[IndVars] Factor out a helper function for readability [NFC]
[IndVars] Factor out a helper function for readability [NFC]



git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@375133 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/llvm,llvm-mirror/llvm,llvm-mirror/llvm,llvm-mirror/llvm,llvm-mirror/llvm,llvm-mirror/llvm,llvm-mirror/llvm,llvm-mirror/llvm,llvm-mirror/llvm