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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 -...