[mlir][linalg] Update Structured Op Interface (NFC).

Adding methods to access operand properties via OpOperands and mark outdated methods as deprecated.

Differential Revision: https://reviews.llvm.org/D103394

mlir/include/mlir/Dialect/Linalg/IR/LinalgInterfaces.h

@@ -25,6 +25,11 @@ namespace mlir {
 namespace linalg {
 class LinalgOp;
 
+/// OpOperand vector that implicitly converts to a Value vector.
+struct OpOperandVector : public SmallVector<OpOperand *> {
+  operator SmallVector<Value>();
+};
+
 /// Returns the values obtained by applying `map` to the list of values.
 SmallVector<Value, 4> applyMapToValues(OpBuilder &b, Location loc,
                                        AffineMap map, ValueRange values);

mlir/lib/Dialect/Linalg/IR/LinalgInterfaces.cpp

@@ -155,6 +155,14 @@ LogicalResult mlir::linalg::detail::verifyContractionInterface(Operation *op) {
 // StructuredOpInterface implementation
 //===----------------------------------------------------------------------===//
 
+OpOperandVector::operator SmallVector<Value>() {
+  SmallVector<Value> result;
+  result.reserve(this->size());
+  llvm::transform(*this, std::back_inserter(result),
+                  [](OpOperand *opOperand) { return opOperand->get(); });
+  return result;
+}
+
 /// Fully compose map with operands and canonicalize the result.
 /// Return the `createOrFold`'ed AffineApply op.
 static Value createFoldedComposedAffineApply(OpBuilder &b, Location loc,