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As we perform a zext on any arguments used in the promoted tree, it doesn't matter if they're marked as signext. The only permitted user(s) in the tree which would interpret the sign bits are signed icmps. For these instructions, their promoted operands are truncated before the icmp uses them. Differential Revision: https://reviews.llvm.org/D68019 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@373186 91177308-0d34-0410-b5e6-96231b3b80d8