http://llvm.org/bugs/show_bug.cgi?id=9499
Summary: Bug with FastFoldingSetNode / FoldingSetNodeID::Add
Product: libraries
Version: trunk
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P
Component: Support Libraries
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
There's a problem with interaction of those two functions.
FoldingSetNodeID::Add is supposed to add data to a folding set node ID.
However, when we add folding set node that derives from FastFoldingSetNode, its
profile function will overwrite anything that has been added previously to the
folding set node ID:
// FoldingSetNodeID::Add
template <typename T>
inline void Add(const T& x) { FoldingSetTrait<T>::Profile(x, *this); }
// FastFoldingSetNode::Profile
void Profile(FoldingSetNodeID& ID) const { ID = FastID; }
I think that FoldingSetNodeID::Add should let the Profile function add stuff to
a temporary folding set node id and then append all collected data to "*this".
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