Rewrite StackMap location handling to pre-compute the dwarf register

numbers before emission.

This removes a dependency on being able to access TRI at the module
level and is similar to the DwarfExpression handling. I've modified
the debug support into print/dump routines that'll do the same dumping
but is now callable anywhere and if TRI isn't available will go ahead
and just print out raw register numbers.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@232821 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/CodeGen/StackMaps.h

@@ -14,6 +14,7 @@
 #include "llvm/ADT/MapVector.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/CodeGen/MachineInstr.h"
+#include "llvm/Support/Debug.h"
 #include <map>
 #include <vector>
 
@@ -246,6 +247,9 @@ private:
 
   /// \brief Emit the callsite info for each stackmap/patchpoint intrinsic call.
   void emitCallsiteEntries(MCStreamer &OS, const TargetRegisterInfo *TRI);
+
+  void print(raw_ostream &OS);
+  void debug() { print(dbgs()); }
 };
 
 }