[SelectionDAG] Move GlobalAddressSDNode and AddrSpaceCastSDNode constructors into header. NFC

These constructors are no more complicated than any of the other
*SDNode constructors that are already in the header.

Author: topperc

llvm/include/llvm/CodeGen/SelectionDAGNodes.h

@@ -1284,7 +1284,9 @@ class AddrSpaceCastSDNode : public SDNode {
 
 public:
   AddrSpaceCastSDNode(unsigned Order, const DebugLoc &dl, SDVTList VTs,
-                      unsigned SrcAS, unsigned DestAS);
+                      unsigned SrcAS, unsigned DestAS)
+      : SDNode(ISD::ADDRSPACECAST, Order, dl, VTs), SrcAddrSpace(SrcAS),
+        DestAddrSpace(DestAS) {}
 
   unsigned getSrcAddressSpace() const { return SrcAddrSpace; }
   unsigned getDestAddressSpace() const { return DestAddrSpace; }
@@ -1819,7 +1821,9 @@ class GlobalAddressSDNode : public SDNode {
 
   GlobalAddressSDNode(unsigned Opc, unsigned Order, const DebugLoc &DL,
                       const GlobalValue *GA, SDVTList VTs, int64_t o,
-                      unsigned TF);
+                      unsigned TF)
+      : SDNode(Opc, Order, DL, VTs), TheGlobal(GA), Offset(o), TargetFlags(TF) {
+  }
 
 public:
   const GlobalValue *getGlobal() const { return TheGlobal; }

llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp

@@ -11807,20 +11807,6 @@ HandleSDNode::~HandleSDNode() {
   DropOperands();
 }
 
-GlobalAddressSDNode::GlobalAddressSDNode(unsigned Opc, unsigned Order,
-                                         const DebugLoc &DL,
-                                         const GlobalValue *GA, SDVTList VTs,
-                                         int64_t o, unsigned TF)
-    : SDNode(Opc, Order, DL, VTs), Offset(o), TargetFlags(TF) {
-  TheGlobal = GA;
-}
-
-AddrSpaceCastSDNode::AddrSpaceCastSDNode(unsigned Order, const DebugLoc &dl,
-                                         SDVTList VTs, unsigned SrcAS,
-                                         unsigned DestAS)
-    : SDNode(ISD::ADDRSPACECAST, Order, dl, VTs), SrcAddrSpace(SrcAS),
-      DestAddrSpace(DestAS) {}
-
 MemSDNode::MemSDNode(unsigned Opc, unsigned Order, const DebugLoc &dl,
                      SDVTList VTs, EVT memvt, MachineMemOperand *mmo)
     : SDNode(Opc, Order, dl, VTs), MemoryVT(memvt), MMO(mmo) {