text: //===- Linalg.cpp - C Interface for Linalg dialect ------------------------===//
  //
  // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
  // See https://llvm.org/LICENSE.txt for license information.
  // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  //
  //===----------------------------------------------------------------------===//
  
  #include "mlir-c/Dialect/Linalg.h"
  #include "mlir/CAPI/Registration.h"
  #include "mlir/Dialect/Linalg/IR/LinalgOps.h"
  
  using namespace mlir;
  using namespace mlir::linalg;
  
  /// Apply the special region builder for the builtin named Linalg op.
  /// Assert that `op` is a builtin named Linalg op.
  void mlirLinalgFillBuiltinNamedOpRegion(MlirDialect linalgDialect,
                                          MlirOperation mlirOp, intptr_t n,
                                          MlirValue const *mlirCaptures) {
    Operation *op = unwrap(mlirOp);
    SmallVector<Value> captures;
    captures.reserve(n);
    for (unsigned idx = 0; idx < n; ++idx)
      captures.push_back(unwrap(mlirCaptures[idx]));
  
    LinalgDialect::RegionBuilderFunType fun =
        static_cast<LinalgDialect *>(unwrap(linalgDialect))
            ->getRegionBuilder(op->getName().getStringRef());
    assert(fun && "Expected a builtin named Linalg op.");
    assert(op->getNumRegions() == 1 && "Expected Linalg op with 1 region");
    assert(op->getRegion(0).getBlocks().empty() &&
           "Expected Linalg op with 0 blocks");
  
    SmallVector<Type, 8> argTypes;
    auto linalgOp = cast<LinalgOp>(op);
    for (OpOperand *opOperand : linalgOp.getInputAndOutputOperands())
      argTypes.push_back(getElementTypeOrSelf(opOperand->get().getType()));
  
    ImplicitLocOpBuilder b(op->getLoc(), op->getContext());
    Region &region = op->getRegion(0);
    Block *body = b.createBlock(&region, /*insertPt=*/{}, argTypes);
    b.setInsertionPointToStart(body);
    fun(b, *body, captures);
  }
  
  MLIR_DEFINE_CAPI_DIALECT_REGISTRATION(Linalg, linalg, LinalgDialect)
  