Speeds up parsing of global declarations in cases where the warning
is switched of by about 0.8% (tested with int i<N>).

Additionally, this puts computing the diagnostic class into the hot
path more when parsing, in preparation for upcoming optimizations
in this area.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@169976 91177308-0d34-0410-b5e6-96231b3b80d8
PR14581: Make SourceLocation::printToString work, or it will always return an empty string.

No test case, this is debugging code.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@169980 91177308-0d34-0410-b5e6-96231b3b80d8
Marking the objc_autoreleaseReturnValue and objc_retainAutoreleaseReturnValue 
call sites as tail calls unconditionally.  While it's theoretically true that
this is just an optimization, it's an optimization that we very much want to
happen even at -O0, or else ARC applications become substantially harder to
debug.  See r169796 for the llvm/fast-isel side of things.
rdar://12553082

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@169996 91177308-0d34-0410-b5e6-96231b3b80d8
[analyzer] Don't crash running destructors for multidimensional arrays.

We don't handle array destructors correctly yet, but we now apply the same
hack (explicitly destroy the first element, implicitly invalidate the rest)
for multidimensional arrays that we already use for linear arrays.

<rdar://problem/12858542>

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@170000 91177308-0d34-0410-b5e6-96231b3b80d8
[driver] Don't warn about an unused -flto option.
rdar://12851905

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@170010 91177308-0d34-0410-b5e6-96231b3b80d8
Rewrite calls to bitcast unprototyped functions when emitting a definition.

My variadics patch, r169588, changed these calls to typically be
bitcasts rather than calls to a supposedly variadic function.
This totally subverted a hack where we intentionally dropped
excess arguments from such calls in order to appease the inliner
and a "warning" from the optimizer.  This patch extends the hack
to also work with bitcasts, as well as teaching it to rewrite
invokes.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@170034 91177308-0d34-0410-b5e6-96231b3b80d8
[ms-inline asm] Test case for r170037.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@170038 91177308-0d34-0410-b5e6-96231b3b80d8
[objc] For the ARC error that is emitted when a synthesized property implementation
has inconsistent ownership with the backing ivar, point the error location to the
ivar.

Pointing to the ivar (instead of the @synthesize) is better since this is where a fix is needed.
Also provide the location of @synthesize via a note.

This also fixes the problem where an auto-synthesized property would emit an error without
any location.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@170039 91177308-0d34-0410-b5e6-96231b3b80d8
[arcmt] When capturing ARC errors, have a sanity check to make sure
the diagnostic has a valid location.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@170040 91177308-0d34-0410-b5e6-96231b3b80d8
docs: Initial Sphinx setup for Clang.

I don't think this will be visible just yet on <clang.llvm.org/docs/>
since I don't think that the necessary server-side setup has taken
place.

Don't shoot me over the theme. I don't want to duplicate LLVM's theme
into the clang repo at the moment, so I just used one of Sphinx's
default themes.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@170042 91177308-0d34-0410-b5e6-96231b3b80d8
docs: Test commit (sphinx autoupdating).

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@170046 91177308-0d34-0410-b5e6-96231b3b80d8
docs: Another test commit (sphinx autoupdating).

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@170047 91177308-0d34-0410-b5e6-96231b3b80d8
docs: Convert some docs to reST.

Converts:
    LanguageExtensions
    LibASTMatchers
    LibTooling
    PCHInternals
    ThreadSanitizer
    Tooling

Patch by Mykhailo Pustovit!
(with minor edits by Dmitri Gribenko and Sean Silva)

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@170048 91177308-0d34-0410-b5e6-96231b3b80d8
More hacking on mapDiagnosticRanges to make it handle more cases.
This still isn't quite right, but it fixes a crash.

I factored out findCommonParent because we need it on the result of 
getImmediateExpansionRange: for a function macro, the beginning
and end of an expansion range can come out of different
macros/macro arguments, which means the resulting range is a complete
mess to handle consistently.

I also made some changes to how findCommonParent works; it works somewhat
better in some cases, and somewhat worse in others, but I think overall
it's a better balance.  I'm coming to the conclusion that mapDiagnosticRanges
isn't using the right algorithm, though: chasing the caret is fundamentally
more complicated than any algorithm which only considers one FileID for the
caret can handle because each SourceLocation doesn't really have a single parent.
We need to follow the same path of choosing expansion locations and spelling
locations which the caret used to come up with the correct range
in the general case.

Fixes <rdar://problem/12847524>.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@170049 91177308-0d34-0410-b5e6-96231b3b80d8
Add missing check for error return from DefaultLvalueConversion.  Fixes <rdar://problem/12857416>.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@170056 91177308-0d34-0410-b5e6-96231b3b80d8
objc: DOn't complain if a (SEL) expression is typecast
to (SEL). Fixes // rdar://12859590


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@170058 91177308-0d34-0410-b5e6-96231b3b80d8
[analyzer] Fix a self-init checker false positive.

This is a Band-Aid fix to a false positive, where we complain about not
initializing self to [super init], where self is not coming from the
init method, but is coming from the caller to init.

The proper solution would be to associate the self and it's state with
the enclosing init.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@170059 91177308-0d34-0410-b5e6-96231b3b80d8
docs: More reST conversion.

Sorry for the large commit, but it is much faster to convert in batches.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@170067 91177308-0d34-0410-b5e6-96231b3b80d8
Using CanQualType::getAs<ArrayType> is unsafe; fix the code currently using it,
and make sure additional uses don't get introduced.  <rdar://problem/12858424>.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@170081 91177308-0d34-0410-b5e6-96231b3b80d8
[analyzer] Generalize ObjCMissingSuperCallChecker.

We now check a few methods for UIResponder, NSResponder, and NSDocument.

Patch by Julian Mayer!

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@170089 91177308-0d34-0410-b5e6-96231b3b80d8