TargetSubtargetInfo: Move implementation to lib/CodeGen; NFC

TargetSubtargetInfo is filled with CodeGen specific interfaces nowadays
(getInstrInfo(), getFrameLowering(), getSelectionDAGInfo()) most of the
tuning flags like enablePostRAScheduler(), getAntiDepBreakMode(),
enableRALocalReassignment(), ... also do not seem to be universal enough
to make sense outside of CodeGen.

Differential Revision: https://reviews.llvm.org/D26948

llvm-svn: 287708

lib/CodeGen/CMakeLists.txt

@@ -136,6 +136,7 @@ add_llvm_library(LLVMCodeGen
   TargetPassConfig.cpp
   TargetRegisterInfo.cpp
   TargetSchedule.cpp
+  TargetSubtargetInfo.cpp
   TwoAddressInstructionPass.cpp
   UnreachableBlockElim.cpp
   VirtRegMap.cpp

lib/CodeGen/TargetSubtargetInfo.cpp

@@ -7,7 +7,7 @@
 //
 //===----------------------------------------------------------------------===//
 //
-// This file describes the general parts of a Subtarget.
+/// \file This file describes the general parts of a Subtarget.
 //
 //===----------------------------------------------------------------------===//
 

lib/Target/CMakeLists.txt

@@ -6,7 +6,6 @@ add_llvm_library(LLVMTarget
   TargetLoweringObjectFile.cpp
   TargetMachine.cpp
   TargetMachineC.cpp
-  TargetSubtargetInfo.cpp
 
   ADDITIONAL_HEADER_DIRS
   ${LLVM_MAIN_INCLUDE_DIR}/llvm/Target