[SelectionDAG] Make isConstantIntBuildVectorOrConstantInt and isConstantFPBuildVectorOrConstantFP methods const.

Author: topperc

llvm/include/llvm/CodeGen/SelectionDAG.h

@@ -1959,14 +1959,14 @@ class SelectionDAG {
   }
 
   /// Test whether the given value is a constant int or similar node.
-  SDNode *isConstantIntBuildVectorOrConstantInt(SDValue N);
+  SDNode *isConstantIntBuildVectorOrConstantInt(SDValue N) const;
 
   /// Test whether the given value is a constant FP or similar node.
-  SDNode *isConstantFPBuildVectorOrConstantFP(SDValue N);
+  SDNode *isConstantFPBuildVectorOrConstantFP(SDValue N) const ;
 
   /// \returns true if \p N is any kind of constant or build_vector of
   /// constants, int or float. If a vector, it may not necessarily be a splat.
-  inline bool isConstantValueOfAnyType(SDValue N) {
+  inline bool isConstantValueOfAnyType(SDValue N) const {
     return isConstantIntBuildVectorOrConstantInt(N) ||
            isConstantFPBuildVectorOrConstantFP(N);
   }

llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp

@@ -10068,7 +10068,7 @@ bool ShuffleVectorSDNode::isSplatMask(const int *Mask, EVT VT) {
 
 // Returns the SDNode if it is a constant integer BuildVector
 // or constant integer.
-SDNode *SelectionDAG::isConstantIntBuildVectorOrConstantInt(SDValue N) {
+SDNode *SelectionDAG::isConstantIntBuildVectorOrConstantInt(SDValue N) const {
   if (isa<ConstantSDNode>(N))
     return N.getNode();
   if (ISD::isBuildVectorOfConstantSDNodes(N.getNode()))
@@ -10085,7 +10085,7 @@ SDNode *SelectionDAG::isConstantIntBuildVectorOrConstantInt(SDValue N) {
   return nullptr;
 }
 
-SDNode *SelectionDAG::isConstantFPBuildVectorOrConstantFP(SDValue N) {
+SDNode *SelectionDAG::isConstantFPBuildVectorOrConstantFP(SDValue N) const {
   if (isa<ConstantFPSDNode>(N))
     return N.getNode();