[llvm] r233890 - [ADT] Increment epoch from DenseMap::swap.

[Sanjoy Das]

Author: sanjoy
Date: Wed Apr  1 23:58:12 2015
New Revision: 233890

URL: http://llvm.org/viewvc/llvm-project?rev=233890&view=rev
Log:
[ADT] Increment epoch from DenseMap::swap.

Swapping DenseMap A with DenseMap B invalidates iterators pointing into
both A and B.

Modified:
    llvm/trunk/include/llvm/ADT/DenseMap.h

Modified: llvm/trunk/include/llvm/ADT/DenseMap.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/ADT/DenseMap.h?rev=233890&r1=233889&r2=233890&view=diff
==============================================================================
--- llvm/trunk/include/llvm/ADT/DenseMap.h (original)
+++ llvm/trunk/include/llvm/ADT/DenseMap.h Wed Apr  1 23:58:12 2015
@@ -584,6 +584,8 @@ public:
   }
 
   void swap(DenseMap& RHS) {
+    this->incrementEpoch();
+    RHS.incrementEpoch();
     std::swap(Buckets, RHS.Buckets);
     std::swap(NumEntries, RHS.NumEntries);
     std::swap(NumTombstones, RHS.NumTombstones);