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add a note that Nate mentioned last week

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23898 91177308-0d34-0410-b5e6-96231b3b80d8
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Chris Lattner 2005-10-23 21:44:59 +00:00
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commit ffff6175ef
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lib/Target/X86/README.txt
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@ -68,3 +68,8 @@ http://gcc.gnu.org/ml/gcc-patches/2004-09/msg01136.html
Another useful one would be ~0ULL >> X and ~0ULL << X.
//===---------------------------------------------------------------------===//
Should support emission of the bswap instruction, probably by adding a new
DAG node for byte swapping. Also useful on PPC which has byte-swapping loads.