[ThinLTO] Extract getReferencedTypeIds from [NFC]
[ThinLTO] Extract getReferencedTypeIds from [NFC]

Summary: Refactoring before D52201

Reviewers: eugenis, tejohnson

Subscribers: pcc, inglorion, hiraditya, dexonsmith, llvm-commits

Differential Revision: https://reviews.llvm.org/D52203

git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@342573 91177308-0d34-0410-b5e6-96231b3b80d8

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