0fc8d9e41a
This revision removes the metadata op, that to the best of our knowledge, has no more uses after switching to a purely attribute based metadata representation: https://reviews.llvm.org/D155444 https://reviews.llvm.org/D155285 https://reviews.llvm.org/D155159 These changes got unlocked after landing distinct attribute support: https://reviews.llvm.org/D153360, which enables modeling distinct metadata using attributes. As a result, all metadata kinds are now represented using attributes. Previously, there has been a mix of attribute and op based representations. Having attribute only metadata makes it possible to update the metadata in-parallel, while updating the global metadata operation has been a sequential process. The LLVM Dialect inliner already benefits from this change and now creates new alias scopes and domains during inlining rather than dropping the no alias information: https://reviews.llvm.org/D155712 Reviewed By: Dinistro Differential Revision: https://reviews.llvm.org/D156217
73 lines
2.8 KiB
C++
73 lines
2.8 KiB
C++
//===- LoopAnnotationImporter.h ---------------------------------*- 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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//
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// This file implements the translation between LLVMIR loop metadata and the
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// corresponding MLIR representation.
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//
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//===----------------------------------------------------------------------===//
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#ifndef MLIR_LIB_TARGET_LLVMIR_LOOPANNOTATIONIMPORTER_H_
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#define MLIR_LIB_TARGET_LLVMIR_LOOPANNOTATIONIMPORTER_H_
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#include "mlir/Dialect/LLVMIR/LLVMDialect.h"
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#include "mlir/Target/LLVMIR/ModuleImport.h"
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namespace mlir {
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namespace LLVM {
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namespace detail {
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/// A helper class that converts llvm.loop metadata nodes into corresponding
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/// LoopAnnotationAttrs and llvm.access.group nodes into AccessGroupAttrs.
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class LoopAnnotationImporter {
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public:
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LoopAnnotationImporter(ModuleImport &moduleImport, OpBuilder &builder)
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: moduleImport(moduleImport), builder(builder) {}
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LoopAnnotationAttr translateLoopAnnotation(const llvm::MDNode *node,
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Location loc);
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/// Converts all LLVM access groups starting from node to MLIR access group
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/// attributes. It stores a mapping from every nested access group node to the
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/// translated attribute. Returns success if all conversions succeed and
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/// failure otherwise.
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LogicalResult translateAccessGroup(const llvm::MDNode *node, Location loc);
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/// Returns the access group attribute that map to the access group nodes
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/// starting from the access group metadata node. Returns failure, if any of
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/// the attributes cannot be found.
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FailureOr<SmallVector<AccessGroupAttr>>
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lookupAccessGroupAttrs(const llvm::MDNode *node) const;
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/// The ModuleImport owning this instance.
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ModuleImport &moduleImport;
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private:
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/// Returns the LLVM metadata corresponding to a llvm loop metadata attribute.
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LoopAnnotationAttr lookupLoopMetadata(const llvm::MDNode *node) const {
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return loopMetadataMapping.lookup(node);
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}
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void mapLoopMetadata(const llvm::MDNode *metadata, LoopAnnotationAttr attr) {
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auto result = loopMetadataMapping.try_emplace(metadata, attr);
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(void)result;
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assert(result.second &&
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"attempting to map loop options that was already mapped");
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}
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OpBuilder &builder;
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DenseMap<const llvm::MDNode *, LoopAnnotationAttr> loopMetadataMapping;
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/// Mapping between original LLVM access group metadata nodes and the imported
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/// MLIR access group attributes.
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DenseMap<const llvm::MDNode *, AccessGroupAttr> accessGroupMapping;
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};
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} // namespace detail
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} // namespace LLVM
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} // namespace mlir
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#endif // MLIR_LIB_TARGET_LLVMIR_LOOPANNOTATIONIMPORTER_H_
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