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7.27s
2015 Aug 12
2
Proposal/patch: simple parallel LTO code generation
...y, or its comdat if it has
one.) The resulting native object files can be combined by the linker in
the usual way.
This approach is reasonably effective. In one experiment, an LTO link of
Chromium at LTO opt level 1 on an HP Z620 machine took 15m20s without
parallelism, 8m06s with 4 partitions and 7m27s with 8 partitions.
I've attached a patch with an initial implementation of this idea for the
gold plugin. If this idea seems reasonable, I'll proceed to clean up the
patch and send it for review on llvm-commits.
Thanks,
--
Peter
[1] http://clang.llvm.org/docs/ControlFlowIntegrity.html
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