|
| 1 | +//===- LayoutTest.cpp - unit tests related to memref layout ---------------===// |
| 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 "mlir/Dialect/MemRef/IR/MemRef.h" |
| 10 | +#include "mlir/IR/AffineMap.h" |
| 11 | +#include "mlir/IR/Builders.h" |
| 12 | +#include "mlir/IR/BuiltinTypes.h" |
| 13 | +#include "gtest/gtest.h" |
| 14 | + |
| 15 | +using namespace mlir; |
| 16 | +using namespace mlir::memref; |
| 17 | + |
| 18 | +// |
| 19 | +// Test the correctness of `memref::getNumContiguousTrailingDims` |
| 20 | +// |
| 21 | +TEST(MemRefLayout, numContigDim) { |
| 22 | + MLIRContext ctx; |
| 23 | + OpBuilder b(&ctx); |
| 24 | + |
| 25 | + const int64_t _ = ShapedType::kDynamic; |
| 26 | + const FloatType f32 = b.getF32Type(); |
| 27 | + auto strided = [&ctx](ArrayRef<int64_t> s) { |
| 28 | + return StridedLayoutAttr::get(&ctx, 0, s); |
| 29 | + }; |
| 30 | + |
| 31 | + // Special case for identity maps and no explicit `strided` attribute - the |
| 32 | + // memref is entirely contiguous even if the strides cannot be determined |
| 33 | + // statically. |
| 34 | + |
| 35 | + // memref<?x?x?xf32> |
| 36 | + auto m0 = MemRefType::get({_, _, _}, f32); |
| 37 | + EXPECT_EQ(m0.getNumContiguousTrailingDims(), 3); |
| 38 | + |
| 39 | + // Conservatively assume memref is sparse everywhere if cannot get the |
| 40 | + // strides. |
| 41 | + |
| 42 | + // memref<2x2x2xf32, (i,j,k)->(i,k,j)> |
| 43 | + auto m1 = MemRefType::get( |
| 44 | + {2, 2, 2}, f32, |
| 45 | + AffineMap::getPermutationMap(ArrayRef<int64_t>{0, 2, 1}, &ctx)); |
| 46 | + EXPECT_EQ(m1.getNumContiguousTrailingDims(), 0); |
| 47 | + |
| 48 | + // A base cases of a fixed memref with the usual strides. |
| 49 | + |
| 50 | + // memref<2x2x2xf32, strided<[4, 2, 1]>> |
| 51 | + auto m3 = MemRefType::get({2, 2, 2}, f32, strided({4, 2, 1})); |
| 52 | + EXPECT_EQ(m3.getNumContiguousTrailingDims(), 3); |
| 53 | + |
| 54 | + // A fixed memref with a discontinuity in the rightmost dimension. |
| 55 | + |
| 56 | + // memref<2x2x2xf32, strided<[8, 4, 2]>> |
| 57 | + auto m4 = MemRefType::get({2, 2, 2}, f32, strided({8, 4, 2})); |
| 58 | + EXPECT_EQ(m4.getNumContiguousTrailingDims(), 0); |
| 59 | + |
| 60 | + // A fixed memref with a discontinuity in the "middle". |
| 61 | + |
| 62 | + // memref<2x2x2xf32, strided<[8, 2, 1]>> |
| 63 | + auto m5 = MemRefType::get({2, 2, 2}, f32, strided({8, 2, 1})); |
| 64 | + EXPECT_EQ(m5.getNumContiguousTrailingDims(), 2); |
| 65 | + |
| 66 | + // A dynamic memref where the dynamic dimension breaks continuity. |
| 67 | + |
| 68 | + // memref<2x?x2xf32, strided<[4, 2, 1]>> |
| 69 | + auto m6 = MemRefType::get({2, _, 2}, f32, strided({4, 2, 1})); |
| 70 | + EXPECT_EQ(m6.getNumContiguousTrailingDims(), 2); |
| 71 | + |
| 72 | + // A edge case of a dynamic memref where the dynamic dimension is the first |
| 73 | + // one. |
| 74 | + |
| 75 | + // memref<?x2x2xf32, strided<[4, 2, 1]>> |
| 76 | + auto m7 = MemRefType::get({2, _, 2}, f32, strided({4, 2, 1})); |
| 77 | + EXPECT_EQ(m7.getNumContiguousTrailingDims(), 2); |
| 78 | + |
| 79 | + // A memref with a unit dimension. Unit dimensions do not affect continuity, |
| 80 | + // even if the corresponding stride is dynamic. |
| 81 | + |
| 82 | + // memref<2x1x2xf32, strided<[2,?,1]>> |
| 83 | + auto m8 = MemRefType::get({2, 1, 2}, f32, strided({2, _, 1})); |
| 84 | + EXPECT_EQ(m8.getNumContiguousTrailingDims(), 3); |
| 85 | +} |
| 86 | + |
| 87 | +// |
| 88 | +// Test the member function `memref::areTrailingDimsContiguous` |
| 89 | +// |
| 90 | +TEST(MemRefLayout, contigTrailingDim) { |
| 91 | + MLIRContext ctx; |
| 92 | + OpBuilder b(&ctx); |
| 93 | + |
| 94 | + const int64_t _ = ShapedType::kDynamic; |
| 95 | + const FloatType f32 = b.getF32Type(); |
| 96 | + auto strided = [&ctx](ArrayRef<int64_t> s) { |
| 97 | + return StridedLayoutAttr::get(&ctx, 0, s); |
| 98 | + }; |
| 99 | + |
| 100 | + // A not-entirely-continuous, not-entirely-discontinuous memref. |
| 101 | + // ensure `areTrailingDimsContiguous` returns `true` for the value |
| 102 | + // returned by `getNumContiguousTrailingDims` and `false` for the next bigger |
| 103 | + // number. |
| 104 | + |
| 105 | + // memref<2x?x2xf32, strided<[?,2,1]>> |
| 106 | + auto m = MemRefType::get({2, _, 2}, f32, strided({_, 2, 1})); |
| 107 | + int64_t n = m.getNumContiguousTrailingDims(); |
| 108 | + EXPECT_TRUE(m.areTrailingDimsContiguous(n)); |
| 109 | + ASSERT_TRUE(n + 1 <= m.getRank()); |
| 110 | + EXPECT_FALSE(m.areTrailingDimsContiguous(n + 1)); |
| 111 | +} |
0 commit comments