tree 9f1dbb1561419c79255dd48de59b5c2e91c54de7
parent 2fba72a28b2d94d8f38a6d4cf4b497c80c7deecb
author eleviant <56861949+eleviant@users.noreply.github.com> 1766424698 +0100
committer Copybara-Service <copybara-worker@google.com> 1766425172 -0800

Avoid merging globals residing in different comdats (#172835)

The global-merge pass may merge globals residing in different comdat
groups, which may later confuse linker if section GC is being used. In
particular this may happen when merging instrumentation profiler
counters when their corresponding __llvm_prf_cnts sections are being
merged into a single one and moved out of a comdat group, containing
__llvm_prf_cnts and __llvm_prf_data sections. After that __llvm_prf_data
section is becoming orphaned and is garbage-collected when --gc-sections
linker flag is used.

GitOrigin-RevId: b785c99ea9059d4a2c0de6c0f562c7936f071670