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Author SHA1 Message Date
Evan Cheng 95bdc5d899 RangeIsDefinedByCopyFromReg() should check for subreg_to_reg, insert_subreg, 
and extract_subreg as a "copy" that defines a valno.
Also fixes a typo. These two issues prevent a simple subreg coalescing from
happening before.

llvm-svn: 86022
 2009-11-04 08:33:14 +00:00