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Other pieces of CodeGen want to negate frame object offsets to account for architectures where the stack grows down. Our object is a pseudo object so it's offset doesn't matter. However, we shouldn't choose an offset which results in undefined behavior if you negate it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237474 91177308-0d34-0410-b5e6-96231b3b80d8
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