[PATCH] D87965: [InstCombine] replace phi values from unreachable blocks with 'undef'

[Roman Lebedev via Phabricator via llvm-commits]

lebedev.ri accepted this revision.
lebedev.ri added a comment.
This revision is now accepted and ready to land.

lg



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Comment at: llvm/lib/Transforms/InstCombine/InstructionCombining.cpp:2816
 
+    replaceInstUsesWith(*Prev, UndefValue::get(Prev->getType()));
     eraseInstFromFunction(*Prev);
----------------
This needs a motivational comment


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