[llvm] [BOLT][AArch64] Patch functions targeted by optional relocs (PR #138750)

Tue May 6 12:50:19 PDT 2025

https://github.com/maksfb created https://github.com/llvm/llvm-project/pull/138750

On AArch64, we create optional/weak relocations that may not be processed due to the relocated value overflow. When the overflow happens, we used to enforce patching for all functions in the binary via --force-patch option. This PR relaxes the requirement, and enforces patching only for functions that are target of optional relocations. Moreover, if the compact code model is used, the relocation overflow is guaranteed not to happen and the patching will be skipped.

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