[PowerPC] Add some FIXMEs

A bunch of extendend mnemomics ought to support '.' forms.
Add FIXMEs to the test case for those.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184757 91177308-0d34-0410-b5e6-96231b3b80d8
PPC: Remove default case from fully covered switch.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184758 91177308-0d34-0410-b5e6-96231b3b80d8
Improve diagnostics when getSizeInBits is called on the Other type.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184760 91177308-0d34-0410-b5e6-96231b3b80d8
DebugInfo: DIBuilder changes to match DIEnumerator changes in r184694

Representing enumerators by int64 instead of uint64 for now. At some
point we need to address the underlying issue of representation
depending on the specific enumeration.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184761 91177308-0d34-0410-b5e6-96231b3b80d8
Add a simpler version of is_regular_file.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184764 91177308-0d34-0410-b5e6-96231b3b80d8