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2012-01-06Introduce a "Hidden" bit into Decl, to track whether that declarationDouglas Gregor
is hidden from name lookup. The previous hack of tweaking the ModulePrivate bit when loading a declaration from a hidden submodule was brittle. Note that we now have 34 bits in Decl. I'll fix that next. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147658 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-06Teach DeclContext deserialization to pay attention to endianness, fromDouglas Gregor
David Fang and Takumi Nakamura. Fixes many PCH failures on PowerPC. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147657 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-05Don't seed the ASTWriter's declaration -> ID mapping with the IDs ofDouglas Gregor
each deserialized declaration, since that information is already available in each declaration. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147619 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-05When we deserialize a declaration from a module file, allocate extraDouglas Gregor
storage for the global declaration ID. Declarations that are parsed (rather than deserialized) are unaffected, so the number of declarations that pay this cost tends to be relatively small (since relatively few declarations are ever deserialized). This replaces a largish DenseMap within the AST reader. It's not strictly a win in terms of memory use---not every declaration was added to that DenseMap in the first place---but it's cleaner to have this information available for every deserialized declaration, so that future clients can rely on it. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147617 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-05When creating declarations that are deserialized from an module file,Douglas Gregor
go through a central allocation routine Decl::AllocateDeserializedDecl(). No actual functionality change (yet). git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147614 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-05When loading an AST file, set SourceManager::MainFileID to the main file of ↵Argyrios Kyrtzidis
the AST file, as suggested by Tom Honermann. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147612 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-04Store the submodules of a module in source order, as they are storedDouglas Gregor
in the module map. This provides a bit more predictability for the user, as well as eliminating the need to sort the submodules when serializing them. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147564 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-04Implement declaration merging for variables in disjoint modules.Douglas Gregor
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147535 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-04Implement declaration merging for non-template functions fromDouglas Gregor
different modules. This implementation is a first approximation of what we want, using only the function type to determine equivalence. Later, we'll want to deal with some of the more subtle issues, including: - C allows a prototyped declaration and a non-prototyped declaration to be merged, which we should support - We may want to ignore the return type when merging, then complain if the return types differ. Or, we may want to leave it as it us, so that we only complain if overload resolution eventually fails. - C++ non-static member functions need to consider cv-qualifiers and ref-qualifiers. - Function templates need to consider the template parameters and return type. - Function template specializations will have special rules. - We can now (accidentally!) end up overloading in C, even without the "overloadable" attribute, and will need to detect this at some point. The actual detection of "is this an overload?" is implemented by Sema::IsOverload(), which will need to be moved into the AST library for re-use here. That will be a future refactor. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147534 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-04Implement declaration merging for typedefs loaded from disjointDouglas Gregor
modules, so long as the typedefs refer to the same underlying type. This ensures that the typedefs end up in the same redeclaration chain. To test this, fix name lookup for C/Objective-C to properly deal with multiple declarations with the same name in the same scope. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147533 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-03Implement cross-module declaration merging for tag declarations, soDouglas Gregor
that if two modules A and B both contain a declaration of a tag such as struct X; and those two modules are unrelated, the two declarations of X will be merged into a single redeclaration chain. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147488 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-03Don't attempt to merge a deserialized declaration with existingDouglas Gregor
declarations in the AST unless modules are enabled. This case doesn't come up with precompiled headers, and it isn't cheap. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147451 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-03Factor the merging of declarations in the AST reader out to a separateDouglas Gregor
member function template, since the behavior is identical for ObjCInterfaceDecl and ObjCProtocolDecl. It's expected that all redeclarable entities will have the same behavior. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147450 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-02Eliminate ObjCProtocolDecl's end-of-definition location. It is notDouglas Gregor
used anywhere. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147422 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-02Move ObjCProtocolDecl::EndLoc into its DefinitionData, and giveDouglas Gregor
ObjCProtocolDecl proper source-range information. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147420 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-01Eliminate the ForwardDecl/InitiallyForwardDecl bits from ObjCProtocolDecl. ↵Douglas Gregor
They are no longer needed git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147419 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-01Implement declaration merging for Objective-C protocols acrossDouglas Gregor
multiple, disjoint modules. There is far too much duplicating with the ObjCInterfaceDecl case here, which I'll eliminate shortly. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147417 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-01Eliminate ObjCForwardProtocolDecl, which is redundant now thatDouglas Gregor
ObjCProtocolDecl modules forward declarations properly. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147415 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-01Don't bother rewriting an Objective-C class or protocol declaration to the ↵Douglas Gregor
module file when we've merely added a definition git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147414 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-01Eliminate ASTMutationListener::UpdatedAttributeList, which is noDouglas Gregor
longer needed now that we aren't back-patching ObjCProtocolDecls. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147413 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-01Wire up redeclaration chains for Objective-C protocols, so that bothDouglas Gregor
forward declarations and definitions of an Objective-C protocol are represented within a single chain of ObjCProtocolDecls. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147412 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-01Introduce the core infrastructure needed to model redeclaration chainsDouglas Gregor
for Objective-C protocols, including: - Using the first declaration as the canonical declaration - Using the definition as the primary DeclContext - Making sure that all declarations have a pointer to the definition data, and that we know which declaration is the definition - Serialization support for redeclaration chains and for adding definitions to already-serialized declarations. However, note that we're not taking advantage of much of this code yet, because we're still re-using ObjCProtocolDecls. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147410 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-01Move the data that corresponds to the definition of a protocol into aDouglas Gregor
separately-allocated DefinitionData structure. Introduce various functions that will help with the separation of declarations from definitions (isThisDeclarationADefinition(), hasDefinition(), getDefinition()). git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147408 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-31Implement support for module requirements, which indicate the languageDouglas Gregor
features needed for a particular module to be available. This allows mixed-language modules, where certain headers only work under some language variants (e.g., in C++, std.tuple might only be available in C++11 mode). git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147387 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-29Fix cmake build with -DBUILD_SHARED_LIBS=ON.Rafael Espindola
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147338 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-27Eliminate ObjCClassDecl, which is redundant now that ObjCInterfaceDeclDouglas Gregor
covers both declarations (@class) and definitions (@interface) of an Objective-C class. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147299 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-27Initialize member that ends up in PCH files.Benjamin Kramer
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147288 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-22Make a note for an optimization that I'd like to implement, when the ASTs ↵Douglas Gregor
for local externs are sound git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147185 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-22Serialize the AST reader's mapping from canonical declarations to theDouglas Gregor
set of (previously-canonical) declaration IDs to the module file, so that future AST reader instances that load the module know which declarations are merged. This is important in the fairly tricky case where a declaration of an entity, e.g., @class X; occurs before the import of a module that also declares that entity. We merge the declarations, and record the fact that the declaration of X loaded from the module was merged into the (now canonical) declaration of X that we parsed. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147181 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-22If we end up merging an Objective-C class with an existing Objective-CDouglas Gregor
class that comes from a different module file, make sure that we load all of the pending declarations for the original declaration. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147168 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-22When deserializing an Objective-C class, check whether we have anotherDouglas Gregor
declaration of that same class that either came from some other module or occurred in the translation unit loading the module. In this case, we need to merge the two redeclaration chains immediately so that all such declarations have the same canonical declaration in the resulting AST (even though they don't in the module files we've imported). Focusing on Objective-C classes until I'm happy with the design, then I'll both (1) extend this notion to other kinds of declarations, and (2) optimize away this extra checking when we're not dealing with modules. For now, doing this checking for PCH files/preambles gives us better testing coverage. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147123 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-21Implement a trivial, obvious optimization for deserialization ofDouglas Gregor
redeclaration chains: only ever have the reader search for redeclarations of the first (canonical) declaration, since we only ever record redeclaration ranges for the that declaration. Searching for redeclarations of non-canonical declarations will never find anything, so it's a complete waste of time. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147055 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-20When we make a previously-deserialized module definition visible,Douglas Gregor
notify the AST deserialization listener so that the AST writer knows that it can write the macro definition. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@146994 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-20Fix off-by-one error in an assert condition. No functionality change, but betterRichard Smith
error detection. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@146962 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-20Detect when mapping a #include/#import over to a submodule ends upDouglas Gregor
hitting a submodule that was never actually created, e.g., because that header wasn't parsed. In such cases, complain (because the module's umbrella headers don't cover everything) and fall back to including the header. Later, we'll add a warning at module-build time to catch all such cases. However, this fallback is important to eliminate assertions in the ASTWriter when this happens. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@146933 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-19Eliminate the first->last redeclaration map from the AST fileDouglas Gregor
format. It's no longer being used, now that we have a new implementation of redeclaration chains. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@146905 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-19Remove ASTReader's PendingForwardRefs, which is now handled by theDouglas Gregor
(more general) fix-up of definition data pointers. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@146903 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-19Once we have fully deserialized a redeclaration chain for somethingDouglas Gregor
with a definition pointer (e.g., C++ and Objective-C classes), zip through the redeclaration chain to make sure that all of the declarations point to the definition data. As part of this, realized again why the first redeclaration of an entity in a file is important, and brought back that idea. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@146886 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-19Re-implement (de-)serialization of redeclaration chains forDouglas Gregor
redeclaration templates (RedeclarableTemplateDecl), similarly to the way (de-)serialization is implemented for Redeclarable<T>. In the process, found a simpler formulation for handling redeclaration chains and implemented that in both places. The new test establishes that we're building the redeclaration chains properly. However, the FIXME indicates where we're tickling a different bug that has to do with us not setting the DefinitionData pointer properly in redeclarations that we detected after the definition itself was deserialized. The (separable) fix for that bug is forthcoming. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@146883 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-19The submodule offset map can introduce "empty" remapping entries forDouglas Gregor
imported modules that don't introduce any new entities of a particular kind. Allow these entries to be replaced with entries for another loaded module. In the included test case, selectors exhibit this behavior. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@146870 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-19Optimize serialized representation of redeclarable declarations forDouglas Gregor
which there are no redeclarations. This reduced by size of the PCH file for Cocoa.h by ~650k: ~536k of that was in the new LOCAL_REDECLARATIONS table, which went from a ridiculous 540k down to an acceptable 3.5k, while the rest was due to the more compact abbreviated representation of redeclarable declaration kinds (which no longer need to store the 'first' declaration ID). git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@146869 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-19Combine common (de-)serialization logic for typedefs and type aliasesDouglas Gregor
into operations on TypedefNameDecl. No functionality change. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@146866 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-19constexpr handling improvements. Produce detailed diagnostics when a 'constexpr'Richard Smith
variable is initialized by a non-constant expression, and pass in the variable being declared so that earlier-initialized fields' values can be used. Rearrange VarDecl init evaluation to make this possible, and in so doing fix a long-standing issue in our C++ constant expression handling, where we would mishandle cases like: extern const int a; const int n = a; const int a = 5; int arr[n]; Here, n is not initialized by a constant expression, so can't be used in an ICE, even though the initialization expression would be an ICE if it appeared later in the TU. This requires computing whether the initializer is an ICE eagerly, and saving that information in PCH files. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@146856 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-19Begin adding AVX2 intrinsics. Necessitated increasing the number of bits ↵Craig Topper
used to store builtinID when serializing identifier table. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@146855 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-17Completely re-implement (de-)serialization of declarationDouglas Gregor
chains. The previous implementation relied heavily on the declaration chain being stored as a (circular) linked list on disk, as it is in memory. However, when deserializing from multiple modules, the different chains could get mixed up, leading to broken declaration chains. The new solution keeps track of the first and last declarations in the chain for each module file. When we load a declaration, we search all of the module files for redeclarations of that declaration, then splice together all of the lists into a coherent whole (along with any redeclarations that were actually parsed). As a drive-by fix, (de-)serialize the redeclaration chains of TypedefNameDecls, which had somehow gotten missed previously. Add a test of this serialization. This new scheme creates a redeclaration table that is fairly large in the PCH file (on the order of 400k for Cocoa.h's 12MB PCH file). The table is mmap'd in and searched via a binary search, but it's still quite large. A future tweak will eliminate entries for declarations that have no redeclarations anywhere, and should drastically reduce the size of this table. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@146841 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-17[PCH] Don't deserialize bodies of interesting decls while iteratingArgyrios Kyrtzidis
over them because more interesting decls can be added during body deserialization. Should fix msvc build tests. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@146824 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-17[PCH] In ASTReader::FinishedDeserializing fully load the interesting decls,Argyrios Kyrtzidis
including deserializing their bodies, so that any other declarations that get referenced in the body will be fully deserialized by the time we pass them to the consumer. Could not reduce to a test case unfortunately. rdar://10587158. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@146817 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-16Make sure we're always setting the previous declaration of an ObjCInterfaceDeclDouglas Gregor
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@146763 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-16Fix chaining of ObjCInterfaceDecl redeclarationsDouglas Gregor
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@146722 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-15Move ObjCInterfaceDecl's "EndLoc" into DefinitionData, since it onlyDouglas Gregor
applies to an actual definition. Plus, clarify the purpose of this field and give the accessor a different name, since getLocEnd() is supposed to be the same as getSourceRange().getEnd(). git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@146694 91177308-0d34-0410-b5e6-96231b3b80d8
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