[FastISel][AArch64] Fix and extend the tbz/tbnz pattern matching.

The pattern matching failed to recognize all instances of "-1", because when
comparing against "-1" we didn't use an APInt of the same bitwidth.

This commit fixes this and also adds inverse versions of the conditon to catch
more cases.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222722 91177308-0d34-0410-b5e6-96231b3b80d8
Use range loops. NFC.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222723 91177308-0d34-0410-b5e6-96231b3b80d8
Don't repeat name in comment or duplicate comment. NFC.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222724 91177308-0d34-0410-b5e6-96231b3b80d8
Link the type of aliases.

They are not more or less "well typed" than GlobalVariables.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222725 91177308-0d34-0410-b5e6-96231b3b80d8