Patch by Chris Wailes <chris.wailes@gmail.com>.
Reviewed by delesley, dblaikie.

Add the annotations and code needed to support a basic 'consumed' analysis.

Summary:
This new analysis is based on academic literature on linear types.  It tracks
the state of a value, either as unconsumed, consumed, or unknown.  Methods are
then annotated as CallableWhenUnconsumed, and when an annotated method is
called while the value is in the 'consumed' state a warning is issued.  A value
may be tested in the conditional statement of an if-statement; when this occurs
we know the state of the value in the different branches, and this information
is added to our analysis.  The code is still highly experimental, and the names
of annotations or the algorithm may be subject to change.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@188206 91177308-0d34-0410-b5e6-96231b3b80d8
Fix crash w/BlockDecl and invalid qualified decl.

I'm not really satisfied with the ad-hoc nature of
Sema::diagnoseQualifiedDeclaration, but I'm not sure how to fix it.

Fixes <rdar://problem/14639501>.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@188208 91177308-0d34-0410-b5e6-96231b3b80d8
Fix pretty-printing for unnamed unions.

This is just a couple of minor fixes to account for the existence
of ElaboratedType.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@188209 91177308-0d34-0410-b5e6-96231b3b80d8
clang-cl: Support the /Fe option

This is used to name the linked output file.

Differential Revision: http://llvm-reviews.chandlerc.com/D1344

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@188210 91177308-0d34-0410-b5e6-96231b3b80d8