Nikita Popov 5da9044c40 [MemCpyOpt] Fix clobber check in fca2memcpy optimization
This effectively reverts #108535. The old AA code was looking for
the *first* clobber between the load and store and then trying to
move all the way up there. The new MSSA based code instead found
the *last* clobber. There might still be an earlier clobber that
has not been accounted for.

Fixes #130632.
2025-03-12 14:53:50 +01:00
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