Ellis Hoag b0154c36d6 [InstrProf] Add pgo use block coverage test (#72443) ...

Back in https://reviews.llvm.org/D124490 we added a block coverage mode
that instruments a subset of basic blocks using single byte counters to
get coverage for the whole function.

This commit adds a test to make sure that we correctly assign branch
weights based on the coverage profile.

I noticed this test was missing after seeing that we had no coverage on
`PGOUseFunc::populateCoverage()`

https://lab.llvm.org/coverage/coverage-reports/coverage/Users/buildslave/jenkins/workspace/coverage/llvm-project/llvm/lib/Transforms/Instrumentation/PGOInstrumentation.cpp.html#L1383

2023-11-20 09:25:33 -06:00

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