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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
2011-12-15Keep track of all declarations of an Objective-C class (both forwardDouglas Gregor
declarations and definitions) as ObjCInterfaceDecls within the same redeclaration chain. This new representation matches what we do for C/C++ variables/functions/classes/templates/etc., and makes it possible to answer the query "where are all of the declarations of this class?" git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@146679 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-15Extend ObjCInterfaceDecl::DefinitionData to contain a pointer to theDouglas Gregor
definition, and implement ObjCInterfaceDecl::getDefinition() efficiently based on that. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@146669 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-15Introduce the core infrastructure needed to model a completeDouglas Gregor
redeclaration chain for Objective-C classes, 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 the definition knows that it is the definition. - Serialization support for when a definition gets added to a declaration that comes from an AST file. However, note that we're not taking advantage of much of this code yet, because we're still re-using ObjCInterfaceDecls. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@146667 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-15Move the definition-specific data of ObjCInterfaceDecl into aDouglas Gregor
separately-allocated DefinitionData structure, which we manage the same way as CXXRecordDecl::DefinitionData. This prepares the way for making ObjCInterfaceDecls redeclarable, to more accurately model forward declarations of Objective-C classes and eliminate the mutation of ObjCInterfaceDecl that causes us serious trouble in the AST reader. Note that ObjCInterfaceDecl's accessors are fairly robust against being applied to forward declarations, because Clang (and Sema in particular) doesn't perform RequireCompleteType/hasDefinition() checks everywhere it has to. Each of these overly-robust cases is marked with a FIXME, which we can tackle over time. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@146644 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-14Eliminate the vistigial ObjCClassDecl::ObjCClassRef, and inline itsDouglas Gregor
members into ObjCClassDecl, saving ourselves one pointer per forward declaration. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@146564 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-12Tweak submodule ID handling in the AST writerDouglas Gregor
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@146445 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-09Use llvm::sys::fs::equivalent rather than comparing inodes, becauseDouglas Gregor
comparing inodes doesn't actually work on Windows. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@146260 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-09Move ChainedIncludesSource into the Frontend library. This never reallyChandler Carruth
belonged in the Serialization library, it's setting up a compilation, not just deserializing. This should fix PR11512, making Serialization actually be layered below Frontend, a long standing layering violation in Clang. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@146233 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-09Clean up the comments for this file now that its contents are totallyChandler Carruth
different from what the comments indicated. Also drop a no longer used include that also violates the layering between Serialization and Frontend. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@146230 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-09Move a free function from the Frontend library into the Lex library asChandler Carruth
part of HeaderSearch. This function just normalizes filenames for use inside of a synthetic include directive, but it is used in both the Frontend and Serialization libraries so it needs a common home. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@146227 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-09Save category name loc in ObjCCategoryImplDecl, patch by Jason Haslam!Argyrios Kyrtzidis
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@146213 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-09Separate the serialization library's diagnostics from the frontend'sChandler Carruth
diagnostics. Conflating them was highly confusing and makes it harder to establish a firm layering separation between these two libraries. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@146207 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-08Implement umbrella directories for modules, which are similar toDouglas Gregor
umbrella headers in the sense that all of the headers within that directory (and eventually its subdirectories) are considered to be part of the module with that umbrella directory. However, unlike umbrella headers, which are expected to include all of the headers within their subdirectories, Clang will automatically include all of the headers it finds in the named subdirectory. The intent here is to allow a module map to trivially turn a subdirectory into a module, where the module's structure can mimic the directory structure. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@146165 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-08Within the module representation, generalize the notion of an umbrellaDouglas Gregor
header to also support umbrella directories. The umbrella directory for an umbrella header is the directory in which the umbrella header resides. No functionality change yet, but it's coming. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@146158 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-07Remove unused-but-set variable.Benjamin Kramer
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@146034 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-06Implement inferred submodules support, which (when requested)Douglas Gregor
implicitly generates submodules corresponding to the headers that fall within a module. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@145887 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-05Parse inferred submodules in module maps, track their contents inDouglas Gregor
Module, and (de-)serialize this information. Semantics of inferred submodules to follow. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@145864 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-05Implement support for wildcard exports in modules, allowing a moduleDouglas Gregor
to re-export anything that it imports. This opt-in feature makes a module behave more like a header, because it can be used to re-export the transitive closure of a (sub)module's dependencies. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@145811 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-05Actually add a useful bit to the comment pre-FIXMEDouglas Gregor
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@145809 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-05When writing a module file, keep track of the set of (sub)modules thatDouglas Gregor
it imports, establishing dependencies at the (sub)module granularity. This is not a user-visible change (yet). git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@145808 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-03[PCH] Make sure that the SourceExpr of a OpaqueValueExpr is always initializedArgyrios Kyrtzidis
when deserialized, fixing random crashes in libclang. Also simplifies how OpaqueValueExprs are [de]serialized. The reader/writer automatically retains pointer equality of sub-statements (when a statement node is referenced in multiple nodes), so no need to manually handle it. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@145752 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-03Module files representing actual modules don't need to know the set of ↵Douglas Gregor
modules they import, since that information isn't actually used. Drop it from the AST file git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@145738 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-03Implement support for precompiled headers, preambles, and serializedDouglas Gregor
"main" files that import modules. When loading any of these kinds of AST files, we make the modules that were imported visible into the translation unit that loaded the PCH file or preamble. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@145737 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-02Introduce a module import declaration, so that we properly represent, e.g.,Douglas Gregor
__import_module__ std.vector; in the AST. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@145725 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-02Only perform checking of the predefines buffer when loading aDouglas Gregor
precompiled header. Previously, we were trying to gather predefines buffers from all kinds of AST files (which doesn't make sense) and were performing some validation when AST files were loaded as main files. With these tweaks, using PCH files that import modules no longer fails immediately (due to mismatched predefines buffers). However, module visibility is lost, so this feature does not yet work. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@145709 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-02When making a module visible, also make any of its exported modulesDouglas Gregor
visible, allowing one to create modules that import (and then re-export) other modules. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@145696 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-02Implement (de-)serialization of the set of exported modules in aDouglas Gregor
module map. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@145695 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-02Notify the AST writer (via ASTDeserializationListener) when aDouglas Gregor
(sub)module is read from an AST file. This makes sure that the AST writer knows how to map all modules to their global IDs. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@145685 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-02Implement name hiding for macro definitions within modules, such thatDouglas Gregor
only the macro definitions from visible (sub)modules will actually be visible. This provides the same behavior for macros that r145640 provided for declarations. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@145683 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-01Implement name hiding for declarations deserialized from a non-visibleDouglas Gregor
module. When that module becomes visible, so do those declarations. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@145640 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-01Introduce the notion of name visibility into modules. For a givenDouglas Gregor
(sub)module, all of the names may be hidden, just the macro names may be exposed (for example, after the preprocessor has seen the import of the module but the parser has not), or all of the names may be exposed. Importing a module makes its names, and the names in any of its non-explicit submodules, visible to name lookup (transitively). This commit only introduces the notion of name visible and marks modules and submodules as visible when they are imported. The actual name-hiding logic in the AST reader will follow (along with test cases). git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@145586 91177308-0d34-0410-b5e6-96231b3b80d8
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