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AddressPool::HasBeenUsed: Add comment explaining the use-case for this flag. 

Based on code review by Eric Christopher on r207323

llvm-svn: 207460
This commit is contained in:
David Blaikie 2014-04-28 22:52:50 +00:00
parent e0d954d51d
commit b2133cb88d
1 changed files with 5 additions and 0 deletions
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5
llvm/lib/CodeGen/AsmPrinter/AddressPool.h
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@ -26,6 +26,11 @@ class AddressPool {
AddressPoolEntry(unsigned Number, bool TLS) : Number(Number), TLS(TLS) {}
};
DenseMap<const MCSymbol *, AddressPoolEntry> Pool;
/// Record whether the AddressPool has been queried for an address index since
/// the last "resetUsedFlag" call. Used to implement type unit fallback - a
/// type that references addresses cannot be placed in a type unit when using
/// fission.
bool HasBeenUsed;
public: