[Value] Mark getOperandNumber as Const (#189267)

mlir/include/mlir/IR/BlockSupport.h

@@ -35,7 +35,7 @@ public:
   static IRObjectWithUseList<BlockOperand> *getUseList(Block *value);
 
   /// Return which operand this is in the BlockOperand list of the Operation.
-  unsigned getOperandNumber();
+  unsigned getOperandNumber() const;
 };
 
 //===----------------------------------------------------------------------===//

mlir/include/mlir/IR/Value.h

@@ -259,7 +259,7 @@ public:
   }
 
   /// Return which operand this is in the OpOperand list of the Operation.
-  unsigned getOperandNumber();
+  unsigned getOperandNumber() const;
 
   /// Set the current value being used by this operand.
   void assign(Value value) { set(value); }

mlir/lib/IR/Value.cpp

@@ -214,7 +214,7 @@ IRObjectWithUseList<BlockOperand> *BlockOperand::getUseList(Block *value) {
 }
 
 /// Return which operand this is in the operand list.
-unsigned BlockOperand::getOperandNumber() {
+unsigned BlockOperand::getOperandNumber() const {
   return this - &getOwner()->getBlockOperands()[0];
 }
 
@@ -223,6 +223,6 @@ unsigned BlockOperand::getOperandNumber() {
 //===----------------------------------------------------------------------===//
 
 /// Return which operand this is in the operand list.
-unsigned OpOperand::getOperandNumber() {
+unsigned OpOperand::getOperandNumber() const {
   return this - &getOwner()->getOpOperands()[0];
 }