Ted Kremenek [Fri, 12 Oct 2012 22:56:42 +0000 (22:56 +0000)]
Silence static analyzer issue by documenting that in this context
that a DeclRefExpr can never return a null decl. We possibly should
hoist this into getDecl() itself.
Ted Kremenek [Fri, 12 Oct 2012 22:56:33 +0000 (22:56 +0000)]
Silence dead store warning. It is conceptually possible we will
add more code that references SourceFile, so removing the dead store
doesn't seem appropriate for the long term.
Douglas Gregor [Fri, 12 Oct 2012 21:15:50 +0000 (21:15 +0000)]
Sanitize the names of modules determined based on the names of headers
or directories, to make sure that they are identifiers that are not
keywords in any dialect. Fixes <rdar://problem/12489495>.
David Blaikie [Fri, 12 Oct 2012 20:00:44 +0000 (20:00 +0000)]
Fix typo correction of one qualified name to another.
When suggesting "foo::bar" as a correction for "fob::bar" we mistakenly
replaced only "bar" with "foo::bar" producing "fob::foo::bar" which was broken.
This corrects that replacement in as many places as I could find & provides
test cases for all those cases I could find a test case for. There are a couple
that don't seem to be reachable (one looks entirely dead, the other just
doesn't seem to ever get called with a namespace to namespace change).
Review by Richard Smith ( http://llvm-reviews.chandlerc.com/D57 ).
Bill Schmidt [Fri, 12 Oct 2012 19:26:17 +0000 (19:26 +0000)]
This patch addresses PR13948.
For 64-bit PowerPC SVR4, an aggregate containing only one
floating-point field (float, double, or long double) must be passed in
a register as though just that field were present. This patch
addresses the issue during Clang code generation by specifying in the
ABIArgInfo for the argument that the underlying type is passed
directly in a register. The included test case verifies flat and
nested structs for the three data types.
Sean Silva [Thu, 11 Oct 2012 23:31:18 +0000 (23:31 +0000)]
Add missing classof().
Somewhat troublingly, without this implemented, the check inside
isa_impl<> would silently use the parent's `classof()` when determining
whether it was okay to downcast from the parent to the child!
Bug analysis:
A build failure after removing the parent's `classof()` initially
alerted me to the bug, after which a little bit of thinking and reading
of the code identified the root cause.
The compiler could be made to prevent this bug from happening if there
were a way to ensure that in the code
that `To::classof` is actually inside the class `To`, and not in a base
class. I am not aware of a way to check this in C++. If there is a means
to perform that check, please bring it up on the list and this will be
fixed.
There is a high likelihood that there are other instances of this same
bug in the codebase.
David Blaikie [Thu, 11 Oct 2012 22:55:07 +0000 (22:55 +0000)]
Provide a fixit when taking the address of an unqualified member function.
This only applies if the type has a name. (we could potentially do something
crazy with decltype in C++11 to qualify members of unnamed types but that
seems excessive)
It might be nice to also suggest a fixit for "&this->i", "&foo->i",
and "&foo.i" but those expressions produce 'bound' member functions that have
a different AST representation & make error recovery a little trickier. Left
as future work.
Douglas Gregor [Thu, 11 Oct 2012 21:07:39 +0000 (21:07 +0000)]
Diagnose the expansion of ambiguous macro definitions. This can happen
only with modules, when two disjoint modules #define the same
identifier to different token sequences.
[libclang] Make sure the index_data.main_filename field is initialized
in c-index-test. index_enteredMainFile is not invoked when indexing a
module file.
Jordan Rose [Thu, 11 Oct 2012 16:10:19 +0000 (16:10 +0000)]
-Warc-repeated-use-of-weak: Don't warn on a single read followed by writes.
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.
Jordan Rose [Thu, 11 Oct 2012 16:06:21 +0000 (16:06 +0000)]
-Warc-repeated-use-of-weak: Check messages to property accessors as well.
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.
[libclang] Improve AST serialization done by ASTUnit::Save().
The ASTUnit needs to initialize an ASTWriter at the beginning of
parsing to fully handle serialization of a translation unit that
imports modules. Do this by introducing an option to enable it, which
corresponds to CXTranslationUnit_ForSerialization on the C API side.
Douglas Gregor [Thu, 11 Oct 2012 00:51:27 +0000 (00:51 +0000)]
Remove the ASTDeserializationListener's MacroVisible() callback, which
is no longer necessary, as well as the little bit of infrastructure in
the AST writer that used it.
Douglas Gregor [Thu, 11 Oct 2012 00:46:49 +0000 (00:46 +0000)]
Deserialize macro history when we deserialize an identifier that has
macro history.
When deserializing macro history, we arrange history such that the
macros that have definitions (that haven't been #undef'd) and are
visible come at the beginning of the list, which is what the
preprocessor and other clients of Preprocessor::getMacroInfo()
expect. If additional macro definitions become visible later, they'll
be moved toward the front of the list. Note that it's possible to have
ambiguities, but we don't diagnose them yet.
There is a partially-implemented design decision here that, if a
particular identifier has been defined or #undef'd within the
translation unit, that definition (or #undef) hides any macro
definitions that come from imported modules. There's still a little
work to do to ensure that the right #undef'ing happens.
Additionally, we'll need to scope the update records for #undefs, so
they only kick in when the submodule containing that update record
becomes visible.
objective-C IRgen: When sending a method to 'super'
in a category class method, don't read 'isa' pointer. Instead,
save the desired OBJC_METACLASS_$_ClassName in
__DATA,__objc_superrefs and read that without reading any
isa pointers. // rdar://12459358
Eric Christopher [Wed, 10 Oct 2012 22:49:05 +0000 (22:49 +0000)]
Temporarily Revert "[analyzer] Treat fields of unions as having symbolic offsets."
Author: Jordan Rose <jordan_rose@apple.com>
Date: Wed Oct 10 21:31:21 2012 +0000
[analyzer] Treat fields of unions as having symbolic offsets.
This allows only one field to be active at a time in RegionStore.
This isn't quite the correct behavior for unions, but it at least
would handle the case of "value goes in, value comes out" from the
same field.
RegionStore currently has a number of places where any access to a union
results in UnknownVal being returned. However, it is clearly missing
some cases, or the original issue wouldn't have occurred. It is probably
now safe to remove those changes, but that's a potentially destabilizing
change that should wait for more thorough testing.
Jordan Rose [Wed, 10 Oct 2012 21:31:21 +0000 (21:31 +0000)]
[analyzer] Treat fields of unions as having symbolic offsets.
This allows only one field to be active at a time in RegionStore.
This isn't quite the correct behavior for unions, but it at least
would handle the case of "value goes in, value comes out" from the
same field.
RegionStore currently has a number of places where any access to a union
results in UnknownVal being returned. However, it is clearly missing
some cases, or the original issue wouldn't have occurred. It is probably
now safe to remove those changes, but that's a potentially destabilizing
change that should wait for more thorough testing.
[Doc parsing] This patch searches overridden objc/c++
methods looking for documentation on a particular base
class inherited by any method that overrides the base class.
In case of redeclaration, as when objc method is defined
in the implementation, it also looks up for documentation
in class/class extension being redeclared.
Jordan Rose [Wed, 10 Oct 2012 17:55:40 +0000 (17:55 +0000)]
[analyzer] Don't run non-path-sensitive checks on system headers...
...but do run them on user headers.
Previously, we were inconsistent here: non-path-sensitive checks on code
/bodies/ were only run in the main source file, but checks on
/declarations/ were run in /all/ headers. Neither of those is the
behavior we want.
Jordan Rose [Wed, 10 Oct 2012 16:42:54 +0000 (16:42 +0000)]
Move Sema::PropertyIfSetterOrGetter to ObjCMethodDecl::findPropertyDecl.
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.
Jordan Rose [Wed, 10 Oct 2012 16:42:38 +0000 (16:42 +0000)]
Change Sema::PropertyIfSetterOrGetter to make use of isPropertyAccessor.
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.
Jordan Rose [Wed, 10 Oct 2012 16:42:25 +0000 (16:42 +0000)]
Rename ObjCMethodDecl::isSynthesized to isPropertyAccessor.
This more accurately reflects its use: this flag is set when a method
matches the getter or setter name for a property in the same class,
and does not actually specify whether or not the definition of the method
will be synthesized (either implicitly or explicitly with @synthesize).
This renames the setter and backing field as well, and changes the
(soon-to-be-obsolete?) XML dump format to use 'property_accessor'
instead of 'synthesized'.
Chandler Carruth [Wed, 10 Oct 2012 11:29:08 +0000 (11:29 +0000)]
Apply the same fundamental fix for PR14048 as was applied for PR11905.
The issue arises when coercing to/from types of different sizes. We need
to be certain that the allocation on either end has sufficient room for
the coerced type. When it doesn't, we need to make room, copy across,
and then proceed. PR11905 handled the case of storing function arguments
back into allocas in the function prolog, this patch handles the case of
setting up the function arguments in a call expression.
This is actually significantly simpler than the fix for PR11905. It ends
up being a trivial change to create a temporary alloca when the source
is too small and memcpy across. This should preserve the compile-time
fast-isel benefits of doing gep+load sequences and avoiding FCAs.
Reviewed by Benjamin and Evgeniy (who fixed PR11905).
Bill Wendling [Wed, 10 Oct 2012 07:36:56 +0000 (07:36 +0000)]
Remove the final bits of Attributes being declared in the Attribute
namespace. Use the attribute's enum value instead. No functionality change
intended.
When indexing a module file, for the ppIncludedFile callback give
an invalid location if the location points to the synthetic buffer
for the module input.
projects / clang / log