1 | //===- SparseTensorDescriptor.cpp -----------------------------------------===// |
2 | // |
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
4 | // See https://llvm.org/LICENSE.txt for license information. |
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
6 | // |
7 | //===----------------------------------------------------------------------===// |
8 | |
9 | #include "SparseTensorDescriptor.h" |
10 | #include "CodegenUtils.h" |
11 | |
12 | #include "mlir/Dialect/LLVMIR/LLVMDialect.h" |
13 | #include "mlir/Dialect/MemRef/IR/MemRef.h" |
14 | #include "mlir/Dialect/SparseTensor/IR/SparseTensor.h" |
15 | #include "mlir/Dialect/SparseTensor/Transforms/Passes.h" |
16 | #include "mlir/Transforms/DialectConversion.h" |
17 | |
18 | using namespace mlir; |
19 | using namespace sparse_tensor; |
20 | |
21 | //===----------------------------------------------------------------------===// |
22 | // Private helper methods. |
23 | //===----------------------------------------------------------------------===// |
24 | |
25 | /// Constructs a nullable `LevelAttr` from the `std::optional<Level>`. |
26 | static IntegerAttr optionalLevelAttr(MLIRContext *ctx, |
27 | std::optional<Level> lvl) { |
28 | return lvl ? IntegerAttr::get(IndexType::get(ctx), lvl.value()) |
29 | : IntegerAttr(); |
30 | } |
31 | |
32 | // This is only ever called from `SparseTensorTypeToBufferConverter`, |
33 | // which is why the first argument is `RankedTensorType` rather than |
34 | // `SparseTensorType`. |
35 | static std::optional<LogicalResult> |
36 | convertSparseTensorType(RankedTensorType rtp, SmallVectorImpl<Type> &fields) { |
37 | const SparseTensorType stt(rtp); |
38 | if (!stt.hasEncoding()) |
39 | return std::nullopt; |
40 | |
41 | unsigned numFields = fields.size(); |
42 | (void)numFields; |
43 | foreachFieldAndTypeInSparseTensor( |
44 | stt, |
45 | [&](Type fieldType, FieldIndex fieldIdx, |
46 | SparseTensorFieldKind /*fieldKind*/, Level /*lvl*/, |
47 | LevelType /*lt*/) -> bool { |
48 | assert(numFields + fieldIdx == fields.size()); |
49 | fields.push_back(Elt: fieldType); |
50 | return true; |
51 | }); |
52 | return success(); |
53 | } |
54 | |
55 | //===----------------------------------------------------------------------===// |
56 | // The sparse tensor type converter (defined in Passes.h). |
57 | //===----------------------------------------------------------------------===// |
58 | |
59 | static Value materializeTuple(OpBuilder &builder, RankedTensorType tp, |
60 | ValueRange inputs, Location loc) { |
61 | if (!getSparseTensorEncoding(tp)) |
62 | // Not a sparse tensor. |
63 | return Value(); |
64 | // Sparsifier knows how to cancel out these casts. |
65 | return genTuple(builder, loc, tp, inputs); |
66 | } |
67 | |
68 | SparseTensorTypeToBufferConverter::SparseTensorTypeToBufferConverter() { |
69 | addConversion(callback: [](Type type) { return type; }); |
70 | addConversion(callback&: convertSparseTensorType); |
71 | |
72 | // Required by scf.for 1:N type conversion. |
73 | addSourceMaterialization(callback&: materializeTuple); |
74 | } |
75 | |
76 | //===----------------------------------------------------------------------===// |
77 | // StorageTensorSpecifier methods. |
78 | //===----------------------------------------------------------------------===// |
79 | |
80 | Value SparseTensorSpecifier::getInitValue(OpBuilder &builder, Location loc, |
81 | SparseTensorType stt) { |
82 | return builder.create<StorageSpecifierInitOp>( |
83 | loc, StorageSpecifierType::get(stt.getEncoding())); |
84 | } |
85 | |
86 | Value SparseTensorSpecifier::getSpecifierField(OpBuilder &builder, Location loc, |
87 | StorageSpecifierKind kind, |
88 | std::optional<Level> lvl) { |
89 | return builder.create<GetStorageSpecifierOp>( |
90 | loc, specifier, kind, optionalLevelAttr(specifier.getContext(), lvl)); |
91 | } |
92 | |
93 | void SparseTensorSpecifier::setSpecifierField(OpBuilder &builder, Location loc, |
94 | Value v, |
95 | StorageSpecifierKind kind, |
96 | std::optional<Level> lvl) { |
97 | // TODO: make `v` have type `TypedValue<IndexType>` instead. |
98 | assert(v.getType().isIndex()); |
99 | specifier = builder.create<SetStorageSpecifierOp>( |
100 | loc, specifier, kind, optionalLevelAttr(specifier.getContext(), lvl), v); |
101 | } |
102 | |
103 | //===----------------------------------------------------------------------===// |
104 | // SparseTensorDescriptor methods. |
105 | //===----------------------------------------------------------------------===// |
106 | |
107 | Value sparse_tensor::SparseTensorDescriptor::getCrdMemRefOrView( |
108 | OpBuilder &builder, Location loc, Level lvl) const { |
109 | const Level cooStart = rType.getAoSCOOStart(); |
110 | if (lvl < cooStart) |
111 | return getMemRefField(SparseTensorFieldKind::CrdMemRef, lvl); |
112 | |
113 | Value stride = constantIndex(builder, loc, rType.getLvlRank() - cooStart); |
114 | Value size = getCrdMemSize(builder, loc, cooStart); |
115 | size = builder.create<arith::DivUIOp>(loc, size, stride); |
116 | return builder.create<memref::SubViewOp>( |
117 | loc, getMemRefField(SparseTensorFieldKind::CrdMemRef, cooStart), |
118 | /*offset=*/ValueRange{constantIndex(builder, loc, lvl - cooStart)}, |
119 | /*size=*/ValueRange{size}, |
120 | /*step=*/ValueRange{stride}); |
121 | } |
122 | |