6bf043e743
This commit removes the deallocation capabilities of one-shot-bufferization. One-shot-bufferization should never deallocate any memrefs as this should be entirely handled by the ownership-based-buffer-deallocation pass going forward. This means the `allow-return-allocs` pass option will default to true now, `create-deallocs` defaults to false and they, as well as the escape attribute indicating whether a memref escapes the current region, will be removed. A new `allow-return-allocs-from-loops` option is added as a temporary workaround for some bufferization limitations.
112 lines
4.6 KiB
C++
112 lines
4.6 KiB
C++
//===----------------------------------------------------------------------===//
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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/Dialect/Affine/IR/AffineOps.h"
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#include "mlir/Dialect/Bufferization/IR/BufferizableOpInterface.h"
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#include "mlir/Dialect/Bufferization/IR/Bufferization.h"
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#include "mlir/Dialect/MemRef/IR/MemRef.h"
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#include "mlir/Dialect/Tensor/IR/Tensor.h"
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#include "mlir/Interfaces/FunctionInterfaces.h"
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#include "mlir/Transforms/InliningUtils.h"
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using namespace mlir;
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using namespace mlir::bufferization;
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#include "mlir/Dialect/Bufferization/IR/BufferizationOpsDialect.cpp.inc"
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/// Attribute name used to mark function arguments who's buffers can be written
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/// to during One-Shot Module Bufferize.
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constexpr const ::llvm::StringLiteral BufferizationDialect::kWritableAttrName;
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/// Attribute name used to mark the bufferization layout for region arguments
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/// during One-Shot Module Bufferize.
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constexpr const ::llvm::StringLiteral
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BufferizationDialect::kBufferLayoutAttrName;
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//===----------------------------------------------------------------------===//
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// Bufferization Dialect Interfaces
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//===----------------------------------------------------------------------===//
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namespace {
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struct BufferizationInlinerInterface : public DialectInlinerInterface {
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using DialectInlinerInterface::DialectInlinerInterface;
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/// Operations in Bufferization dialect are always legal to inline.
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bool isLegalToInline(Operation *, Region *, bool, IRMapping &) const final {
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return true;
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}
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};
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} // namespace
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//===----------------------------------------------------------------------===//
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// Bufferization Dialect
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//===----------------------------------------------------------------------===//
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void mlir::bufferization::BufferizationDialect::initialize() {
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addOperations<
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#define GET_OP_LIST
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#include "mlir/Dialect/Bufferization/IR/BufferizationOps.cpp.inc"
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>();
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addInterfaces<BufferizationInlinerInterface>();
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}
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LogicalResult BufferizationDialect::verifyRegionArgAttribute(
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Operation *op, unsigned /*regionIndex*/, unsigned argIndex,
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NamedAttribute attr) {
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if (attr.getName() == kWritableAttrName) {
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if (!llvm::isa<BoolAttr>(attr.getValue())) {
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return op->emitError() << "'" << kWritableAttrName
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<< "' is expected to be a boolean attribute";
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}
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if (!isa<FunctionOpInterface>(op))
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return op->emitError() << "expected '" << kWritableAttrName
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<< "' to be used on function-like operations";
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if (cast<FunctionOpInterface>(op).isExternal())
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return op->emitError() << "'" << kWritableAttrName
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<< "' is invalid on external functions";
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return success();
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}
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if (attr.getName() == kBufferAccessAttrName) {
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if (!llvm::isa<StringAttr>(attr.getValue())) {
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return op->emitError() << "'" << kBufferAccessAttrName
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<< "' is expected to be a string attribute";
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}
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StringRef str = llvm::cast<StringAttr>(attr.getValue()).getValue();
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if (str != "none" && str != "read" && str != "write" && str != "read-write")
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return op->emitError()
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<< "invalid value for '" << kBufferAccessAttrName << "'";
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if (!isa<FunctionOpInterface>(op))
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return op->emitError() << "expected '" << kBufferAccessAttrName
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<< "' to be used on function-like operations";
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return success();
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}
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if (attr.getName() == kBufferLayoutAttrName) {
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if (!llvm::isa<AffineMapAttr>(attr.getValue())) {
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return op->emitError() << "'" << kBufferLayoutAttrName
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<< "' is expected to be a affine map attribute";
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}
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if (!isa<FunctionOpInterface>(op))
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return op->emitError() << "expected '" << kBufferLayoutAttrName
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<< "' to be used on function-like operations";
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return success();
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}
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return op->emitError() << "attribute '" << kBufferLayoutAttrName
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<< "' not supported as a region arg attribute by the "
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"bufferization dialect";
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}
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LogicalResult
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BufferizationDialect::verifyOperationAttribute(Operation *op,
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NamedAttribute attr) {
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using bufferization::BufferizableOpInterface;
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return op->emitError()
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<< "attribute '" << attr.getName()
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<< "' not supported as an op attribute by the bufferization dialect";
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}
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