FailedChanges

Summary

  1. [BPF] fix a use after free bug (details)
Commit 9f34447f3ff525029ec889bf3a82b04678a9d7c0 by yhs
[BPF] fix a use after free bug
Commit fff2721286e1 ("[BPF] Fix CO-RE bugs with bitfields") fixed CO-RE
handling bitfield issues. But the implementation introduced a use after
free bug. The "Base" of the intrinsic might be freed so later on
accessing the Type of "Base" might access the freed memory. The failed
test case,
CodeGen/BPF/CORE/offset-reloc-middle-chain.ll is exactly used to test
such a case.
Similarly to previous attempt to remember Metadata etc, remember "Base"
pointee Alignment in advance to avoid such use after free bug.
The file was modifiedllvm/lib/Target/BPF/BPFAbstractMemberAccess.cpp