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clang-p2996/llvm/lib/CodeGen/LowerSubregs.cpp
Bob Wilson d91d5bfc95 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.

llvm-svn: 107189
2010-06-29 18:42:49 +00:00

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