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llvm-mirror/lib/IR/MetadataImpl.h
Duncan P. N. Exon Smith 87c77233df DI: Disallow uniquable DICompileUnits
Since r241097, `DIBuilder` has only created distinct `DICompileUnit`s.
The backend is liable to start relying on that (if it hasn't already),
so make uniquable `DICompileUnit`s illegal and automatically upgrade old
bitcode.  This is a nice cleanup, since we can remove an unnecessary
`DenseSet` (and the associated uniquing info) from `LLVMContextImpl`.

Almost all the testcases were updated with this script:

    git grep -e '= !DICompileUnit' -l -- test |
    grep -v test/Bitcode |
    xargs sed -i '' -e 's,= !DICompileUnit,= distinct !DICompileUnit,'

I imagine something similar should work for out-of-tree testcases.

llvm-svn: 243885
2015-08-03 17:26:41 +00:00

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1.4 KiB
C++

//===- MetadataImpl.h - Helpers for implementing metadata -----------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file has private helpers for implementing metadata types.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_IR_METADATAIMPL_H
#define LLVM_IR_METADATAIMPL_H
#include "llvm/ADT/DenseSet.h"
#include "llvm/IR/Metadata.h"
namespace llvm {
template <class T, class InfoT>
static T *getUniqued(DenseSet<T *, InfoT> &Store,
const typename InfoT::KeyTy &Key) {
auto I = Store.find_as(Key);
return I == Store.end() ? nullptr : *I;
}
template <class T> T *MDNode::storeImpl(T *N, StorageType Storage) {
switch (Storage) {
case Uniqued:
llvm_unreachable("Cannot unique without a uniquing-store");
case Distinct:
N->storeDistinctInContext();
break;
case Temporary:
break;
}
return N;
}
template <class T, class StoreT>
T *MDNode::storeImpl(T *N, StorageType Storage, StoreT &Store) {
switch (Storage) {
case Uniqued:
Store.insert(N);
break;
case Distinct:
N->storeDistinctInContext();
break;
case Temporary:
break;
}
return N;
}
} // end namespace llvm
#endif