ARM IAS: support .inst directive

This adds support for the .inst directive.  This is an ARM specific directive to
indicate an instruction encoded as a constant expression.  The major difference
between .word, .short, or .byte and .inst is that the latter will be
disassembled as an instruction since it does not get flagged as data.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@197657 91177308-0d34-0410-b5e6-96231b3b80d8
Fix missing C++ mode comment

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@197658 91177308-0d34-0410-b5e6-96231b3b80d8
R600/SI: Make private pointers be 32-bit.

Different sized address spaces should theoretically work
most of the time now, and since 64-bit add is currently
disabled, using more 32-bit pointers fixes some cases.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@197659 91177308-0d34-0410-b5e6-96231b3b80d8