Add the global namespace (the "::" namespace specifier) to the list of
namespaces to try for potential typo corrections.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@184762 91177308-0d34-0410-b5e6-96231b3b80d8
[AST] Introduce a new DecayedType sugar node

The goal of this sugar node is to be able to look at an arbitrary
FunctionType and tell if any of the parameters were decayed from an
array or function type.  Ultimately this is necessary to implement
Microsoft's C++ name mangling scheme, which mangles decayed arrays
differently from normal pointers.

Reviewers: rsmith

Differential Revision: http://llvm-reviews.chandlerc.com/D1014

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@184763 91177308-0d34-0410-b5e6-96231b3b80d8
Convert last use of PathV1.h in Compilation.cpp

The way we decide which file to remove is fairly odd. I took a quick look at
maybe changing that, but it would be a more work than I want to put at this
right now, so I left pair of FIXMEs.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@184766 91177308-0d34-0410-b5e6-96231b3b80d8
[analyzer] Add a debug checker that prints Exploded Graph
Add a debug checker that is useful to understand how the ExplodedGraph is
built; it can be triggered using the following command:

 clang -cc1 -analyze -analyzer-checker=debug.ViewExplodedGraph my_program.c

A patch by Béatrice Creusillet!

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@184768 91177308-0d34-0410-b5e6-96231b3b80d8
Use the simpler version of llvm::sys::fs::exists.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@184770 91177308-0d34-0410-b5e6-96231b3b80d8
Convert some uses of llvm::sys::Path.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@184774 91177308-0d34-0410-b5e6-96231b3b80d8
Use getAs<> where appropriate on QualTypes instead of using dyn_cast.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@184775 91177308-0d34-0410-b5e6-96231b3b80d8