Reinstate "Nuke the old JIT."

Approved by Jim Grosbach, Lang Hames, Rafael Espindola.

This reinstates commits r215111, 215115, 215116, 215117, 215136.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216982 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/ARM/ARMSubtarget.cpp

@@ -15,7 +15,6 @@
 #include "ARMFrameLowering.h"
 #include "ARMISelLowering.h"
 #include "ARMInstrInfo.h"
-#include "ARMJITInfo.h"
 #include "ARMSelectionDAGInfo.h"
 #include "ARMSubtarget.h"
 #include "ARMMachineFunctionInfo.h"
@@ -160,7 +159,7 @@ ARMSubtarget::ARMSubtarget(const std::string &TT, const std::string &CPU,
       ARMProcClass(None), stackAlignment(4), CPUString(CPU), IsLittle(IsLittle),
       TargetTriple(TT), Options(Options), TargetABI(ARM_ABI_UNKNOWN),
       DL(computeDataLayout(initializeSubtargetDependencies(CPU, FS))),
-      TSInfo(DL), JITInfo(),
+      TSInfo(DL),
       InstrInfo(isThumb1Only()
                     ? (ARMBaseInstrInfo *)new Thumb1InstrInfo(*this)
                     : !isThumb()