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d1d897b032
Summary: FlattenCFG may erase unnecessary blocks, which also invalidates iterators to those erased blocks. Before this patch, `iterativelyFlattenCFG` could try to increment a BB iterator after that BB has been removed and crash. This patch makes FlattenCFGPass use `WeakVH` to skip over erased blocks. Reviewers: dblaikie, tstellar, davide, sanjoy, asbirlea, grosser Reviewed By: asbirlea Subscribers: hiraditya, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D67672 llvm-svn: 372347