de-serialization of abstract syntax trees.

PCH support serializes the contents of the abstract syntax tree (AST)
to a bitstream. When the PCH file is read, declarations are serialized
as-needed. For example, a declaration of a variable "x" will be
deserialized only when its VarDecl can be found by a client, e.g.,
based on name lookup for "x" or traversing the entire contents of the
owner of "x".

This commit provides the framework for serialization and (lazy)
deserialization, along with support for variable and typedef
declarations (along with several kinds of types). More
declarations/types, along with important auxiliary structures (source
manager, preprocessor, etc.), will follow.

llvm-svn: 68732

llvm-svn: 68729

 - PR3964.

llvm-svn: 68710

of messages sent to nil.

llvm-svn: 68683

up adding them twice when running with -no-integrated-cpp or
-save-temps.
 - <rdar://problem/6766636> -save-temps falls over with prefix headers

llvm-svn: 68660

llvm-svn: 68659

llvm-svn: 68651

llvm-svn: 68640

llvm-svn: 68635

used as receiver.

llvm-svn: 68631

Enhance analyzer reasoning about sending messages to nil.  A nil receiver returns 0 for scalars of size <= sizeof(void*).

llvm-svn: 68629

 - Add -static-define option driver can use when __STATIC__ should be
   defined (instead of __DYNAMIC__).

 - Don't set __OPTIMIZE_SIZE__ on Os, __OPTIMIZE_SIZE__ is tied to Oz.

 - Set __NO_INLINE__ following GCC 4.2.

 - Set __GNU_GNU_INLINE__ or __GNU_STDC_INLINE__ following GCC 4.2.

 - Set __EXCEPTIONS for Objective-C NonFragile ABI.

 - Set __STRICT_ANSI__ for standard conforming modes.

 - I added a clang style test case in utils for this, but its not
   particularly portable and I don't think it belongs in the test
   suite.

llvm-svn: 68621

Fixes <rdar://problem/6762239> [sema] gcc incompatibility; error on incompatible operand types in ?:.

llvm-svn: 68617

Fixes <rdar://problem/6759522>

llvm-svn: 68611

 - Complete <rdar://problem/6635883> Support __objc_exception__
   attribute

llvm-svn: 68591

"The attached patch generates warnings of cases where an ObjC message is sent to
a nil object and the size of return type of that message is larger than the size
of void pointer. This may result in undefined return values as described in PR
2718.  The patch also includes test cases."

llvm-svn: 68585

 - Add -pic-level clang-cc option to specify the value for the define,
   updated driver to pass this.

 - Added __pic__

 - Added OBJC_ZEROCOST_EXCEPTIONS define while I was here (to match gcc).

llvm-svn: 68584

llvm-svn: 68583

llvm-svn: 68570

llvm-svn: 68568

llvm-svn: 68561

multiple instances of an option.

Also, removed direct -ansi support from clang-cc.

llvm-svn: 68558

we must not issue gc-specific errors in non-gc mode.

llvm-svn: 68551

clang.
 - We will eventually want some more driver infrastructre for this
   probably.

 - For now, the clang-cc interface stays relatively the same, but we
   don't accept multiple instances anymore, or the [no-] variants
   directly.

llvm-svn: 68550

llvm-svn: 68543

functions.  Fixes PR3941.

llvm-svn: 68541

the base implementations (and not in
current implementation).

llvm-svn: 68527

llvm-svn: 68526

incorrectly. I'm blanking on the smartest way to write this search,
but we should just do the right thing when we move to TableGen.
 - <rdar://problem/6761194> [driver] -Wextra-tokens isn't parsed
   correctly

llvm-svn: 68525

llvm-svn: 68521

llvm-svn: 68519

Tweak Sema::ActOnInstanceMessage() to look for a class method when dealing with qualified id's. This change is motivated by our desire to not support the "Class<foo>" idiom. Note that the change makes perfect sense (since all ObjC classes are also id/instances).

This allow us to document a simple migration path...change "Class <foo>" to "id <foo>".

This effects: 
- <rdar://problem/6761939> TASK: File source change radars for "qualified Class" errors
- <rdar://problem/6761864> Protocol qualified Class is unsupported

llvm-svn: 68517

llvm-svn: 68515

This fixes <rdar://problem/6757102> clang type for @"xxx" is "NSConstantString *" (GCC type is "NSString *").

llvm-svn: 68514

exception with this attribute we don't need to emit a weak definition
for the exception type information.

llvm-svn: 68513

llvm-svn: 68512

GCC ignores macro definitions after \n's or that real code depends
on this.

llvm-svn: 68511

 - Changed method names to match gcc (categories names still aren't
   mangled in).

 - Expose correct name for class and metadata symbols (although
   -fvisibility=hidden isn't yet correct).

 - Remove several things from llvm.used that didn't need to be there
   (I suspect this can still be trimmed).

 - Don't use asm-prefix extension for _objc_empty_{cache,vtable} (not
   needed).

 - Hide EH type class info with -fvisibility=hidden

 - Change setGlobal[Option]Visibility to not change the visibility of
   functions with internal linkage.

llvm-svn: 68510

llvm-svn: 68505

-mtriple).

llvm-svn: 68484