Add a SelectionDAG getTargetInsertSubreg convenience function,

similar to getTargetExtractSubreg.

llvm-svn: 83564

llvm/include/llvm/CodeGen/SelectionDAG.h

@@ -708,6 +708,11 @@ public:
   SDValue getTargetExtractSubreg(int SRIdx, DebugLoc DL, EVT VT,
                                  SDValue Operand);
 
+  /// getTargetInsertSubreg - A convenience function for creating
+  /// TargetInstrInfo::INSERT_SUBREG nodes.
+  SDValue getTargetInsertSubreg(int SRIdx, DebugLoc DL, EVT VT,
+                                SDValue Operand, SDValue Subreg);
+
   /// getNodeIfExists - Get the specified node if it's already available, or
   /// else return NULL.
   SDNode *getNodeIfExists(unsigned Opcode, SDVTList VTs,

llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp

@@ -4769,6 +4769,17 @@ SelectionDAG::getTargetExtractSubreg(int SRIdx, DebugLoc DL, EVT VT,
   return SDValue(Subreg, 0);
 }
 
+/// getTargetInsertSubreg - A convenience function for creating
+/// TargetInstrInfo::INSERT_SUBREG nodes.
+SDValue
+SelectionDAG::getTargetInsertSubreg(int SRIdx, DebugLoc DL, EVT VT,
+                                    SDValue Operand, SDValue Subreg) {
+  SDValue SRIdxVal = getTargetConstant(SRIdx, MVT::i32);
+  SDNode *Result = getMachineNode(TargetInstrInfo::INSERT_SUBREG, DL,
+                                  VT, Operand, Subreg, SRIdxVal);
+  return SDValue(Result, 0);
+}
+
 /// getNodeIfExists - Get the specified node if it's already available, or
 /// else return NULL.
 SDNode *SelectionDAG::getNodeIfExists(unsigned Opcode, SDVTList VTList,