davidxl added a comment. Re "Why not":
The common use model of instrumentation based PGO and SamplePGO are quite different. The former usually uses 'fresh' profile that matches the source. If there are massive code refactoring or ABI changes, the user can simply regenerate the profile. For the latter, the profile data is usually collected from production binaries, so the source is almost always newer than the profile. https://reviews.llvm.org/D51240 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
