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Patch by: simoncook Unlike BitCasts, AddrSpaceCasts do not always produce an output the same size as its input, which was previously assumed. This fixes cases where two address spaces do not have the same size pointer, as an assertion failure would occur when trying to prove deferenceability. LoopUnswitch is used in the particular test, but LICM also exhibits the same problem. Differential Revision: http://reviews.llvm.org/D13008 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@248422 91177308-0d34-0410-b5e6-96231b3b80d8
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