InstCombine: canonicalize sext-and --> select
                          sext-not-and --> select.

Patch by Muhammad Tauqir Ahmad.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173901 91177308-0d34-0410-b5e6-96231b3b80d8
Attempt to fix dragonegg. Use the number of slots to determine if the AttributeSet has attributes or not.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173902 91177308-0d34-0410-b5e6-96231b3b80d8