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Author SHA1 Message Date
Bob Wilson
5d52165e4e Fix a register scavenger crash when dealing with undefined subregs. 
The LowerSubregs pass needs to preserve implicit def operands attached to
EXTRACT_SUBREG instructions when it replaces those instructions with copies.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107189 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-29 18:42:49 +00:00