Rebased to main.
The earlier base-regression was a precommitted test-case that caused
SimpleLoopUnswitch tests (not related to these changes) to fail.

Adds two fixes for issues uncovered by the CI:

• The update of NumAArch64CPUArchs had been lost in a "rebase gone wrong" (i.e., another target was added and the previously increased-by-1 value now was the already present upstream). This adjusts the value of NumAArch64CPUArchs to again account for the addition of an extra target.
• Adjusts the ARMCPUTestParams for ampere1 to reflect that ARMv8.6 encodes the crypto extensions differently than lower architecture levels.

• additional tab -> space conversion (hopefully, I have emacs configured correctly now)
• added SBSS and MTE to the SubtargetFeatures
• inserted AMpere1 in the subtarget enum in alphabetical order

Update to reflect review results.

Update formatting as requested.

No objections from me.
I would be unlikely to find time to work on moving this forward until after
RiSC-V Summit, so it‘s much appreciated if someone else rebases and merges
it.

After reviewing, it is not subsumed by the other work — I originally
thought that some of the changes that Jessica had landed would have made
this unnecessary, but was wrong on that account.

I thought that this was subsumed by a different change.
If we are still interested in it, I can pick it up again…

[Looks like the mail-to-phabricator gateway truncated my reply, so here is the original message again that followed the "Alex," line.]

Simplified and cleaned up the test case.

Added test case.

Removed comment left-over after removing the call to setHasMultipleConditionRegisters().

Please go ahead and commit this for me.

Update the comment to reflect that this will turn into a blez instruction.

Update whitespaces to all-spaces for tabs-and-spaces.

This updates the test cases and I have rerun 'ninja check' to ensure no further test issues.
The commit message has also been updated to reflect that this is a blez-instruction.

Added a testcase and rebased onto

commit 49942c6d4a0aee740381f754a6a0e6f7e1bfed43
Author: Quentin Colombet <qcolombet@apple.com>
Date:   Wed Mar 10 13:28:53 2021 -0800