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//===- ValueBoundsOpInterfaceImpl.cpp - Impl. of ValueBoundsOpInterface ---===//
//
// 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/Dialect/Linalg/IR/ValueBoundsOpInterfaceImpl.h"
#include "mlir/Dialect/Linalg/IR/Linalg.h"
#include "mlir/Interfaces/ValueBoundsOpInterface.h"
using namespace mlir;
namespace mlir {
namespace linalg {
namespace {
struct IndexOpInterface
: public ValueBoundsOpInterface::ExternalModel<IndexOpInterface, IndexOp> {
void populateBoundsForIndexValue(Operation *op, Value value,
ValueBoundsConstraintSet &cstr) const {
auto indexOp = cast<IndexOp>(op);
auto linalgOp = indexOp->getParentOfType<LinalgOp>();
assert(value == indexOp.getResult() && "invalid value");
// index >= 0
cstr.bound(value) >= 0;
// index < dim size
int64_t flatDimPos =
cast<AffineDimExpr>(
linalgOp.getShapesToLoopsMap().getResult(indexOp.getDim()))
.getPosition();
// Find the `flatDimPos`-th operand dimension.
int64_t flatDimCtr = 0;
for (Value operand : linalgOp->getOperands()) {
assert(flatDimPos >= flatDimCtr && "invalid pos");
auto shapedType = llvm::cast<ShapedType>(operand.getType());
if (flatDimPos < flatDimCtr + shapedType.getRank()) {
cstr.bound(value) < cstr.getExpr(operand, flatDimPos - flatDimCtr);
break;
}
flatDimCtr += shapedType.getRank();
}
}
};
} // namespace
} // namespace linalg
} // namespace mlir
void mlir::linalg::registerValueBoundsOpInterfaceExternalModels(
DialectRegistry ®istry) {
registry.addExtension(+[](MLIRContext *ctx, linalg::LinalgDialect *dialect) {
IndexOp::attachInterface<IndexOpInterface>(*ctx);
// Note: ValueBoundsOpInterface implementation is not required for ops that
// implement `DestinationStyleOpInterface` (for querying shaped OpResults).
});
}
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