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counter1
2016 Mar 11
8
RFC: Pass to prune redundant profiling instrumentation
Hi,
I'd like to add a new pass to LLVM which removes redundant profile counter
updates. The goal is to speed up code coverage testing and profile generation
for PGO.
I'm sending this email out to describe my approach, share some early results,
and gather feedback.
Problem Overview
================
A profile counter is redundant if it's incremented in exactly the same basic
blocks