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Add two additional profile quality stats for CG (call graph) and CFG (control flow graph) flow conservations besides the CFG discontinuity stats introduced in #109683. The two new stats quantify how different "in-flow" is from "out-flow" in the following cases where they should be equal. The smaller the reported stats, the better the flow conservations are. CG flow conservation: for each function that is not a program entry, the number of times the function is called according to CG ("in-flow") should be equal to the number of times the transition from an entry basic block of the function to another basic block within the function is recorded ("out-flow"). CFG flow conservation: for each basic block that is not a function entry or exit, the number of times the transition into this basic block from another basic block within the function is recorded ("in-flow") should be equal to the number of times the transition from this basic block to another basic block within the function is recorded ("out-flow"). Use `-v=1` for more detailed bucketed stats, and use `-v=2` to dump functions / basic blocks with bad flow conservations.
5 lines
400 B
Plaintext
5 lines
400 B
Plaintext
## Check profile quality stats reporting
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RUN: yaml2obj %p/Inputs/blarge_new.yaml &> %t.exe
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RUN: llvm-bolt %t.exe -o %t.out --pa -p %p/Inputs/blarge_new.preagg.txt | FileCheck %s
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CHECK: profile quality metrics for the hottest 5 functions (reporting top 5% values): function CFG discontinuity 100.00%; call graph flow conservation gap 60.00%; CFG flow conservation gap 45.53% (weighted) 96.87% (worst)
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