[objcmt] Use FileIDs directly instead of their hash value.

No functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@194590 91177308-0d34-0410-b5e6-96231b3b80d8
Adds ARM backend options: -mrestrict-it and -mno-restrict-it

To support the generation of IT block in Thumbv7 way or
Thumbv8 way


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@194593 91177308-0d34-0410-b5e6-96231b3b80d8
Drop windows specific handling of equivalent destructors.

Now that the relevant tests use -mconstructor-aliases and the missing
features have been implemented, we can just drop this.

No functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@194595 91177308-0d34-0410-b5e6-96231b3b80d8