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3e20d61b66
Summary: We should excluded unreachable operands from processing as their DFS visitation order is undefined. When `renameUses` function sorts `OpsToRename` (https://fburl.com/d2wubn60), the comparator assumes that the parent block of the operand has a corresponding dominator tree node. This is not the case for unreachable operands and crashes the compiler. Reviewers: dberlin, mgrang, davide Subscribers: efriedma, hiraditya, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D61154 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@360796 91177308-0d34-0410-b5e6-96231b3b80d8