Initial implementation of PPCTargetTransformInfo

This provides a place to add customized operation cost information and
control some other target-specific IR-level transformations.

The only non-trivial logic in this checkin assigns a higher cost to
unaligned loads and stores (covered by the included test case).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173520 91177308-0d34-0410-b5e6-96231b3b80d8
Remove some introspection functions.

The 'getSlot' function and its ilk allow introspection into the AttributeSet
class. However, that class should be opaque. Allow access through accessor
methods instead.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173522 91177308-0d34-0410-b5e6-96231b3b80d8
Remove dead method.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173524 91177308-0d34-0410-b5e6-96231b3b80d8
Remove unused variables, silences -Wunused-variable


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173526 91177308-0d34-0410-b5e6-96231b3b80d8
llvm/test/CMakeLists.txt: Add a dependency to llvm-rtdyld in check-llvm.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173528 91177308-0d34-0410-b5e6-96231b3b80d8
A port of the Visual Studio 2012 debugger visualizers for common LLVM and clang datatypes.  Patch thanks to Nico Rieck!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173532 91177308-0d34-0410-b5e6-96231b3b80d8