87a0479538
This commit moves the access group translation into the LoopAnnotationTranslation class as these two metadata kinds only appear together. Drops the access group cleanup from `ModuleTranslation::forgetMapping` as this is only used on function regions. Access groups only appear in the region of a global metadata operation and will thus not be cleaned here. Analogous to https://reviews.llvm.org/D143577 Reviewed By: gysit Differential Revision: https://reviews.llvm.org/D144253
78 lines
3.0 KiB
C++
78 lines
3.0 KiB
C++
//===- LoopAnnotationTranslation.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 an MLIR loop annotations and
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// the corresponding LLVMIR metadata representation.
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//
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//===----------------------------------------------------------------------===//
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#ifndef MLIR_LIB_TARGET_LLVMIR_LOOPANNOTATIONTRANSLATION_H_
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#define MLIR_LIB_TARGET_LLVMIR_LOOPANNOTATIONTRANSLATION_H_
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#include "mlir/Dialect/LLVMIR/LLVMDialect.h"
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#include "mlir/Target/LLVMIR/ModuleTranslation.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 LoopAnnotationAttrs and AccessGroupMetadataOps
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/// into a corresponding llvm::MDNodes.
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class LoopAnnotationTranslation {
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public:
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LoopAnnotationTranslation(Operation *mlirModule, llvm::Module &llvmModule)
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: mlirModule(mlirModule), llvmModule(llvmModule) {}
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llvm::MDNode *translateLoopAnnotation(LoopAnnotationAttr attr, Operation *op);
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/// Traverses the global access group metadata operation in the `mlirModule`
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/// and creates corresponding LLVM metadata nodes.
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LogicalResult createAccessGroupMetadata();
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/// Returns the LLVM metadata corresponding to a symbol reference to an mlir
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/// LLVM dialect access group operation.
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llvm::MDNode *getAccessGroup(Operation *op,
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SymbolRefAttr accessGroupRef) const;
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/// Returns the LLVM metadata corresponding to a list of symbol reference to
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/// an mlir LLVM dialect access group operation. Returns nullptr if
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/// `accessGroupRefs` is null or empty.
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llvm::MDNode *getAccessGroups(Operation *op, ArrayAttr accessGroupRefs) const;
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private:
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/// Returns the LLVM metadata corresponding to a llvm loop metadata attribute.
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llvm::MDNode *lookupLoopMetadata(Attribute options) const {
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return loopMetadataMapping.lookup(options);
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}
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void mapLoopMetadata(Attribute options, llvm::MDNode *metadata) {
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auto result = loopMetadataMapping.try_emplace(options, metadata);
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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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/// Mapping from an attribute describing loop metadata to its LLVM metadata.
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/// The metadata is attached to Latch block branches with this attribute.
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DenseMap<Attribute, llvm::MDNode *> loopMetadataMapping;
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/// Mapping from an access group metadata operation to its LLVM metadata.
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/// This map is populated on module entry and is used to annotate loops (as
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/// identified via their branches) and contained memory accesses.
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DenseMap<Operation *, llvm::MDNode *> accessGroupMetadataMapping;
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Operation *mlirModule;
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llvm::Module &llvmModule;
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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_LOOPANNOTATIONTRANSLATION_H_
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