Nikita Popov 9f85bc834b [PPCMergeStringPool] Only replace constant once (#92996) ...

In #88846 I changed this code to use RAUW to perform the replacement
instead of manual updates -- but kept the outer loop, which means we try
to perform RAUW once per user. However, some of the users might be freed
by the RAUW operation, resulting in use-after-free.

The case where this happens is constant users where the replacement
might result in the destruction of the original constant.

Fixes https://github.com/llvm/llvm-project/issues/92991.

2024-05-27 08:54:11 +02:00

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