Maksim Panchenko 49ee6069db [BOLT][AArch64] Add support for compact code model (#112110) ...

Add `--compact-code-model` option that executes alternative branch
relaxation with an assumption that the resulting binary has less than
128MB of code. The relaxation is done in `relaxLocalBranches()`, which
operates on a function level and executes on multiple functions in
parallel.

Running the new option on AArch64 Clang binary produces slightly smaller
code and the relaxation finishes in about 1/10th of the time.

Note that the new `.text` has to be smaller than 128MB, *and* `.plt` has
to be closer than 128MB to `.text`.

2024-11-07 14:51:12 -08:00

8.1 KiB

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