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fdc6177490
The OptimizeIntToFloatBitCast converts shift-truncate sequences into extractelement operations. The computation of the element index to be used in the resulting operation is currently only correct for little-endian targets. This commit fixes the element index computation to be correct for big-endian targets as well. If the target byte order is unknown, the optimization cannot be performed at all. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178031 91177308-0d34-0410-b5e6-96231b3b80d8
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