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Add an MDBuilder utility for creating !tbaa.struct nodes.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164425 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2012-09-21 23:00:37 +00:00
parent 0543c147df
commit c912494855
1 changed files with 21 additions and 0 deletions
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21
include/llvm/MDBuilder.h
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@ -134,6 +134,27 @@ namespace llvm {
}
}
struct TBAAStructField {
uint64_t Offset;
uint64_t Size;
MDNode *TBAA;
TBAAStructField(uint64_t Offset, uint64_t Size, MDNode *TBAA) :
Offset(Offset), Size(Size), TBAA(TBAA) {}
};
/// \brief Return metadata for a tbaa.struct node with the given
/// struct field descriptions.
MDNode *createTBAAStructNode(ArrayRef<TBAAStructField> Fields) {
SmallVector<Value *, 4> Vals(Fields.size() * 3);
Type *Int64 = IntegerType::get(Context, 64);
for (unsigned i = 0, e = Fields.size(); i != e; ++i) {
Vals[i * 3 + 0] = ConstantInt::get(Int64, Fields[i].Offset);
Vals[i * 3 + 1] = ConstantInt::get(Int64, Fields[i].Size);
Vals[i * 3 + 2] = Fields[i].TBAA;
}
return MDNode::get(Context, Vals);
}
};
} // end namespace llvm