[PATCH] D62439: PGO] Handle cases of failing to split critical edges

[Rong Xu via Phabricator via llvm-commits]

xur created this revision.
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Fix PR41279 where critical edges to EHPad are not split.

The fix is to not instrument those critical edge. We used to be able to know the size of counters right after MST is computed. With this, we have to pre-collect the instrument BBs to know the size, and then instrument them.


https://reviews.llvm.org/D62439

Files:
  llvm/lib/Transforms/Instrumentation/PGOInstrumentation.cpp
  llvm/test/Transforms/PGOProfile/PR41279.ll

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