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llvm-6502/lib/CodeGen/LiveVariables.cpp
Jakob Stoklund Olesen 7806c0778f Teach LiveVariables to handle <undef> operands. 
It's simple: Don't treat <undef> operands as uses, and don't assume a
virtual register has a defining instruction unless a real use has been
seen.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@159061 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-23 02:23:00 +00:00

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