Don't special case one line extern "C" decls.

We already avoided warning for

extern "C" const char *Version_string = "2.9";

now we also don't produce any warnings for

extern "C" {
  extern const char *Version_string2 = "2.9";
}

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178333 91177308-0d34-0410-b5e6-96231b3b80d8
Fix thinko (and the bots): We still want to warn in C.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178335 91177308-0d34-0410-b5e6-96231b3b80d8
Remove sign-compare warning on systems that still use 32 bit time_ts.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178351 91177308-0d34-0410-b5e6-96231b3b80d8
Hexagon: Set Hexagon tool-chain when configured as OSless target.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178358 91177308-0d34-0410-b5e6-96231b3b80d8
Improvement on r177086.
* Let DIType for block-captured self to point to the completed cached
  interface type.
rdar://problem/12767564

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178360 91177308-0d34-0410-b5e6-96231b3b80d8
Bugfix/Followup for r177086.
* Store the .block_descriptor (instead of self) in the alloca so we
  can guarantee that all captured variables are available at -O0.
* Add the missing OpDeref for the alloca.
rdar://problem/12767564

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178361 91177308-0d34-0410-b5e6-96231b3b80d8
Sema: Warn on sizeof on binary ops on decayed arrays.

The array will decay into a pointer, creating an unexpected result.
sizeof(array + int) is an easy to make typo for sizeof(array) + int.

This was motivated by a NetBSD security bug, used sizeof(key - r) instead of
sizeof(key) - r, reducing entropy in a random number generator.
http://cvsweb.netbsd.org/bsdweb.cgi/src/sys/kern/subr_cprng.c.diff?r1=1.14&r2=1.15&only_with_tag=MAIN&f=h

Differential Revision: http://llvm-reviews.chandlerc.com/D571

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178371 91177308-0d34-0410-b5e6-96231b3b80d8
[cmake] Add clang-headers as a dependency of libclang and if we have to copy them
for the IDE case, also create a symlink inside the libclang.dylib directory.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178372 91177308-0d34-0410-b5e6-96231b3b80d8
[libclang] If libclang logging is enabled, print all compiler diagnostics to stderr instead of capturing them.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178373 91177308-0d34-0410-b5e6-96231b3b80d8
When looking for overridden ObjC methods, don't ignore 'hidden' ones.

When using modules we should not ignore overridden methods from
categories that are hidden because the module is not visible.
This will give more consistent results (when imports change) and it's more
correct since the methods are indeed overridden even if they are not "visible"
for lookup purposes.

rdar://13350796

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178374 91177308-0d34-0410-b5e6-96231b3b80d8
[libclang] Add test case for r178374.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178378 91177308-0d34-0410-b5e6-96231b3b80d8
[analyzer] Look for a StmtPoint node instead of PostStmt in trackNullOrUndefValue.

trackNullOrUndefValue tries to find the first node that matches the statement it is tracking.
Since we collect PostStmt nodes (in node reclamation), none of those might be on the
current path, so relax the search to look for any StmtPoint.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178380 91177308-0d34-0410-b5e6-96231b3b80d8
[analyzer] Address Jordan’s review of r178309 - do not register an extra visitor for nil receiver

We can check if the receiver is nil in the node that corresponds to the StmtPoint of the message send.
At that point, the receiver is guaranteed to be live. We will find at least one unreclaimed node due to
my previous commit (look for StmtPoint instead of PostStmt) and the fact that the nil receiver nodes are tagged.

+ a couple of extra tests.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178381 91177308-0d34-0410-b5e6-96231b3b80d8