[llvm] [hwasan] Optimize outlined memaccess for fixed shadow on Aarch64 (PR #88544)

[Vitaly Buka via llvm-commits]

https://github.com/vitalybuka commented:

we need 2 tests:
1.  llvm/lib/Transforms/Instrumentation/HWAddressSanitizer.cpp
2.  llvm/lib/Target/AArch64/

If it's not a update to the test, please precommit the current behavior in a separate patch.

I'd would recommend to move HWAddressSanitizer.cpp and test into a patch
We can introduce intrinsic and lowering in the first patch.

I don't insist about splitting, though.

https://github.com/llvm/llvm-project/pull/88544