[PATCH] D27324: IPO: Introduce ThinLTOBitcodeWriter pass.

[Peter Collingbourne via Phabricator via llvm-commits]

pcc added a comment.

In https://reviews.llvm.org/D27324#613985, @mehdi_amini wrote:

> Ouch, that seems *huge* to me.


As mentioned on IRC: the time spent in the midend is CFI-specific (and necessarily sequential), and I'm going to be looking at optimizing it anyway. The parts that would have similar timings regardless of CFI/devirtualization settings are "LTO::addRegularLTO" and "lto::backend codegen", and I'm satisfied with the timings for those parts.


https://reviews.llvm.org/D27324