[lit] Extract TestFormat base class, for future use.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188945 91177308-0d34-0410-b5e6-96231b3b80d8
[lit] Simplify --time-tests code.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188946 91177308-0d34-0410-b5e6-96231b3b80d8
[lit] Factor out a separate Test.Result() object.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188947 91177308-0d34-0410-b5e6-96231b3b80d8
[lit] Allow formats to return lit.Test.Result instances directly.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188948 91177308-0d34-0410-b5e6-96231b3b80d8
[lit] Lift XFAIL handling to core infrastructure.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188949 91177308-0d34-0410-b5e6-96231b3b80d8
[tests] Update fma3 check to work with Py3.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188950 91177308-0d34-0410-b5e6-96231b3b80d8
[lit] Fix a couple lingering Py3 compat issues in ProgressBar.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188951 91177308-0d34-0410-b5e6-96231b3b80d8