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Explicit operator bool doesn't not play nicely with gtest assertion
macros (i.e. it performs as advertised and I wish that gtest subverted
it for me).

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This change was somehow missed from r201618

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Provides a way to merge multiple vfs::FileSystem objects into a single
filesystem.

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Accidentally piped the stdout from make_cxx_dr_status into
cxx_dr_status.html


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DR18 previously forebode typedefs to be used as parameter types if they
were of type 'void'.  DR577 allows 'void' to be used as a function
parameter type regardless from where it came.


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TU is not guaranteed to be initialised in all cases.  In particular if CIdx or
ast_filename is NULL (or if &TU is NULL), then clang_createTranslationUnit2 will
not initialise the out parameter out_TU.  This is followed by an assertion check
which may perform a branch based on unitialised memory.

Caught by scan-build.

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Clang never produces a linker private object, so this code is dead.

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_Atomic qualifier applied to a reference type.


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This adds the minimum virtual file system support to start migrating
FileManager onto the VFS.

Originally discussed here:
http://lists.cs.uiuc.edu/pipermail/cfe-dev/2014-February/035188.html

Differential Revision: http://llvm-reviews.chandlerc.com/D2745

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This makes Clang and LLVM -Wmsvc-include clean.

I believe the correct behavior here is to avoid updating the cache when
we find the header via MSVC's search rules.

Differential Revision: http://llvm-reviews.chandlerc.com/D2733

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On machines that have cl.exe on PATH, the note will print the full path.

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Summary:
Generally the vector deleting dtor, which we model as a vtable thunk,
takes care of non-virtual adjustment and delegates to the other
destructor variants.  The other non-complete destructor variants assume
that 'this' on entry points to the virtual base subobject that first
declared the virtual destructor.

We need to change the adjustment in both the prologue and the vdtor call
setup.

Reviewers: timurrrr

CC: cfe-commits

Differential Revision: http://llvm-reviews.chandlerc.com/D2821

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Experiment with making -Wunreachable-code more immediately useful by restricting warnings to those issued in the main file.

This warning has a whole bunch of known false positives, much of them due
to code that is "sometimes unreachable".  This can caused by code that
is conditionally generated by the preprocessor, branches that are defined
in terms of architecture-specific details (e.g., the size of a type), and
so on.  While these are all good things to address one by one, the reality
is that this warning has received little love lately.  By restricting
its purvue, we can focus on the top issues effecting main files, which
should be smaller, and then gradually widen the scope.

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This makes it a lot easier to see what's going on from the output.

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No functional change intended.

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It doesn't conflict with any cl.exe options and it's useful for debugging.

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This is an undocumented, but reportedly widely used flag.
We don't support it, but should be able to parse it.

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Missed updating this test case with r201585 -- the lockable attribute is now internally represented by CapabilityAttr.

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Extend the test (like it is done in scan-build) to check also if the variable 
is empty or not.



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DeLesley Hutchins (who wrote the original thread-safety attribute functionality) and I have agreed to start migrating from lock-specific terminology to "capability"-specific terminology. This opens the door for future threading-related analysis passes so that a common nomenclature can be used.

The following attributes have been (silently) deprecated, with their replacements listed:

lockable => capability
exclusive_locks_required => requires_capability
shared_locks_required => requires_shared_capability
locks_excluded => requires_capability

There are no functional changes intended.

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...as well as fake flexible array members: structs that end in arrays with
length 0 or 1.

Patch by Daniel Fahlgren!

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Recommit r201346, reverted in r201373.


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Extended qualifiers can appear in many places, refactor the code so it's
more reusable.  Add tests in areas where we've increased compatibility.


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Pointer types in the MSVC ABI are a bit awkward, the width of the
pointer is considered a kind of CVR qualifier.

Restrict is handled similarly to const and volatile but is mangled after
the pointer width qualifier.

This fixes PR18880.


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temporary in a decltype expression only applies if that temporary was created
by a function call, not by a function-style cast or other flavour of
expression.


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ExtWarn, since it's an extension.


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