CXX TLS: collect return blocks after SelectAllBasicBlocks.

It is incorrect to get the corresponding MBB for a ReturnInst before
SelectAllBasicBlocks since SelectAllBasicBlocks can change the
correspondence between a ReturnInst and the MBB it is in.

PR27062


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@264358 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed