aa8499863a
Introduces a dataflow analysis for tracking offset, size, and stride
ranges of operations.
Inference of the metadata is accomplished through the implementation of
the interface
`InferStridedMetadataOpInterface`.
To keep the size of the patch small, this patch only implements the
interface for the
`memref.subview` operation. It's future work to add more operations.
Example:
```mlir
func.func @memref_subview(%arg0: memref<8x16x4xf32, strided<[64, 4, 1]>>) {
%c0 = arith.constant 0 : index
%c1 = arith.constant 1 : index
%c2 = arith.constant 2 : index
%0 = test.with_bounds {smax = 13 : index, smin = 11 : index, umax = 13 : index, umin = 11 : index} : index
%1 = test.with_bounds {smax = 7 : index, smin = 5 : index, umax = 7 : index, umin = 5 : index} : index
%subview = memref.subview %arg0[%c0, %c0, %c1] [%1, %0, %c2] [%c1, %c1, %c1] : memref<8x16x4xf32, strided<[64, 4, 1]>> to memref<?x?x?xf32, strided<[?, ?, ?], offset: ?>>
return
}
```
Applying `mlir-opt --test-strided-metadata-range-analysis` prints:
```
Op: %subview = memref.subview %arg0[%c0, %c0, %c1] [%1, %0, %c2] [%c1, %c1, %c1] : memref<8x16x4xf32, strided<[64, 4, 1]>> to memref<?x?x?xf32, strided<[?, ?, ?], offset: ?>>
result[0]: strided_metadata<offset = [{unsigned : [1, 1] signed : [1, 1]}], sizes = [{unsigned : [5, 7] signed : [5, 7]}, {unsigned : [11, 13] signed : [11, 13]}, {unsigned : [2, 2] signed : [2, 2]}], strides = [{unsigned : [64, 64] signed : [64, 64]}, {unsigned : [4, 4] signed : [4, 4]}, {unsigned : [1, 1] signed : [1, 1]}]>
```
---------
Signed-off-by: Fabian Mora <fabian.mora-cordero@amd.com>
37 lines
1.2 KiB
C++
37 lines
1.2 KiB
C++
//===- InferStridedMetadataInterface.cpp - Strided md inference interface -===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "mlir/Interfaces/InferStridedMetadataInterface.h"
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#include "mlir/IR/BuiltinTypes.h"
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#include "mlir/IR/TypeUtilities.h"
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#include <optional>
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using namespace mlir;
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#include "mlir/Interfaces/InferStridedMetadataInterface.cpp.inc"
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void StridedMetadataRange::print(raw_ostream &os) const {
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if (isUninitialized()) {
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os << "strided_metadata<None>";
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return;
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}
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os << "strided_metadata<offset = [";
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llvm::interleaveComma(*offsets, os, [&](const ConstantIntRanges &range) {
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os << "{" << range << "}";
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});
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os << "], sizes = [";
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llvm::interleaveComma(sizes, os, [&](const ConstantIntRanges &range) {
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os << "{" << range << "}";
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});
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os << "], strides = [";
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llvm::interleaveComma(strides, os, [&](const ConstantIntRanges &range) {
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os << "{" << range << "}";
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});
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os << "]>";
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}
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