performance gain. Here's what we see for -Eonly on Cocoa.h (using PTH):

- wall time decreases by 21% (26% speedup overall)
- system time decreases by 35%
- user time decreases by 6%

These reductions are due to not paging source files just to get spellings for
literals. The solution in place doesn't appear to be 100% yet, as we still see
some of the pages for source files getting mapped in. Using -print-stats, we see
that SourceManager maps in 7179K less bytes of source text (reduction of 75%).
Will investigate why the remaining 25% are getting paged in.

With these changes, here's how PTH compares to non-PTH on Cocoa.h:
  -Eonly: PTH takes 64% of the time as non-PTH (54% speedup)
  -fsyntax-only: PTH takes 89% of the time as non-PTH (11% speedup)

llvm-svn: 61913

- Added stub PTHLexer::getSpelling() that will be used for fetching cached
  spellings from the PTH file.  This doesn't do anything yet.
- Added a hook in Preprocessor::getSpelling() to call PTHLexer::getSpelling()
  when using a PTHLexer.
- Updated PTHLexer to read the offsets of spelling tables in the PTH file.

llvm-svn: 61911

gen issue fix.

llvm-svn: 61901

llvm-svn: 61894

llvm-svn: 61888

llvm-svn: 61886

Fix printing of member references to avoid displaying implicitly-generated member references, e.g., for anonymous struct/unions or implicit 'this' in member functions

llvm-svn: 61885

of category implementation is undeclared. Issue error instead.

llvm-svn: 61882

method on 'super' receiver in a category implementation.
Other simpler cases were working by accident.

llvm-svn: 61880

Duplicate-member checking within classes is still a little messy, and
anonymous unions are still completely broken in C. We'll need to unify
the handling of fields in C and C++ to make this code applicable in
both languages.

llvm-svn: 61878

Add ObjCContainerDecl class and have ObjCInterfaceDecl/ObjCCategoryDecl/ObjCProtocolDecl inherit from it.

llvm-svn: 61866

Use DeclContext::getLookupContext wherever necessary to ensure that we look through transparent contexts

llvm-svn: 61861

out its lookup context (to see through linkage
specifications). Addresses <rdar://problem/6477142>.

llvm-svn: 61848

structures and classes) in C++. Covers name lookup and the synthesis
and member access for the unnamed objects/fields associated with
anonymous unions.

Some C++ semantic checks are still missing (anonymous unions can't
have function members, static data members, etc.), and there is no
support for anonymous structs or unions in C.

llvm-svn: 61840

recent discussions with Thomas Clement and Ken Ferry concerning the "fundamental
rule" for Cocoa memory management
(http://developer.apple.com/documentation/Cocoa/Conceptual/MemoryMgmt/Tasks/MemoryManagementRules.html).

Here is the revised behavior of the checker concerning tracking retain/release
counts for objects returned from message expressions involving instance methods:

1) Track the returned object if the return type of the message expression is
id<..>, id, or a pointer to *any* object that subclasses NSObject. Such objects
are assumed to have a retain count. Previously the checker only tracked objects
when the receiver of the message expression was part of the standard Cocoa API
(i.e., had class names prefixed with 'NS'). This should significantly expand the
amount of checking performed.

2) Consider the object owned if the selector of the message expression contains
"alloc", "new", or "copy". Previously we also considered "create", but this
doesn't follow from the fundamental rule (discussions with the Cocoa folks
confirms this).

llvm-svn: 61837

nested in the translation unit. This fixes <rdar://problem/6476070>.

llvm-svn: 61832

- Big Idea:
   Source files are now mmaped when ContentCache::getBuffer() is first called.
   While this doesn't change the functionality when lexing regular source files,
   it can result in source files not being paged in when using PTH.

- Performance change:
  - No observable difference (-fsyntax-only/-Eonly) on Cocoa.h when doing
    regular source lexing.
  - No observable time difference (-fsyntax-only/-Eonly) on Cocoa.h when using
    PTH. We do observe, however, a reduction of 279K in memory mapped source
    code (3% reduction). The majority of pages from Cocoa.h (and friends) are
    still being pulled in, however, because any literal will cause
    Preprocessor::getSpelling() to be called (causing the source for the file to
    get pulled in). The next possible optimization is to cache literal strings
    in the PTH file to avoid the need for the original header sources entirely.

- Right now there is a preprocessor directive to toggle between "lazy" and
  "eager" creation of MemBuffers. This is not permanent, and is there in the
  short term to just test additional optimizations.

llvm-svn: 61827

llvm-svn: 61821

Add whitespace to silence the following warning in a Release build: warning: suggest a space before ';' or explicit braces around empty body in 'while' statement

llvm-svn: 61820

Return UnknownVal in RegionStoreManager::getSizeInElements() for unsupported regions.  This silences a warning when compiling Release-Asserts builds.

llvm-svn: 61818

to track down, easy to fix. This is on going.

llvm-svn: 61817

Fix <rdar://problem/5956221> clang ObjC rewriter: Microsoft-specific __fastcall keyword unrecognized.

This fix is C++ specific.

llvm-svn: 61816

- Simplify ParseDeclCXX to use early exit on error instead of nesting.
- Change ParseDeclCXX to using the 'skip on error' form of ExpectAndConsume.
- If we don't see the ; in a using directive, still call the action, for 
  hopefully better error recovery.

llvm-svn: 61801

llvm-svn: 61800

llvm-svn: 61799

llvm-svn: 61798

MaybeParseTypeSpecifier -> ParseOptionalTypeSpecifier.

llvm-svn: 61796

llvm-svn: 61795

information for declarations that were referenced via a qualified-id,
e.g., N::C::value. We keep track of the location of the start of the
nested-name-specifier. Note that the difference between
QualifiedDeclRefExpr and DeclRefExpr does have an effect on the
semantics of function calls in two ways:
  1) The use of a qualified-id instead of an unqualified-id suppresses
     argument-dependent lookup
  2) If the name refers to a virtual function, the qualified-id
  version will call the function determined statically while the
  unqualified-id version will call the function determined dynamically
  (by looking up the appropriate function in the vtable).

Neither of these features is implemented yet, but we do print out
qualified names for QualifiedDeclRefExprs as part of the AST printing.

llvm-svn: 61789

shorter and  more accurate.  The type name might not be qualified.

llvm-svn: 61788

- 'Buffer' is now private and must be accessed via 'getBuffer()'.
   This paves the way for lazily mapping in source files on demand.
- Added 'getSize()' (which gets the size of the content without
   necessarily accessing the MemBuffer) and 'getSizeBytesMapped()'.
- Modifed SourceManager to use these new methods.  This reduces the
  number of places that actually access the MemBuffer object for a file
  to those that actually look at the character data.

These changes result in no performance change for -fsyntax-only on Cocoa.h.

llvm-svn: 61782

avoid the version of Preprocessor::getSpelling that returns an 
std::string.

llvm-svn: 61769

Improve ext vector test case.

llvm-svn: 61766

llvm-svn: 61764

llvm-svn: 61763

 - I'm not sure this is appropriate, but it seems reasonable to be
   able to call getFloatingRank on anything which isFloatingType().

llvm-svn: 61758

llvm-svn: 61747

Make C++ classes track the POD property (C++ [class]p4)
Track the existence of a copy assignment operator.
Implicitly declare the copy assignment operator if none is provided.
Implement most of the parsing job for the G++ type traits extension.
Fully implement the low-hanging fruit of the type traits:
__is_pod: Whether a type is a POD.
__is_class: Whether a type is a (non-union) class.
__is_union: Whether a type is a union.
__is_enum: Whether a type is an enum.
__is_polymorphic: Whether a type is polymorphic (C++ [class.virtual]p1).

llvm-svn: 61746

DeclContexts whose members are visible from enclosing DeclContexts up
to (and including) the innermost enclosing non-transparent
DeclContexts. Transparent DeclContexts unify the mechanism to be used
for various language features, including C enumerations, anonymous
unions, C++0x inline namespaces, and C++ linkage
specifications. Please refer to the documentation in the Clang
internals manual for more information.

Only enumerations and linkage specifications currently use transparent
DeclContexts.

Still to do: use transparent DeclContexts to implement anonymous
unions and GCC's anonymous structs extension, and, later, the C++0x
features. We also need to tighten up the DeclContext/ScopedDecl link
to ensure that every ScopedDecl is in a single DeclContext, which
will ensure that we can then enforce ownership and reduce the memory
footprint of DeclContext.

llvm-svn: 61735

their length.

llvm-svn: 61734