tree a7988fb97906c96cdb1ec77747c38c87e4ae2c5f
parent cc0d9954c86a0ba07d4de2bde939d2debf7fea38
author Han-Wen Nienhuys <hanwen@google.com> 1439209676 +0000
committer Laszlo Csomor <laszlocsomor@google.com> 1439279474 +0000

Experimental support LLVM ThinLTO.

ThinLTO is a Link Time Opimization strategy, where the inlining step operates on LLVM intermediate code, and is sharded across multiple compiler invocations, so they can be parallelized. For more information, see http://llvm.org/devmtg/2015-04/slides/ThinLTO_EuroLLVM2015.pdf

Using this features requires an experimental LLVM toolchain, with the following stanza in CROSSTOOL

  feature {
    name: "thin_lto"
    flag_set {
      action: "c-compile"
      action: "c++-compile"
      flag_group {
       flag: "-Xclang-only=-Wno-inconsistent-missing-override"
       flag: "-flto"
       flag: "-O2"
      }
    }
  }

--
MOS_MIGRATED_REVID=100269776