1 //===----------------------------------------------------------------------===//
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/Arithmetic/IR/Arithmetic.h"
10 #include "mlir/Dialect/MemRef/IR/MemRef.h"
11 #include "mlir/Interfaces/SideEffectInterfaces.h"
12 #include "mlir/Transforms/InliningUtils.h"
13
14 using namespace mlir;
15 using namespace mlir::memref;
16
17 #include "mlir/Dialect/MemRef/IR/MemRefOpsDialect.cpp.inc"
18
19 //===----------------------------------------------------------------------===//
20 // MemRefDialect Dialect Interfaces
21 //===----------------------------------------------------------------------===//
22
23 namespace {
24 struct MemRefInlinerInterface : public DialectInlinerInterface {
25 using DialectInlinerInterface::DialectInlinerInterface;
isLegalToInline__anondebc7da50111::MemRefInlinerInterface26 bool isLegalToInline(Region *dest, Region *src, bool wouldBeCloned,
27 BlockAndValueMapping &valueMapping) const final {
28 return true;
29 }
isLegalToInline__anondebc7da50111::MemRefInlinerInterface30 bool isLegalToInline(Operation *, Region *, bool wouldBeCloned,
31 BlockAndValueMapping &) const final {
32 return true;
33 }
34 };
35 } // namespace
36
initialize()37 void mlir::memref::MemRefDialect::initialize() {
38 addOperations<
39 #define GET_OP_LIST
40 #include "mlir/Dialect/MemRef/IR/MemRefOps.cpp.inc"
41 >();
42 addInterfaces<MemRefInlinerInterface>();
43 }
44
45 /// Finds a single dealloc operation for the given allocated value.
findDealloc(Value allocValue)46 llvm::Optional<Operation *> mlir::memref::findDealloc(Value allocValue) {
47 Operation *dealloc = nullptr;
48 for (Operation *user : allocValue.getUsers()) {
49 auto effectInterface = dyn_cast<MemoryEffectOpInterface>(user);
50 if (!effectInterface)
51 continue;
52 // Try to find a free effect that is applied to one of our values
53 // that will be automatically freed by our pass.
54 SmallVector<MemoryEffects::EffectInstance, 2> effects;
55 effectInterface.getEffectsOnValue(allocValue, effects);
56 const bool isFree =
57 llvm::any_of(effects, [&](MemoryEffects::EffectInstance &it) {
58 return isa<MemoryEffects::Free>(it.getEffect());
59 });
60 if (!isFree)
61 continue;
62 // If we found > 1 dealloc, return None.
63 if (dealloc)
64 return llvm::None;
65 dealloc = user;
66 }
67 return dealloc;
68 }
69