Simplify EmitLabel.

All the "real" streamers were already calling to MCStreamer::EmitLabel
to do part of the work.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211646 91177308-0d34-0410-b5e6-96231b3b80d8
Simplify the handling of .cfi_endproc.

No functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211651 91177308-0d34-0410-b5e6-96231b3b80d8
[RuntimeDyld] Adds the necessary hooks to MCJIT to be able to debug generated
MachO files using the GDB JIT debugging interface.

Patch by Keno Fischer. Thanks Keno!



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211652 91177308-0d34-0410-b5e6-96231b3b80d8
Move some trivial methods up to MCStreamer.

This saves some duplicated boilerplate in RecordStreamer and NullStreamer.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211653 91177308-0d34-0410-b5e6-96231b3b80d8
Use SourceMgr::getMemoryBuffer() in a couple of places

Cleanup only.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211656 91177308-0d34-0410-b5e6-96231b3b80d8