[PATCH] D25132: Invoke add-discriminator at -g0 -fsample-profile

[Paul Robinson via llvm-commits]

probinson added a comment.

In https://reviews.llvm.org/D25132#562973, @echristo wrote:

>   I'm assuming the pass is only enabled when we're either a) emitting debug info, or b) going to annotate IR for samplepgo.


Actually it looks like Clang unconditionally adds the pass and then lets the pass decide whether to do anything on its own.  I don't offhand know where LTO decides what to use for a pass pipeline.


https://reviews.llvm.org/D25132