Remove getDataLayout() from TargetSelectionDAGInfo (had no users)

Summary:
Remove empty subclass in the process.

This change is part of a series of commits dedicated to have a single
DataLayout during compilation by using always the one owned by the
module.

Reviewers: echristo

Subscribers: jholewinski, llvm-commits, rafael, yaron.keren, ted

Differential Revision: http://reviews.llvm.org/D11045

From: Mehdi Amini <mehdi.amini@apple.com>
llvm-svn: 241780
diff --git a/llvm/lib/Target/SystemZ/SystemZSelectionDAGInfo.cpp b/llvm/lib/Target/SystemZ/SystemZSelectionDAGInfo.cpp
index e7e0268..178aa38 100644
--- a/llvm/lib/Target/SystemZ/SystemZSelectionDAGInfo.cpp
+++ b/llvm/lib/Target/SystemZ/SystemZSelectionDAGInfo.cpp
@@ -18,12 +18,6 @@
 
 #define DEBUG_TYPE "systemz-selectiondag-info"
 
-SystemZSelectionDAGInfo::SystemZSelectionDAGInfo(const DataLayout &DL)
-    : TargetSelectionDAGInfo(&DL) {}
-
-SystemZSelectionDAGInfo::~SystemZSelectionDAGInfo() {
-}
-
 // Decide whether it is best to use a loop or straight-line code for
 // a block operation of Size bytes with source address Src and destination
 // address Dest.  Sequence is the opcode to use for straight-line code
diff --git a/llvm/lib/Target/SystemZ/SystemZSelectionDAGInfo.h b/llvm/lib/Target/SystemZ/SystemZSelectionDAGInfo.h
index a257d6b..246fa3e 100644
--- a/llvm/lib/Target/SystemZ/SystemZSelectionDAGInfo.h
+++ b/llvm/lib/Target/SystemZ/SystemZSelectionDAGInfo.h
@@ -22,8 +22,7 @@
 
 class SystemZSelectionDAGInfo : public TargetSelectionDAGInfo {
 public:
-  explicit SystemZSelectionDAGInfo(const DataLayout &DL);
-  ~SystemZSelectionDAGInfo();
+  explicit SystemZSelectionDAGInfo() = default;
 
   SDValue EmitTargetCodeForMemcpy(SelectionDAG &DAG, SDLoc DL, SDValue Chain,
                                   SDValue Dst, SDValue Src,
diff --git a/llvm/lib/Target/SystemZ/SystemZSubtarget.cpp b/llvm/lib/Target/SystemZ/SystemZSubtarget.cpp
index eb5e5c0..0b49fcd 100644
--- a/llvm/lib/Target/SystemZ/SystemZSubtarget.cpp
+++ b/llvm/lib/Target/SystemZ/SystemZSubtarget.cpp
@@ -42,7 +42,7 @@
       HasTransactionalExecution(false), HasProcessorAssist(false),
       HasVector(false), TargetTriple(TT),
       InstrInfo(initializeSubtargetDependencies(CPU, FS)), TLInfo(TM, *this),
-      TSInfo(*TM.getDataLayout()), FrameLowering() {}
+      TSInfo(), FrameLowering() {}
 
 // Return true if GV binds locally under reloc model RM.
 static bool bindsLocally(const GlobalValue *GV, Reloc::Model RM) {