Remove the MachineMove class.

It was just a less powerful and more confusing version of
MCCFIInstruction. A side effect is that, since MCCFIInstruction uses
dwarf register numbers, calls to getDwarfRegNum are pushed out, which
should allow further simplifications.

I left the MachineModuleInfo::addFrameMove interface unchanged since
this patch was already fairly big.

llvm-svn: 181680
diff --git a/llvm/lib/Target/Hexagon/MCTargetDesc/HexagonMCTargetDesc.cpp b/llvm/lib/Target/Hexagon/MCTargetDesc/HexagonMCTargetDesc.cpp
index 273bc22..2f93a52 100644
--- a/llvm/lib/Target/Hexagon/MCTargetDesc/HexagonMCTargetDesc.cpp
+++ b/llvm/lib/Target/Hexagon/MCTargetDesc/HexagonMCTargetDesc.cpp
@@ -54,13 +54,14 @@
   return X;
 }
 
-static MCAsmInfo *createHexagonMCAsmInfo(StringRef TT) {
+static MCAsmInfo *createHexagonMCAsmInfo(const MCRegisterInfo &MRI,
+                                         StringRef TT) {
   MCAsmInfo *MAI = new HexagonMCAsmInfo(TT);
 
   // VirtualFP = (R30 + #0).
-  MachineLocation Dst(MachineLocation::VirtualFP);
-  MachineLocation Src(Hexagon::R30, 0);
-  MAI->addInitialFrameState(0, Dst, Src);
+  MCCFIInstruction Inst = MCCFIInstruction::createDefCfa(
+      0, Hexagon::R30, 0);
+  MAI->addInitialFrameState(Inst);
 
   return MAI;
 }