[PATCH] D40146: [JumpThreading] Preservation of DT and LVI across the pass

Jakub Kuderski via Phabricator via llvm-commits llvm-commits at lists.llvm.org
Thu Jan 18 15:07:47 PST 2018


kuhar added a comment.

In https://reviews.llvm.org/D40146#980980, @MatzeB wrote:

> I'm currently seeing release+assert clang compilers apparently being stuck in an endless loop in the llvm test-suite (well I aborted after 10 minutes for a single file) hanging in some dominance tree verification code when I inspect the backtrace in lldb. Could this be caused by this commit?


Are you compiling with EXPENSIVE_CHECKS enabled? The full domtree verification is O(n^3), but is only run with expensive checks or `-verify-dom-info`, and can blow up on some weird CFG-s.


Repository:
  rL LLVM

https://reviews.llvm.org/D40146





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