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//===- LoopAnnotationTranslation.h ------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file implements the translation between an MLIR loop annotations and
// the corresponding LLVMIR metadata representation.
//
//===----------------------------------------------------------------------===//
#ifndef MLIR_LIB_TARGET_LLVMIR_LOOPANNOTATIONTRANSLATION_H_
#define MLIR_LIB_TARGET_LLVMIR_LOOPANNOTATIONTRANSLATION_H_
#include "mlir/Dialect/LLVMIR/LLVMDialect.h"
#include "mlir/Target/LLVMIR/ModuleTranslation.h"
namespace mlir {
namespace LLVM {
namespace detail {
/// A helper class that converts LoopAnnotationAttrs and AccessGroupAttrs into
/// corresponding llvm::MDNodes.
class LoopAnnotationTranslation {
public:
LoopAnnotationTranslation(ModuleTranslation &moduleTranslation,
llvm::Module &llvmModule)
: moduleTranslation(moduleTranslation), llvmModule(llvmModule) {}
llvm::MDNode *translateLoopAnnotation(LoopAnnotationAttr attr, Operation *op);
/// Returns the LLVM metadata corresponding to an mlir LLVM dialect access
/// group attribute.
llvm::MDNode *getAccessGroup(AccessGroupAttr accessGroupAttr);
/// Returns the LLVM metadata corresponding to the access group attribute
/// referenced by the AccessGroupOpInterface or null if there are none.
llvm::MDNode *getAccessGroups(AccessGroupOpInterface op);
/// The ModuleTranslation owning this instance.
ModuleTranslation &moduleTranslation;
private:
/// Returns the LLVM metadata corresponding to a llvm loop metadata attribute.
llvm::MDNode *lookupLoopMetadata(Attribute options) const {
return loopMetadataMapping.lookup(options);
}
void mapLoopMetadata(Attribute options, llvm::MDNode *metadata) {
auto result = loopMetadataMapping.try_emplace(options, metadata);
(void)result;
assert(result.second &&
"attempting to map loop options that was already mapped");
}
/// Mapping from an attribute describing loop metadata to its LLVM metadata.
/// The metadata is attached to Latch block branches with this attribute.
DenseMap<Attribute, llvm::MDNode *> loopMetadataMapping;
/// Mapping from an access group attribute to its LLVM metadata.
/// This map is populated on module entry and is used to annotate loops (as
/// identified via their branches) and contained memory accesses.
DenseMap<AccessGroupAttr, llvm::MDNode *> accessGroupMetadataMapping;
llvm::Module &llvmModule;
};
} // namespace detail
} // namespace LLVM
} // namespace mlir
#endif // MLIR_LIB_TARGET_LLVMIR_LOOPANNOTATIONTRANSLATION_H_
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