MLIR  18.0.0git
MemRefDialect.cpp
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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 
13 #include <optional>
14 
15 using namespace mlir;
16 using namespace mlir::memref;
17 
18 #include "mlir/Dialect/MemRef/IR/MemRefOpsDialect.cpp.inc"
19 
20 //===----------------------------------------------------------------------===//
21 // MemRefDialect Dialect Interfaces
22 //===----------------------------------------------------------------------===//
23 
24 namespace {
25 struct MemRefInlinerInterface : public DialectInlinerInterface {
27  bool isLegalToInline(Region *dest, Region *src, bool wouldBeCloned,
28  IRMapping &valueMapping) const final {
29  return true;
30  }
31  bool isLegalToInline(Operation *, Region *, bool wouldBeCloned,
32  IRMapping &) const final {
33  return true;
34  }
35 };
36 } // namespace
37 
38 void mlir::memref::MemRefDialect::initialize() {
39  addOperations<
40 #define GET_OP_LIST
41 #include "mlir/Dialect/MemRef/IR/MemRefOps.cpp.inc"
42  >();
43  addInterfaces<MemRefInlinerInterface>();
44 }
45 
46 /// Finds the unique dealloc operation (if one exists) for `allocValue`.
47 std::optional<Operation *> mlir::memref::findDealloc(Value allocValue) {
48  Operation *dealloc = nullptr;
49  for (Operation *user : allocValue.getUsers()) {
50  if (!hasEffect<MemoryEffects::Free>(user, allocValue))
51  continue;
52  // If we found a realloc instead of dealloc, return std::nullopt.
53  if (isa<memref::ReallocOp>(user))
54  return std::nullopt;
55  // If we found > 1 dealloc, return std::nullopt.
56  if (dealloc)
57  return std::nullopt;
58  dealloc = user;
59  }
60  return dealloc;
61 }
static bool isLegalToInline(InlinerInterface &interface, Region *src, Region *insertRegion, bool shouldCloneInlinedRegion, IRMapping &valueMapping)
Utility to check that all of the operations within 'src' can be inlined.
This is the interface that must be implemented by the dialects of operations to be inlined.
Definition: InliningUtils.h:44
DialectInlinerInterface(Dialect *dialect)
Definition: InliningUtils.h:46
This is a utility class for mapping one set of IR entities to another.
Definition: IRMapping.h:26
Operation is the basic unit of execution within MLIR.
Definition: Operation.h:88
This class contains a list of basic blocks and a link to the parent operation it is attached to.
Definition: Region.h:26
This class represents an instance of an SSA value in the MLIR system, representing a computable value...
Definition: Value.h:96
user_range getUsers() const
Definition: Value.h:224
std::optional< Operation * > findDealloc(Value allocValue)
Finds a single dealloc operation for the given allocated value.
Include the generated interface declarations.