Simplify ownership of ExplodedGraph in the CoreEngine by removing unique_ptr indirection.

Summary: I was going to fix the use of raw pointer ownership in "takeGraph" when I realized that function was unused and the whole ExplodedGraph could just be owned by value without the std::unique_ptr indirection at all.

Reviewers: jordan_rose

Differential Revision: http://reviews.llvm.org/D4833

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@215257 91177308-0d34-0410-b5e6-96231b3b80d8
Add a cc1 "dump-coverage-mapping" for testing coverage mapping.

Differential Revision: http://reviews.llvm.org/D4799


git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@215258 91177308-0d34-0410-b5e6-96231b3b80d8
Predefine IB_DESIGNABLE and IBInspectable macros. <rdar://problem/17441860>

These macros are used as markers for Interface Builder and need to be defined
to empty strings since they have no impact on the code.

Patch by Ted Kremenek.

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@215259 91177308-0d34-0410-b5e6-96231b3b80d8
Add predefined macros to identify x86_64h architectures.

Patch by Jim Grosbach.

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@215260 91177308-0d34-0410-b5e6-96231b3b80d8
Add tests for coverage mapping generation.

This patch adds the tests for the coverage mapping generation. 
Most of the tests check the mapping regions produced by 
the generator, and one checks the llvm IR.

Differential Revision: http://reviews.llvm.org/D4793


git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@215261 91177308-0d34-0410-b5e6-96231b3b80d8