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Summary: This is obviously an interesting case because it may motivate code restructuring or LTO. Reporting this requires instantiation of ORE in the loop where the call sites are first gathered. I've checked compile-time overhead *with* -Rpass-with-hotness and the worst slow-down was 6% in mcf and quickly tailing off. As before without -Rpass-with-hotness there is no overhead. Because this could be a pretty noisy diagnostics, it is currently qualified as 'verbose'. As of this patch, 'verbose' diagnostics are only emitted with -Rpass-with-hotness, i.e. when the output is expected to be filtered. Reviewers: eraman, chandlerc, davidxl, hfinkel Subscribers: tejohnson, Prazek, davide, llvm-commits Differential Revision: https://reviews.llvm.org/D23415 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@279860 91177308-0d34-0410-b5e6-96231b3b80d8
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