As pointed out by Duncan, I accidentally dropped the first MemoryFence of the
authorOwen Anderson <resistor@mac.com>
Thu, 18 Jun 2009 16:08:27 +0000 (16:08 +0000)
committerOwen Anderson <resistor@mac.com>
Thu, 18 Jun 2009 16:08:27 +0000 (16:08 +0000)
commit3cfc62aa08c671c4f7fccd21e1ff1af2b07d34b6
treeaedf684835da54b2cdcca52b543451fc38b798d2
parentfd0cfe4bb4782d2b525495dae5096d3709d888c6
As pointed out by Duncan, I accidentally dropped the first MemoryFence of the
double-checked locking pattern here.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73701 91177308-0d34-0410-b5e6-96231b3b80d8
lib/VMCore/Pass.cpp