MLIR  20.0.0git
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 "mlir/IR/BuiltinTypes.h"
19 #include <optional>
20 
21 using namespace mlir;
22 using namespace mlir::memref;
23 
24 #include "mlir/Dialect/MemRef/IR/MemRefOpsDialect.cpp.inc"
25 
26 //===----------------------------------------------------------------------===//
27 // MemRefDialect Dialect Interfaces
28 //===----------------------------------------------------------------------===//
29 
30 namespace {
31 struct MemRefInlinerInterface : public DialectInlinerInterface {
33  bool isLegalToInline(Region *dest, Region *src, bool wouldBeCloned,
34  IRMapping &valueMapping) const final {
35  return true;
36  }
37  bool isLegalToInline(Operation *, Region *, bool wouldBeCloned,
38  IRMapping &) const final {
39  return true;
40  }
41 };
42 } // namespace
43 
44 void mlir::memref::MemRefDialect::initialize() {
45  addOperations<
46 #define GET_OP_LIST
47 #include "mlir/Dialect/MemRef/IR/MemRefOps.cpp.inc"
48  >();
49  addInterfaces<MemRefInlinerInterface>();
50  declarePromisedInterface<ConvertToLLVMPatternInterface, MemRefDialect>();
51  declarePromisedInterfaces<bufferization::AllocationOpInterface, AllocOp,
52  AllocaOp, ReallocOp>();
53  declarePromisedInterfaces<RuntimeVerifiableOpInterface, CastOp, ExpandShapeOp,
54  LoadOp, ReinterpretCastOp, StoreOp, SubViewOp>();
55  declarePromisedInterfaces<ValueBoundsOpInterface, AllocOp, AllocaOp, CastOp,
56  DimOp, GetGlobalOp, RankOp, SubViewOp>();
57  declarePromisedInterface<DestructurableTypeInterface, MemRefType>();
58 }
59 
60 /// Finds the unique dealloc operation (if one exists) for `allocValue`.
61 std::optional<Operation *> mlir::memref::findDealloc(Value allocValue) {
62  Operation *dealloc = nullptr;
63  for (Operation *user : allocValue.getUsers()) {
64  if (!hasEffect<MemoryEffects::Free>(user, allocValue))
65  continue;
66  // If we found a realloc instead of dealloc, return std::nullopt.
67  if (isa<memref::ReallocOp>(user))
68  return std::nullopt;
69  // If we found > 1 dealloc, return std::nullopt.
70  if (dealloc)
71  return std::nullopt;
72  dealloc = user;
73  }
74  return dealloc;
75 }
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:228
std::optional< Operation * > findDealloc(Value allocValue)
Finds a single dealloc operation for the given allocated value.
Include the generated interface declarations.