Fairly large "cleaup" related to changing ObjCCompatibleAliasDecl superclass (to inherit from NamedDecl, instead of ScopedDecl). 

- Added a DenseMap to associate an IdentifierInfo with the ObjCCompatibleAliasDecl.
- Renamed LookupScopedDecl->LookupDecl and changed it's return type to Decl. Also added lookup for ObjCCompatibleAliasDecl's.
- Removed Sema::LookupInterfaceDecl(). Converted clients to used LookupDecl().
- Some minor indentation changes.

Will deal with ObjCInterfaceDecl and getObjCInterfaceDecl() in a separate commit...

llvm-svn: 49058

llvm-svn: 49057

Iterators folloring a SmallVector erased element are invalidated so
don't access cached iterators from after the erased element.

llvm-svn: 49056

llvm-svn: 49055

llvm-svn: 49054

llvm-svn: 49053

llvm-svn: 49052

llvm-svn: 49051

llvm-svn: 49050

interpose calls to gcc with calls to the analyzer.

llvm-svn: 49049

llvm-svn: 49048

llvm-svn: 49046

llvm-svn: 49045

llvm-svn: 49044

llvm-svn: 49043

llvm-svn: 49042

start of a filename, not a filename+length.  All clients can produce a
null terminated name, and the system api's require null terminated 
strings anyway.

llvm-svn: 49041

llvm-svn: 49040

llvm-svn: 49037

llvm-svn: 49036

llvm-svn: 49035

provides fast MappedFile::getFile for large files.

llvm-svn: 49034

llvm-svn: 49033

The new MemoryBuffer doesn't "leak" file descriptors and handles the
small file case efficiently.

llvm-svn: 49032

1) stop using MappedFile.
2) if profitable use the sys::path::MapInFilePages api to
   read the file.
3) otherwise fallback to read.

When sys::path::MapInFilePages is implemented, this provides
several benefits:

#1: this avoids fragmenting memory for small files.
#2: this avoids extraneous stat calls when the file size is known.
#3: this only keeps the file descriptor open while reading the 
    file, not for the duration of the lifetime of the memory 
    buffer.  This fixes a serious clang FD 'leak' problem.

I believe that this will work on a win32 machine, but I don't have
one to test on.  I'd appreciate it if someone could check.

llvm-svn: 49031

llvm-svn: 49030

MemoryBuffer is higher level and more closely matches the model
needed.

llvm-svn: 49029

llvm-svn: 49028

llvm-svn: 49027

llvm-svn: 49026

make getBase() return a const-correct pointer.

llvm-svn: 49025

not an mmapped file.  This more closely matches its requirements and
provides an implicitly null terminated buffer, something this
routine had to emulate itself before.

llvm-svn: 49024

llvm-svn: 49023

and shared.  This complicates the design, is not used, and probably
doesn't even work.

llvm-svn: 49022

llvm-svn: 49021

llvm-svn: 49020

llvm-svn: 49016

llvm-svn: 49014

llvm-svn: 49013

llvm-svn: 49012