[PATCH] D36592: [BDCE] clear poison generators after turning a value into zero (PR33695, PR34037)

[Sanjay Patel via Phabricator via llvm-commits]

spatel updated this revision to Diff 110728.
spatel marked 2 inline comments as done.
spatel added a comment.

Patch updated:

1. Use a loop (worklist) rather than recursion to avoid blowing up the stack.
2. Add an exclusion list based on opcodes to stop the search.
3. Add a test to show that the exclusion list works for a call inst.
4. Add a TODO comment with Nuno's suggestion from the bug report to make this better.


https://reviews.llvm.org/D36592

Files:
  lib/Transforms/Scalar/BDCE.cpp
  test/Transforms/BDCE/invalidate-assumptions.ll

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