Move the XFAIL out of the middle of a comment.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180659 91177308-0d34-0410-b5e6-96231b3b80d8
Use the target triple from the target machine rather than the module
to determine whether or not we're on a darwin platform for debug code
emitting.

Solves the problem of a module with no triple on the command line
and no triple in the module using non-gdb ok features on darwin. Fix
up the member-pointers test to check the correct things for cross
platform (DW_FORM_flag is a good prefix).

Unfortunately no testcase because I have no ideas how to test something
without a triple and without a triple in the module yet check
precisely on two platforms. Ideas welcome.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180660 91177308-0d34-0410-b5e6-96231b3b80d8
whitespace

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180665 91177308-0d34-0410-b5e6-96231b3b80d8
Add target flags to MachineMemOperands.

This seems to me an obvious place to allow target passes to annotate
memory operations. There are plenty of bits, and I'm not aware of
another good way for early target passes to propagate hints along to
later passes. Target independent transforms can simply preserve them,
the way they preserve the other flags. Like MachineMemOperands in
general, if the target flags are lost we must still generate correct
code.

This has lots of uses, but I want this flexibility now to make it
easier to work with the new MachineTraceMetrics
analysis. MachineTraceMetrics can gather a lot of information about
instructions based on the surrounding code. This information can be
used to influence postRA machine passes that don't work on SSA form.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180666 91177308-0d34-0410-b5e6-96231b3b80d8
Generalize the MachineTraceMetrics public API.

Naturally, we should be able to pass in extra instructions, not just
extra blocks.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180667 91177308-0d34-0410-b5e6-96231b3b80d8