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

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Based on code review by Eric Christopher on r207323

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207460 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Blaikie 2014-04-28 22:52:50 +00:00
parent 2f9c1f2f17
commit 4fc8298f17
1 changed files with 5 additions and 0 deletions

5
lib/CodeGen/AsmPrinter/AddressPool.h

@ -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: