Reverted r375425 as it broke some buildbots.

llvm-svn: 375444
diff --git a/llvm/lib/CodeGen/LiveDebugValues.cpp b/llvm/lib/CodeGen/LiveDebugValues.cpp
index ca20b11..f1b237d 100644
--- a/llvm/lib/CodeGen/LiveDebugValues.cpp
+++ b/llvm/lib/CodeGen/LiveDebugValues.cpp
@@ -1439,7 +1439,8 @@
   TRI = MF.getSubtarget().getRegisterInfo();
   TII = MF.getSubtarget().getInstrInfo();
   TFI = MF.getSubtarget().getFrameLowering();
-  TFI->getCalleeSaves(MF, CalleeSavedRegs);
+  TFI->determineCalleeSaves(MF, CalleeSavedRegs,
+                            std::make_unique<RegScavenger>().get());
   LS.initialize(MF);
 
   bool Changed = ExtendRanges(MF);