[PATCH] D104060: Machine IR Profile

[David Li via Phabricator via llvm-commits]

davidxl added a comment.

Can you compare the instrumentation overhead with -fcs-profile-generate? (as with -fprofile-generate). You may also want to disable value profiling (which can be expensive) in -fcs-profile-generate.

In the MIP description, it mentions that the counter size is 1 byte. This is good enough for coverage testing, but not enough to track hotness.


Repository:
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https://reviews.llvm.org/D104060