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Evan Cheng 613996c55e 1. If both vector operands of a vector_shuffle are undef, turn it into an undef.
2. A shuffle mask element can also be an undef.

llvm-svn: 27472
2006-04-06 23:20:43 +00:00
llvm 1. If both vector operands of a vector_shuffle are undef, turn it into an undef. 2006-04-06 23:20:43 +00:00