| 1 | //===- ValueBoundsOpInterfaceImpl.cpp - Impl. of ValueBoundsOpInterface ---===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | #include "mlir/Dialect/Linalg/IR/ValueBoundsOpInterfaceImpl.h" |
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| 10 | |
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| 11 | #include "mlir/Dialect/Linalg/IR/Linalg.h" |
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| 12 | #include "mlir/Interfaces/ValueBoundsOpInterface.h" |
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| 13 | |
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| 14 | using namespace mlir; |
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| 15 | |
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| 16 | namespace mlir { |
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| 17 | namespace linalg { |
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| 18 | namespace { |
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| 19 | |
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| 20 | struct IndexOpInterface |
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| 21 | : public ValueBoundsOpInterface::ExternalModel<IndexOpInterface, IndexOp> { |
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| 22 | void populateBoundsForIndexValue(Operation *op, Value value, |
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| 23 | ValueBoundsConstraintSet &cstr) const { |
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| 24 | auto indexOp = cast<IndexOp>(op); |
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| 25 | auto linalgOp = indexOp->getParentOfType<LinalgOp>(); |
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| 26 | assert(value == indexOp.getResult() && "invalid value" ); |
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| 27 | |
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| 28 | // index >= 0 |
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| 29 | cstr.bound(value) >= 0; |
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| 30 | |
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| 31 | // index < dim size |
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| 32 | int64_t flatDimPos = |
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| 33 | cast<AffineDimExpr>( |
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| 34 | linalgOp.getShapesToLoopsMap().getResult(indexOp.getDim())) |
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| 35 | .getPosition(); |
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| 36 | // Find the `flatDimPos`-th operand dimension. |
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| 37 | int64_t flatDimCtr = 0; |
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| 38 | for (Value operand : linalgOp->getOperands()) { |
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| 39 | assert(flatDimPos >= flatDimCtr && "invalid pos" ); |
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| 40 | auto shapedType = llvm::cast<ShapedType>(operand.getType()); |
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| 41 | if (flatDimPos < flatDimCtr + shapedType.getRank()) { |
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| 42 | cstr.bound(value) < cstr.getExpr(operand, flatDimPos - flatDimCtr); |
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| 43 | break; |
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| 44 | } |
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| 45 | flatDimCtr += shapedType.getRank(); |
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| 46 | } |
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| 47 | } |
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| 48 | }; |
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| 49 | |
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| 50 | } // namespace |
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| 51 | } // namespace linalg |
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| 52 | } // namespace mlir |
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| 53 | |
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| 54 | void mlir::linalg::registerValueBoundsOpInterfaceExternalModels( |
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| 55 | DialectRegistry ®istry) { |
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| 56 | registry.addExtension(extensionFn: +[](MLIRContext *ctx, linalg::LinalgDialect *dialect) { |
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| 57 | IndexOp::attachInterface<IndexOpInterface>(*ctx); |
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| 58 | // Note: ValueBoundsOpInterface implementation is not required for ops that |
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| 59 | // implement `DestinationStyleOpInterface` (for querying shaped OpResults). |
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| 60 | }); |
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| 61 | } |
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| 62 | |
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