[PATCH] D27324: IPO: Introduce ThinLTOBitcodeWriter pass.

Tue Dec 6 14:22:02 PST 2016

pcc added a comment.

After https://reviews.llvm.org/D27484 (actually a slightly different version of that patch rebased onto my prototype branch) the timings look like this:

   ---User Time---   --System Time--   --User+System--   ---Wall Time---  --- Name ---
   5.8192 ( 40.7%)   0.1061 ( 17.5%)   5.9253 ( 39.8%)   5.6562 ( 37.7%)  LTO::addRegularLTO
   3.9290 ( 27.5%)   0.2029 ( 33.5%)   4.1319 ( 27.7%)   4.4836 ( 29.9%)  LTO::addThinLTO
   3.6604 ( 25.6%)   0.1720 ( 28.4%)   3.8325 ( 25.7%)   3.8303 ( 25.6%)  lto::backend opt
   0.8909 (  6.2%)   0.1242 ( 20.5%)   1.0151 (  6.8%)   1.0144 (  6.8%)  lto::backend codegen
  14.2996 (100.0%)   0.6052 (100.0%)  14.9048 (100.0%)  14.9844 (100.0%)  Total

https://reviews.llvm.org/D27324