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Evan Cheng 9d9b58cc0d Canonicalize (srl (bswap x), 16) to (rotr (bswap x), 16) if the high 16 bits
of x are zero. This optimizes rev + lsr 16 to rev16.

rdar://10750814

llvm-svn: 151230
2012-02-23 02:58:19 +00:00
..
2012-02-22 16:09:41 +00:00