Simplify address pool index assignment.

llvm-svn: 206905
diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index 63f510d..7f1beba 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -257,9 +257,7 @@
 
 unsigned DwarfFile::getAddrPoolIndex(const MCSymbol *Sym, bool TLS) {
   std::pair<AddrPool::iterator, bool> P = AddressPool.insert(
-      std::make_pair(Sym, AddressPoolEntry(NextAddrPoolNumber, TLS)));
-  if (P.second)
-    ++NextAddrPoolNumber;
+      std::make_pair(Sym, AddressPoolEntry(AddressPool.size(), TLS)));
   return P.first->second.Number;
 }