MLIR  21.0.0git
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 
14 #include "mlir/IR/BuiltinTypes.h"
20 #include <optional>
21 
22 using namespace mlir;
23 using namespace mlir::memref;
24 
25 #include "mlir/Dialect/MemRef/IR/MemRefOpsDialect.cpp.inc"
26 
27 //===----------------------------------------------------------------------===//
28 // MemRefDialect Dialect Interfaces
29 //===----------------------------------------------------------------------===//
30 
31 namespace {
32 struct MemRefInlinerInterface : public DialectInlinerInterface {
34  bool isLegalToInline(Region *dest, Region *src, bool wouldBeCloned,
35  IRMapping &valueMapping) const final {
36  return true;
37  }
38  bool isLegalToInline(Operation *, Region *, bool wouldBeCloned,
39  IRMapping &) const final {
40  return true;
41  }
42 };
43 } // namespace
44 
45 void mlir::memref::MemRefDialect::initialize() {
46  addOperations<
47 #define GET_OP_LIST
48 #include "mlir/Dialect/MemRef/IR/MemRefOps.cpp.inc"
49  >();
50  addInterfaces<MemRefInlinerInterface>();
51  declarePromisedInterface<ConvertToEmitCPatternInterface, MemRefDialect>();
52  declarePromisedInterface<ConvertToLLVMPatternInterface, MemRefDialect>();
53  declarePromisedInterfaces<bufferization::AllocationOpInterface, AllocOp,
54  AllocaOp, ReallocOp>();
55  declarePromisedInterfaces<RuntimeVerifiableOpInterface, CastOp, ExpandShapeOp,
56  LoadOp, ReinterpretCastOp, StoreOp, SubViewOp>();
57  declarePromisedInterfaces<ValueBoundsOpInterface, AllocOp, AllocaOp, CastOp,
58  DimOp, GetGlobalOp, RankOp, SubViewOp>();
59  declarePromisedInterface<DestructurableTypeInterface, MemRefType>();
60 }
61 
62 /// Finds the unique dealloc operation (if one exists) for `allocValue`.
63 std::optional<Operation *> mlir::memref::findDealloc(Value allocValue) {
64  Operation *dealloc = nullptr;
65  for (Operation *user : allocValue.getUsers()) {
66  if (!hasEffect<MemoryEffects::Free>(user, allocValue))
67  continue;
68  // If we found a realloc instead of dealloc, return std::nullopt.
69  if (isa<memref::ReallocOp>(user))
70  return std::nullopt;
71  // If we found > 1 dealloc, return std::nullopt.
72  if (dealloc)
73  return std::nullopt;
74  dealloc = user;
75  }
76  return dealloc;
77 }
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:204
std::optional< Operation * > findDealloc(Value allocValue)
Finds a single dealloc operation for the given allocated value.
Include the generated interface declarations.