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* Don't crash when we fail to load a module. It's unbecoming of aDouglas Gregor2011-09-101-77/+79
| | | | | | well-bred compiler like Clang. llvm-svn: 139442
* In the ASTReader, replace the never-NULL Preprocessor pointer with aDouglas Gregor2011-09-091-85/+59
| | | | | | | Preprocessor reference. Simplify some code along the way, so there is no separate "initialize the preprocessor" step. llvm-svn: 139418
* In ASTReader, replace the never-NULL ASTContext pointer with anDouglas Gregor2011-09-091-194/+160
| | | | | | | | ASTContext reference. Remove all of the extra checking and logic that was used to cope with a NULL ASTContext. No effective functionality change. llvm-svn: 139413
* Mark the translation unit as having lexical/visible storage only when we ↵Douglas Gregor2011-09-091-4/+5
| | | | | | actually have data for that lexical or visible storage llvm-svn: 139409
* Back out r139358 "[PCH] When loading the decls linked to anDouglas Gregor2011-09-091-8/+0
| | | | | | | | identifier, also make them visible in the translation unit," which isn't needed now that John's eliminated the AST dependency in blocks CodeGen. llvm-svn: 139408
* [PCH] When loading the decls linked to an identifier, also make them visibleArgyrios Kyrtzidis2011-09-091-0/+8
| | | | | | in the translation unit. llvm-svn: 139358
* [libclang] Fix annotation and getting a "macro expansion" cursorArgyrios Kyrtzidis2011-09-081-4/+9
| | | | | | for a builtin macro expansion. llvm-svn: 139298
* Implement the Objective-C 'instancetype' type, which is an alias ofDouglas Gregor2011-09-081-0/+4
| | | | | | | | | | 'id' that can be used (only!) via a contextual keyword as the result type of an Objective-C message send. 'instancetype' then gives the method a related result type, which we have already been inferring for a variety of methods (new, alloc, init, self, retain). Addresses <rdar://problem/9267640>. llvm-svn: 139275
* Always construct an ASTReader with a non-NULL ASTContext andDouglas Gregor2011-09-021-22/+2
| | | | | | | | | Preprocessor, eliminating the constructor that was used by ASTUnit (which didn't provide an ASTContext or Prepreprocessor). Ensuring that both objects are non-NULL will simplify module loading (but none of that is done yet). llvm-svn: 138986
* Modules hide macro definitions by default, so that silly things likeDouglas Gregor2011-09-011-5/+6
| | | | | | | | | | | include guards don't show up as macro definitions in every translation unit that imports a module. Macro definitions can, however, be exported with the intentionally-ugly #__export_macro__ directive. Implement this feature by not even bothering to serialize non-exported macros to a module, because clients of that module need not (should not) know that these macros even exist. llvm-svn: 138943
* Support importing of ObjC categories from modules.Argyrios Kyrtzidis2011-09-011-0/+21
| | | | | | | | | | | | The initial incentive was to fix a crash when PCH chaining categories to an interface, but the fix was done in the "modules way" that I hear is popular with the kids these days. Each module stores the local chain of categories and we combine them when the interface is loaded. We also warn if non-dependent modules introduce duplicate named categories. llvm-svn: 138926
* Remove obsolete ObjCInferRelatedReturnType from LangOptions...the correct ↵Jordy Rose2011-08-301-2/+0
| | | | | | option is ObjCInferRelatedResultType. llvm-svn: 138793
* Remove unused variables noticed by GCC.Benjamin Kramer2011-08-271-5/+0
| | | | llvm-svn: 138707
* Teach the ASTReader how to avoid cycles when loading declarations thatDouglas Gregor2011-08-261-5/+7
| | | | | | are lexically within a particular DeclContext. Test forthcoming. llvm-svn: 138668
* Clean up the reloading of identifier information following the load ofDouglas Gregor2011-08-251-58/+41
| | | | | | | a top-level module. This code is still horrible and should go away, but we're not there yet. llvm-svn: 138586
* Preload source location entries as soon as we've loaded a particularDouglas Gregor2011-08-251-11/+15
| | | | | | | AST file, rather than waiting until we finish loading the top-level AST file. llvm-svn: 138585
* Move file validation in the ASTReader from "top of chain" validationDouglas Gregor2011-08-251-65/+63
| | | | | | | to "when loading a particular module" validation, since it was only validating local information anyway. This shouldn't change anything. llvm-svn: 138583
* Factor the Module and ModuleManager classes out into separate headersDouglas Gregor2011-08-251-762/+322
| | | | | | | and .cpp files, since ASTReader.cpp was getting way too large. No functionality change. llvm-svn: 138582
* Switch ASTReader::GetHeaderFileInfo() from a walk over the moduleDouglas Gregor2011-08-251-20/+43
| | | | | | chain to a proper search. llvm-svn: 138574
* Switch the forward walk through the module chain over to a depth-firstDouglas Gregor2011-08-251-9/+30
| | | | | | search in ASTReader::ReadPreprocessedEntities(). llvm-svn: 138572
* Use the module manager's search facility to look for methods with aDouglas Gregor2011-08-251-47/+88
| | | | | | | | | given selector, rather than walking the chain backwards. Teach its visitor how to merge multiple result sets into a single result set, combining the results of selector lookup in several different modules into a single result set. llvm-svn: 138556
* Don't force the complete deserialization of the visible-declarationsDouglas Gregor2011-08-241-40/+0
| | | | | | | | | | table when serializing an AST file. This was a holdover from the days before chained PCH, and is a complete waste of time and storage now. It's a good thing it's useless, because I have no idea how I would have implemented MaterializeVisibleDecls efficiently in the presence of modules. llvm-svn: 138496
* Introduce a depth-first search of modules into the module manager,Douglas Gregor2011-08-241-24/+97
| | | | | | | | | | | | which supports both pre-order and post-order traversal via a visitor mechanism. Use this depth-first search with a post-order traversal to give predictable ordering semantics when walking all of the lexical declarations in the translation unit. Eventually, module imports will occur in the source code rather than at the beginning, and we'll have to revisit this walk. llvm-svn: 138490
* In the AST reader, switch name lookup within a DeclContect over to theDouglas Gregor2011-08-241-102/+119
| | | | | | | | | | | | | | | | | | module DAG-based lookup scheme. This required some reshuffling, so that each module stores its own mapping from DeclContexts to their lexical and visible sets for those DeclContexts (rather than one big "chain"). Overall, this allows simple qualified name lookup into the translation unit to gather results from multiple modules, with the lookup results in module B shadowing the lookup results in module A when B imports A. Walking all of the lexical declarations in a module DAG is still a mess; we'll end up walking the loaded module list backwards, which works fine for chained PCH but doesn't make sense in a DAG. I'll tackle this issue as a separate commit. llvm-svn: 138463
* Boost the efficiency of SourceManager::getMacroArgExpandedLocation.Argyrios Kyrtzidis2011-08-211-2/+4
| | | | | | | | | | | | | | | | | | Currently getMacroArgExpandedLocation is very inefficient and for the case of a location pointing at the main file it will end up checking almost all of the SLocEntries. Make it faster: -Use a map of macro argument chunks to their expanded source location. The map is for a single source file, it's stored in the file's ContentCache and lazily computed, like the source lines cache. -In SLocEntry's FileInfo add an 'unsigned NumCreatedFIDs' field that keeps track of the number of FileIDs (files and macros) that were created during preprocessing of that particular file SLocEntry. This is useful when computing the macro argument map in skipping included files while scanning for macro arg FileIDs that lexed from a specific source file. Due to padding, the new field does not increase the size of SLocEntry. llvm-svn: 138225
* Make the loading of multiple records for the same identifier (fromDouglas Gregor2011-08-201-1/+3
| | | | | | | | | | different modules) more robust. It already handled (simple) merges of the set of declarations attached to that identifier, so add a test case that shows us getting two different declarations for the same identifier (one struct, one function) from different modules, and are able to use both of them. llvm-svn: 138189
* Clean out some minor cruft in the AST reader; no functionality change.Douglas Gregor2011-08-201-2/+0
| | | | llvm-svn: 138188
* Introduce a module visitation function that starts at the top-levelDouglas Gregor2011-08-201-19/+116
| | | | | | | | | | | | | | | | | modules (those that no other module depends on) and performs a search over all of the modules, visiting a new module only when all of the modules that depend on it have already been visited. The visitor can abort the search for all modules that a module depends on, which allows us to minimize the number of lookups necessary when performing a search. Switch identifier lookup from a linear walk over the set of modules to this module visitation operation. The behavior is the same for simple PCH and chained PCH, but provides the proper search order for modules. Verified with printf debugging, since we don't have enough in place to actually test this. llvm-svn: 138187
* Remove unused function ModuleManager::exportLookup()Douglas Gregor2011-08-191-10/+0
| | | | llvm-svn: 138079
* Teach ModuleManager::addModule() to check whether a particular moduleDouglas Gregor2011-08-191-38/+66
| | | | | | | | | | | | | | | | | | has already been loaded before allocating a new Module structure. If the module has already been loaded (uniquing based on file name), then just return the existing module rather than trying to load it again. This allows us to load a DAG of modules. Introduce a simple test case that forms a diamond-shaped module graph, and illustrates that a source file importing the bottom of the diamond can see declarations in all four of the modules that make up the diamond. Note that this version moves the file-opening logic into the module manager, rather than splitting it between the module manager and the AST reader. More importantly, it properly handles the weird-but-possibly-useful case of loading an AST file from "-". llvm-svn: 138030
* Temporarily revert r137925 to appease buildbots. Original commit message:Chad Rosier2011-08-181-39/+14
| | | | | | | | | | | | | | Teach ModuleManager::addModule() to check whether a particular module has already been loaded before allocating a new Module structure. If the module has already been loaded (uniquing based on file name), then just return the existing module rather than trying to load it again. This allows us to load a DAG of modules. Introduce a simple test case that forms a diamond-shaped module graph, and illustrates that a source file importing the bottom of the diamond can see declarations in all four of the modules that make up the diamond. llvm-svn: 137971
* Teach ModuleManager::addModule() to check whether a particular moduleDouglas Gregor2011-08-181-14/+39
| | | | | | | | | | | | | has already been loaded before allocating a new Module structure. If the module has already been loaded (uniquing based on file name), then just return the existing module rather than trying to load it again. This allows us to load a DAG of modules. Introduce a simple test case that forms a diamond-shaped module graph, and illustrates that a source file importing the bottom of the diamond can see declarations in all four of the modules that make up the diamond. llvm-svn: 137925
* Keep track of which modules have been loaded directly (e.g., viaDouglas Gregor2011-08-181-12/+16
| | | | | | | | | | | | | -import-module) vs. loaded because some other module depends on them. As part of doing this, pass down the module that caused a module to be loaded directly, rather than assuming that we're loading a chain. Finally, write out all of the directly-loaded modules when serializing an AST file (using the new IMPORTS record), so that an AST file can depend on more than one other AST file, all of which will be loaded when that AST file is loaded. This allows us to form and load a tree of modules, but we can't yet load a DAG of modules. llvm-svn: 137923
* In the AST file format, eliminate the CHAINED_METADATA record. Instead,Douglas Gregor2011-08-171-18/+18
| | | | | | | | | | | | | all AST files have a normal METADATA record that has the same form regardless of whether we refer to a chained PCH or any other kind of AST file. Introduce the IMPORTS record, which describes all of the AST files that are imported by this AST file, and how (as a module, a PCH file, etc.). Currently, we emit at most one entry to this record, to support chained PCH. llvm-svn: 137869
* Switch the __int128_t and __uint128_t types over to predefined typesDouglas Gregor2011-08-121-3/+8
| | | | | | | in the AST format, which are built lazily by the ASTContext when requested. llvm-svn: 137437
* Switch the Objective-C 'SEL' type over to a predefined type in theDouglas Gregor2011-08-121-5/+4
| | | | | | | AST file format, lazily generating the actual declaration in ASTContext as needed. llvm-svn: 137434
* Switch the Objective-C 'Class' type over to a predefined type in theDouglas Gregor2011-08-121-5/+4
| | | | | | | AST file format, lazily generating the actual declaration in ASTContext as needed. llvm-svn: 137431
* Move the creation of the predefined typedef for Objective-C's 'id'Douglas Gregor2011-08-121-5/+4
| | | | | | | | | type over into the AST context, then make that declaration a predefined declaration in the AST format. This ensures that different AST files will at least agree on the (global) declaration ID for 'id', and eliminates one of the "special" types in the AST file format. llvm-svn: 137429
* In the serialized AST format, make the translation unit a "predefined"Douglas Gregor2011-08-121-29/+37
| | | | | | | | | | declaration that never actually gets serialized. Instead, serialize the various kinds of update records (lexical decls, visible decls, the addition of an anonymous namespace) for the translation unit, even if we're not chaining. This way, we won't have to deal with multiple loaded translation unit declarations. llvm-svn: 137395
* Fix a PCH crash bug where we kept a reference inside a DenseMap while the ↵Argyrios Kyrtzidis2011-08-111-1/+4
| | | | | | | | map was getting modified. No test case, sorry. It's one of those bugs where it's really really hard to make one. rdar://9910862. llvm-svn: 137383
* When initializing a context from a particular AST file, check whetherDouglas Gregor2011-08-111-34/+71
| | | | | | | | either "special" type has already been initialized. Previously, we did this check based on just the first special type (__builtin_va_list), but now we have some NULL special type entries to content with. llvm-svn: 137373
* The AST reader and writer don't need accessors for poking at the predefined ↵Douglas Gregor2011-08-111-4/+4
| | | | | | Objective-C types llvm-svn: 137366
* Move the creation of the record type for the state of Objective-C fastDouglas Gregor2011-08-091-3/+0
| | | | | | | | enumerations from the ASTContext into CodeGen, so that we don't need to serialize it to AST files. This appears to be the last of the low-hanging fruit for SpecialTypes. llvm-svn: 137124
* Don't serialize the block descriptor or block extended descriptorDouglas Gregor2011-08-091-5/+0
| | | | | | | types to AST files; they're only used by debug info generation anyway, and shouldn't ever exist in the AST anyway. llvm-svn: 137122
* Move the construction of the RecordDecl representing the runtimeDouglas Gregor2011-08-091-2/+0
| | | | | | | | layout of a constant NSString from the ASTContext over to CodeGen, since this is solely CodeGen's responsibility. Eliminates one of the unnecessary "special" types that we serialize. llvm-svn: 137121
* Migrate the serialization of ASTContext's AutoDeduceTy andDouglas Gregor2011-08-091-5/+5
| | | | | | | AutoRRefDeductTy from the "special types" block to predefined types. The latter behaves better when loading multiple AST files. llvm-svn: 137120
* Add workaround for built va list (and other builtins) so that running ↵Jonathan D. Turner2011-08-051-81/+84
| | | | | | ReadAST multiple times does not immediately throw an error. llvm-svn: 136995
* Clean up the debug dump for a Module, so the local->global maps areDouglas Gregor2011-08-041-8/+19
| | | | | | | clearly called out, and add the missing local -> global selector map output. llvm-svn: 136903
* Introduce local -> global mapping for preprocessed entity IDs. This isDouglas Gregor2011-08-041-13/+35
| | | | | | | | | the last of the ID/offset/index mappings that I know of. Unfortunately, the "gap" method of testing doesn't work here due to the way the preprocessing record performs iteration. We'll do more testing once multi-AST loading is possible. llvm-svn: 136902
* Remove the unset, unused return value ofDouglas Gregor2011-08-041-6/+6
| | | | | | ASTReader::ReadMacroRecord(). No functionality change. llvm-svn: 136893
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