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DIBuilder: retain a type when created with a unique identifier.

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createClassType, createStructType, createUnionType, createEnumerationType,
and createForwardDecl will retain a type when created with a unique identifier,
to make sure they are treated as used even when all uses are replaced with
the identifiers.

Use TrackingVH<MDNode> instead of MDNode in AllRetainTypes, since the created
node can later be updated.

The change will be tested when clients of DIBuilder start to pass in non-empty
unique identifier.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189621 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Manman Ren
2013-08-29 23:17:54 +00:00
parent 88acef0b8e
commit 3a0e9b50f3
2 changed files with 27 additions and 4 deletions
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5
include/llvm/DIBuilder.h
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@ -18,6 +18,7 @@
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/DataTypes.h"
#include "llvm/Support/ValueHandle.h"
namespace llvm {
class BasicBlock;
@ -65,7 +66,9 @@ namespace llvm {
Function *ValueFn; // llvm.dbg.value
SmallVector<Value *, 4> AllEnumTypes;
SmallVector<Value *, 4> AllRetainTypes;
/// Use TrackingVH to collect RetainTypes, since they can be updated
/// later on.
SmallVector<TrackingVH<MDNode>, 4> AllRetainTypes;
SmallVector<Value *, 4> AllSubprograms;
SmallVector<Value *, 4> AllGVs;
SmallVector<Value *, 4> AllImportedModules;