[PATCH] Extend the statepoint intrinsic to allow statepoints to be marked as transitions from GC-aware code to code that is not GC-aware.

[Philip Reames]

================
Comment at: lib/CodeGen/SelectionDAG/StatepointLowering.cpp:672
@@ +671,3 @@
+      (Flags & (uint64_t)StatepointFlags::MaskAll) == 0 && "unknown flag used");
+  const int Shift = 1;
+  static_assert(
----------------
pgavlin wrote:
> reames wrote:
> > This shift should be define in StackMaps.h for the StatepointOperands class with a more clear name.  
> > 
> > The other option is to just split this operand into 2.  I have no idea why I masked them to start with, that's just unnecessary complexity.  Might be better to do this as a separate change though.
> I like the sound of the latter option. Do you mind if I do this in a separate change?
I'd prefer that actually.  Given the future change, this portion is fine for submission.

http://reviews.llvm.org/D9501

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