[cfe-dev] Patch to add __builtin_shufflevector

[Eli Friedman]

Per subject, patch to add __builtin_shufflevector.  This is needed to
implement mmintrin.h and friends efficiently on top of LLVM, because
LLVM isn't very smart about vectors, and vectors are hard(tm).  The
diagnostics aren't quite right, but other than that, does this patch
look okay?

-Eli
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