[PATCH] D75977: [JumpThreading] Fix PR44611

[JunMa via Phabricator via llvm-commits]

junparser created this revision.
junparser added a reviewer: kazu.
Herald added subscribers: llvm-commits, hiraditya.
Herald added a project: LLVM.
junparser added a reviewer: wmi.

As title, this patch fixes hang (https://bugs.llvm.org/show_bug.cgi?id=44611) which caused by  unreachable cycles inside cfg when build with jump-threading-across-loop-headers.

TestPlan: check-llvm


https://reviews.llvm.org/D75977

Files:
  llvm/lib/Transforms/Scalar/JumpThreading.cpp
  llvm/test/Transforms/JumpThreading/PR33357-lvi-recursion.ll
  llvm/test/Transforms/JumpThreading/PR44611-across-header-hang.ll
  llvm/test/Transforms/JumpThreading/removed-use.ll

-------------- next part --------------
A non-text attachment was scrubbed...
Name: D75977.249565.patch
Type: text/x-patch
Size: 3963 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20200311/57ceb2d1/attachment.bin>