[PATCH] D77560: [SCEV] CreateNodeForPhi should return SCEVUnknown for incomplete PHIs

[wael yehia via Phabricator via llvm-commits]

w2yehia added a comment.

gentle ping. 
Just to summarize. The testcase demonstrating the issue is added to `llvm/unittests/Analysis/ScalarEvolutionTest.cpp`. 
The description of what the issue is, is in the "The problem" section in the description of this review. 
The solution implemented in this review is to detect when an "incomplete" PHI is being `createSCEV`'ed  and return a SCEVUnknown.
Feedback is greatly appreciated.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D77560/new/

https://reviews.llvm.org/D77560