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Tim Northover
0f7b4d7811
Some atomic loads are implemented as cmpxchg (particularly if large or floating), and that usually requires write access to the memory involved or it will segfault. We can still propagate the constant value to users we understand though. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@360662 91177308-0d34-0410-b5e6-96231b3b80d8
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