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We used to collect debug info MDNodes in doInitialization and verify them in doFinalization. That is incorrect since MDNodes can be modified by passes run between doInitialization and doFinalization. To fix the problem, we handle debug info MDNodes that can be reached from a function in runOnFunction (i.e we collect those nodes by calling processDeclare, processValue and processLocation, and then verify them in runOnFunction). We handle debug info MDNodes that can be reached from named metadata in doFinalization. This is in line with how Verifier handles module-level data (they are verified in doFinalization). rdar://15472296 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194974 91177308-0d34-0410-b5e6-96231b3b80d8
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