ...because it looks like the same property is being accessed over and over. However, clearly this is not the case. We now ignore loops like this for local variables, but continue to warn if the base object is a parameter, global variable, or instance variable, on the assumption that these are not repeatedly usually assigned to within loops. Additionally, do-while loops where the condition is 'false' are not really loops at all; usually they're just used for semicolon-swallowing macros or using "break" like "goto". <rdar://problem/12578785&12578849> git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@166942 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-23Objective-C: check that when a category method is being implemented,Fariborz Jahanian
method type in cateogry matches the implementation. // rdar://12519216 git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@166518 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-19Allow objc_requires_super to be used to check class methods as well.Jordan Rose
Also, unify ObjCShouldCallSuperDealloc and ObjCShouldCallSuperFinalize. The two have identical behavior and will never be active at the same time. There's one last simplification now, which is that if we see a call to [super foo] and we are currently in a method named 'foo', we will /unconditionally/ clear the ObjCShouldCallSuper flag, rather than check first to see if we're in a method where calling super is required. There's no reason to pay the extra lookup price here. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@166285 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-19Prior to adding the new "expected-no-diagnostics" directive to ↵Andy Gibbs
VerifyDiagnosticConsumer, make the necessary adjustment to 580 test-cases which will henceforth require this new directive. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@166280 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-16Minor tweak to last patch along with a test case.Fariborz Jahanian
// rdar://12491143 git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@166030 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-11-Warc-repeated-use-of-weak: fix a use-of-uninitialized and add a test case.Jordan Rose
Fix-up for r165718, should get the buildbots back online. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@165723 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-11-Warc-repeated-use-of-weak: Don't warn on a single read followed by writes.Jordan Rose
This is a "safe" pattern, or at least one that cannot be helped by using a strong local variable. However, if the single read is within a loop, it should /always/ be treated as potentially dangerous. <rdar://problem/12437490> git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@165719 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-11-Warc-repeated-use-of-weak: Check messages to property accessors as well.Jordan Rose
Previously, [foo weakProp] was not being treated the same as foo.weakProp. Now, for every explicit message send, we check if it's a property access, and if so, if the property is weak. Then for every assignment of a message, we have to do the same thing again. This is a potentially expensive increase because determining whether a method is a property accessor requires searching through the methods it overrides. However, without it -Warc-repeated-use-of-weak will miss cases from people who prefer not to use dot syntax. If this turns out to be too expensive, we can try caching the result somewhere, or even lose precision by not checking superclass methods. The warning is off-by-default, though. <rdar://problem/12407765> git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@165718 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-10-Warc-repeated-use-of-weak: look through explicit casts on assigned values.Jordan Rose
Reading from a weak property, casting the result, and assigning to a strong pointer should still be considered safe. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@165629 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-10Move Sema::PropertyIfSetterOrGetter to ObjCMethodDecl::findPropertyDecl.Jordan Rose
Then, switch users of PropertyIfSetterOrGetter and LookupPropertyDecl (the latter by name) over to findPropertyDecl. This actually makes -Wreceiver-is-weak a bit stronger than it was before. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@165628 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-10Change Sema::PropertyIfSetterOrGetter to make use of isPropertyAccessor.Jordan Rose
Old algorithm: 1. See if the name looks like a getter or setter. 2. Use the name to look up a property in the current ObjCContainer and all its protocols. 3. If the current container is an interface, also look in all categories and superclasses (and superclass categories, and so on). New algorithm: 1. See if the method is marked as a property accessor. If so, look through all properties in the current container and find one that has a matching selector. 2. Find all overrides of the method using ObjCMethodDecl's getOverriddenMethods. This collects methods in superclasses and protocols (as well as superclass categories, which isn't really necessary), and checks if THEY are accessors. This part is not done recursively, since getOverriddenMethods is already recursive. This lets us handle getters and setters that do not match the property names. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@165627 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-03use ';' instead of '-' in the note part of my last patch.Fariborz Jahanian
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@165177 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-03Fix a typo in my last patch reported by Erik Schwiebert.Fariborz Jahanian
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@165142 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-03objective-C arc: Warn under arc about a use of an ivar inside a blockFariborz Jahanian
that doesn't have a 'self' as this implicitly captures 'self' and could create retain cycles. Provide fixit. // rdar://11194874 git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@165133 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-02Force triple in test to unbreak it on non-darwin platforms.Benjamin Kramer
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@164994 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-02Tweak diagnostic text to indicate that __weak on a local variable is only ↵Ted Kremenek
allowed for ARC. Fixes <rdar://problem/12407705> git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@164990 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-01availability in structured documents. TakesFariborz Jahanian
care of comments by Dimitri and Doug. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@164957 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-28-Wreceiver-is-weak: rephrase warning text and add a suggestion Note.Jordan Rose
New output: warning: weak property may be unpredictably set to nil note: property declared here note: assign the value to a strong variable to keep the object alive during use <rdar://problem/12277204> git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@164857 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-28-Warc-repeated-use-of-weak: check ivars and variables as well.Jordan Rose
Like properties, loading from a weak ivar twice in the same function can give you inconsistent results if the object is deallocated between the two loads. It is safer to assign to a strong local variable and use that. Second half of <rdar://problem/12280249>. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@164855 91177308-0d34-0410-b5e6-96231b3b80d8
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