[PATCH] D51240: Add a flag to remap manglings when reading profile data information.

[Richard Smith - zygoloid via Phabricator via llvm-commits]

rsmith added a comment.

In https://reviews.llvm.org/D51240#1213179, @davidxl wrote:

> Can you split the patch into two? One for sample PGO and one for instrumentation.


I've split the patch up thusly:

https://reviews.llvm.org/D51246 is the common infrastructure shared by sample PGO and instrumentation-based profiling.
https://reviews.llvm.org/D51247 is the core support for remapping profiling data for instrumentation-based profiling.
https://reviews.llvm.org/D51248 is the core support for remapping profiling data for sample-based profiling.
https://reviews.llvm.org/D51249 is plumbing the relevant flag through the pass manager, LTO, etc. I can try to split that up into instrumentation vs sample profiling too, but some parts of it are common between the two, so it's not straightforward.

The remaining changes are the plumbing in Clang to add the command-line flag and pass it into LLVM, which are essentially all common to both forms of profiling.


https://reviews.llvm.org/D51240