Allow BasicBlockEdge to be used in DenseMap
Allow BasicBlockEdge to be used in DenseMap

Summary: Add a DenseMapInfo specialization for BasicBlockEdge

Reviewers: hfinkel, chandlerc, majnemer

Differential Revision: http://reviews.llvm.org/D22207

git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@275041 91177308-0d34-0410-b5e6-96231b3b80d8

apple/swift-llvm,GPUOpen-Drivers/llvm,llvm-mirror/llvm,apple/swift-llvm,llvm-mirror/llvm,GPUOpen-Drivers/llvm,llvm-mirror/llvm,apple/swift-llvm,GPUOpen-Drivers/llvm,llvm-mirror/llvm,apple/swift-llvm,apple/swift-llvm,llvm-mirror/llvm,GPUOpen-Drivers/llvm,llvm-mirror/llvm,llvm-mirror/llvm,GPUOpen-Drivers/llvm,llvm-mirror/llvm,llvm-mirror/llvm,GPUOpen-Drivers/llvm,apple/swift-llvm,apple/swift-llvm,GPUOpen-Drivers/llvm,GPUOpen-Drivers/llvm,apple/swift-llvm