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Author SHA1 Message Date
Jakob Stoklund Olesen
e4709777e3 Eliminate copies of undefined values during coalescing. 
These copies would coalesce easily, but the resulting value would be
defined by a deleted instruction. Now we also remove the undefined value
number from the destination register.

This fixes PR10503.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136174 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-26 23:00:24 +00:00