Shoaib Meenai 6404f4b5af [InstCombine] Remove attributes after hoisting free above null check ...

If the parameter had been annotated as nonnull because of the null
check, we want to remove the attribute, since it may no longer apply and
could result in miscompiles if left. Similarly, we also want to remove
undef-implying attributes, since they may not apply anymore either.

Fixes PR52110.

Reviewed By: nikic

Differential Revision: https://reviews.llvm.org/D111515

2021-10-13 15:34:56 -07:00

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