Douglas Gregor [Fri, 10 Feb 2012 09:26:04 +0000 (09:26 +0000)]
Add various tests for captures and the reaching scope of the lambda
expression. Implement C++11 [expr.prim.lambda]p12's requirement that
capturing a variable will odr-use it.
Douglas Gregor [Fri, 10 Feb 2012 07:45:31 +0000 (07:45 +0000)]
Extend CXXRecordDecl with a function that determines the mapping from
the variables captured by a lambda to the fields that store the
captured values. To be used in IRgen.
Richard Smith [Fri, 10 Feb 2012 07:41:06 +0000 (07:41 +0000)]
Update to new resolution for DR1458. When taking the address of an object of
incomplete class type which has an overloaded operator&, it's now just
unspecified whether the overloaded operator or the builtin is used.
David Blaikie [Fri, 10 Feb 2012 05:15:16 +0000 (05:15 +0000)]
Move -Wswitch from -Wmost to -Wall, consitent with GCC.
This is a relatively noisy warning for a codebase not explicitly designed for
it (effectively enforcing a stylistic constraint about the use of defaults
in switches over enums) & there's nothing Clang does to clean up the noise
when compared to GCC's implementation so the same decision seems suitable.
Ted Kremenek [Fri, 10 Feb 2012 02:45:47 +0000 (02:45 +0000)]
Revert r145999. This turned out to be a bad idea. Unfortunately, 'id' is used so profusely
in many APIs and large codebases that this made the deprecated warning trigger happy to
the point of not being useful.
objc: If a method is not implemented in the category implementation but
has been declared in its primary class, superclass,
or in one of their protocols, no need to issue unimplemented method.
// rdar://10823023
Akira Hatanaka [Thu, 9 Feb 2012 19:54:16 +0000 (19:54 +0000)]
Class objects passed by value follow the same rules as structure objects.
Double fields of by-value class objects should be passed in floating point
registers.
Douglas Gregor [Thu, 9 Feb 2012 10:18:50 +0000 (10:18 +0000)]
Implement return type deduction for lambdas per C++11
[expr.prim.lambda]p4, including the current suggested resolution of
core isue 975, which allows multiple return statements so long as the
types match. ExtWarn when user code is actually making use of this
extension.
Douglas Gregor [Thu, 9 Feb 2012 08:52:43 +0000 (08:52 +0000)]
Restore the appropriate lexical declaration context for a lambda's
function call operator (to the lambda class). This allows us to IRgen
calls to simple (non-capturing) lambdas, e.g.,
[](int i, int j) -> int { return i + j; }(1, 2)
Eli will be providing test cases as he brings up more IRgen.
Douglas Gregor [Thu, 9 Feb 2012 08:14:43 +0000 (08:14 +0000)]
Implement C++ [expr.prim.lambda]p2, which bans lambda expressions in
unevaluated operands. Be certain that we're marking everything
referenced within a capture initializer as odr-used.
We were passing a decl to the consumer after all pending deserializations were finished
but this was not enough; due to processing by the consumer we may end up into yet another
deserialization process but the way FinishedDeserializing() was setup we would not ensure
that everything was fully deserialized before returning to the consumer.
Separate ASTReader::FinishedDeserializing() into two semantic actions.
The first is ensuring that a deserialization process ends up will fully deserialized decls/types even
if the process is started by the consumer.
The second is pushing "interesting" decls to the consumer; we make sure that we don't re-enter this
section recursively be checking a variable.
Don't cache the artificial type for the this pointer, there's no
difference in the qual type. This is a workaround for the fact that
the type isn't artificial but the this decl is, however, we don't
have any way of representing it in the current metadata. For now,
however, just don't cache the full type.
Fixes rdar://10831526 and probably a couple of others.
Richard Smith [Thu, 9 Feb 2012 06:40:58 +0000 (06:40 +0000)]
DR1359: A constexpr constructor does not need to initialize an empty struct or
empty union. This still rejects anonymous member structs or unions which only
contain such empty class types, pending standard wording defining exactly what
an empty class type is.
[PCH] Set the DeclContext before doing any deserialization, to make sure internal
calls to Decl::getASTContext() by Decl's methods will find the TranslationUnitDecl
without crashing due to a parent declaration context still deserializing.
David Blaikie [Thu, 9 Feb 2012 03:57:02 +0000 (03:57 +0000)]
Correct comment Clang C++ use in production.
This was from way-back-when (r82583) when Clang's C++ support wasn't prime-time
yet. Production quality C++ was tested experimentally from r100119 and turned
on by default in r141063.
[PCH] Avoid using Decl::setAttrs() and Decl::setLexicalDeclContext() from the ASTReaderDecl
directly; they internally call Decl::getASTContext() which may crash if a declaration context
parent is still deserializing.
Douglas Gregor [Thu, 9 Feb 2012 00:47:04 +0000 (00:47 +0000)]
Various interrelated cleanups for lambdas:
- Complete the lambda class when we finish the lambda expression
(previously, it was left in the "being completed" state)
- Actually return the LambdaExpr object and bind to the resulting
temporary when needed.
- Detect when cleanups are needed while capturing a variable into a
lambda (e.g., due to default arguments in the copy constructor), and
make sure those cleanups apply for the whole of the lambda
expression.
Anna Zaks [Wed, 8 Feb 2012 23:16:56 +0000 (23:16 +0000)]
[analyzer] MallocChecker: implement pessimistic version of the checker,
which allows values to escape through unknown calls.
Assumes all calls but the malloc family are unknown.
Also, catch a use-after-free when a pointer is passed to a
function after a call to free (previously, you had to explicitly
dereference the pointer value).
Douglas Gregor [Wed, 8 Feb 2012 20:56:50 +0000 (20:56 +0000)]
When computing the type of a local variable reference within a lambda,
only add 'const' for variables captured by copy in potentially
evaluated expressions of non-mutable lambdas. (The "by copy" part was
missing).
Richard Smith [Wed, 8 Feb 2012 08:11:33 +0000 (08:11 +0000)]
Implement DR1458: Taking the address of an object of incomplete class type is
not a constant expression, because we can't tell whether the complete class type
will have an overloaded operator&.
Richard Smith [Wed, 8 Feb 2012 06:14:53 +0000 (06:14 +0000)]
Implement the agreed resolution to DR1457: a signed left shift of a 1 bit into
the sign bit doesn't have undefined behavior, but a signed left shift of a 1 bit
out of the sign bit still does. As promised to Howard :)
The suppression of the potential constant expression checking in system headers
is also removed, since the problem it was working around is gone.
Ted Kremenek [Wed, 8 Feb 2012 05:08:58 +0000 (05:08 +0000)]
Move -Wcovered-switch-default out of -Wswitch (and -Wall), and make it an opt-in warning.
This is a great warning, but it was observed that a ton of real world code violates
it all the time for (semi-)legitimate reasons. This warnings is fairly pedantic, which is good,
but not for everyone. For example, there is a fair amount of idiomatic code out there
that does "default: abort()", and similar idioms.
Ted Kremenek [Wed, 8 Feb 2012 04:32:34 +0000 (04:32 +0000)]
Change PathDiagnosticPieces to be reference counted (simplifying their management), and introduce 'PathPieces' as a common container for PathDiagnosticPieces.
[libclang] For CXXOperatorCallExprs, give a valid source location to the DeclRefExpr
that is referencing the member function, so we can index the referenced function.
John McCall [Wed, 8 Feb 2012 00:46:36 +0000 (00:46 +0000)]
Revise the SplitQualType interface to make it its own thing instead of
a typedef of std::pair. This slightly improves type-safety, but mostly
makes code using it clearer to read as well as making it possible to add
methods to the type.
Add such a method for efficiently single-step desugaring a split type.
Add a method to single-step desugaring a locally-unqualified type.
Implement both the SplitQualType and QualType methods in terms of that.
Sean Callanan [Wed, 8 Feb 2012 00:04:52 +0000 (00:04 +0000)]
If a struct needs to be laid out, and it has not
been completed yet, then complete it if possible.
This fixes some assertion failures encountered by
LLDB.
Benjamin Kramer [Tue, 7 Feb 2012 22:29:24 +0000 (22:29 +0000)]
Revert my patches which removed Diagnostic.h includes by moving some operator overloads out of line.
This seems to negatively affect compile time onsome ObjC tests
(which use a lot of partial diagnostics I assume). I have to come
up with a way to keep them inline without including Diagnostic.h
everywhere. Now adding a new diagnostic requires a full rebuild
of e.g. the static analyzer which doesn't even use those diagnostics.
Chad Rosier [Tue, 7 Feb 2012 19:55:45 +0000 (19:55 +0000)]
In r149662, setDiagnosticMapping was modified to not allow warnings mapped to
MAP_ERROR to be remapped to MAP_WARNING. These new APIs are being added to
allow the diagnostic mapping's "no Werror" bit to be set, and potentially
downgrade anything already mapped to be a warning.
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