[PATCH] D39345: SCEV: preserve debug information attached to PHI nodes.

[Adrian Prantl via Phabricator via llvm-commits]

aprantl updated this revision to Diff 120666.
aprantl added a comment.

Here is a slightly more general version that includes most of Hal's feedback. I will create a couple of more interesting testcases next to see how to handle cases where the result of subtracting the two recurrences is not a constant.


https://reviews.llvm.org/D39345

Files:
  lib/Analysis/ScalarEvolutionExpander.cpp
  test/Transforms/IndVarSimplify/scev-phi-debug-info.ll

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